WO2013042604A1 - Electronic equipment - Google Patents

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Publication number
WO2013042604A1
WO2013042604A1 PCT/JP2012/073435 JP2012073435W WO2013042604A1 WO 2013042604 A1 WO2013042604 A1 WO 2013042604A1 JP 2012073435 W JP2012073435 W JP 2012073435W WO 2013042604 A1 WO2013042604 A1 WO 2013042604A1
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WO
WIPO (PCT)
Prior art keywords
coil
coupling
card
type device
antenna
Prior art date
Application number
PCT/JP2012/073435
Other languages
French (fr)
Japanese (ja)
Inventor
加藤登
用水邦明
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2013534681A priority Critical patent/JP5737413B2/en
Priority to CN201280036631.8A priority patent/CN103703473B/en
Publication of WO2013042604A1 publication Critical patent/WO2013042604A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils

Definitions

  • the present invention relates to an electronic device used in an RFID (Radio Frequency Identification) system or a near field communication (NFC) system that communicates with a counterpart device via an electromagnetic field signal.
  • RFID Radio Frequency Identification
  • NFC near field communication
  • NFC is one of the wireless communication standards using the RFID system, and is expected to be installed in various terminal devices including mobile phone terminals.
  • radio signals in the 13 MHz band HF band
  • RFIC Radio Frequency ⁇ ⁇ Integrated Circuit
  • Patent Document 1 discloses a configuration in which an RFIC chip is provided in a removable card type device and wireless communication with a communication partner antenna is performed using an antenna coil on the terminal body side. Yes.
  • a coil is provided in the card-type device, and this coil is electromagnetically coupled to the antenna coil on the terminal body side, thereby electrically connecting the RFIC chip and the terminal body side antenna coil.
  • an RFID function can be added to a card type device such as an SD memory card without using an input / output terminal that the card type device originally has.
  • Various electronic devices including a communication terminal device using a card type device such as an SD memory card have a slot case for inserting the card type device. Since the slot case is required for strength and durability, the slot case is made of a metal body. Since the metal body hinders the passage of magnetic flux of the antenna (coil), there is a problem that it is difficult to electromagnetically couple the coil on the card-type device side and the antenna coil on the electronic device side with a high degree of coupling.
  • An object of the present invention is to provide an electronic device capable of strongly coupling a coil provided in a card-type device and a communication counterpart device outside the electronic device.
  • the electronic apparatus of the present invention is configured as follows.
  • a card mounting unit configured to be detachable from a card-type device having a feeding coil, and an antenna coil.
  • the card mounting portion includes a coupling conductor that electromagnetically couples to the feeding coil and the antenna coil of the card type device.
  • a plane parallel to the plane of the card type device is a coil opening surface
  • the coupling conductor of the card mounting portion is a portion facing (facing) the coil opening of the power supply coil. It is preferable to have an opening provided in the slit and a slit connecting the opening and the outer edge of the card mounting portion.
  • the card mounting portion includes a top surface having a plurality of sides and two side surfaces respectively connected to at least two sides of the plurality of sides, and the top surface includes the opening of the card mounting portion and the top surface. It is preferable that a slit portion is provided and an opening is provided on a side surface different from the side surface on which the insertion port of the card type device is provided.
  • a plane parallel to the plane of the card type device is a coil opening surface
  • the coupling conductor of the card mounting portion is a conductor pattern formed on the circuit board and the circuit board. It is preferable that a coil including an attached metal member and having a plane parallel to the plane of the card-type device as a coil opening surface is configured by the conductor pattern and the metal member.
  • the feeding coil of the card-type device has a coil axis in the insertion direction of the card-type device (one axis parallel to the plane of the card-type device), and the coupling conductor of the card mounting portion is attached to the circuit board. It is preferable that a metal member attached to the formed conductor pattern and the circuit board is provided, and the conductor pattern and the metal member constitute a coil having the insertion direction of the card type device as a coil axis.
  • the antenna coil overlaps with the outer periphery of the coupling conductor of the card mounting portion in plan view.
  • the antenna coil includes a coupling coil unit coupled to a coupling conductor of the card mounting unit and a radiation coil unit having a coil diameter larger than that of the coupling coil unit.
  • the coupling coil portion of the antenna coil is arranged so as to go around the opening of the coupling conductor of the card mounting portion in plan view.
  • the antenna coil includes a first antenna coil and a second antenna coil that are formed on different layers and face each other, and the first antenna coil and the second antenna coil are coupled to each other via a capacitor. It is preferable that the currents flowing due to the coupling with the coupling conductor of the card mounting portion are in the same direction.
  • the feeding coil and the slot case of the card type device are electromagnetically coupled, and the slot case and the antenna coil are electromagnetically coupled, so that the feeding coil is fed from the RFIC chip in the card type device.
  • high frequency power is transmitted to the antenna coil through the slot case. Accordingly, it is possible to add a communication function such as RFID to the card type device without using the input / output terminals that the card type device originally has.
  • a metal slot case high-frequency power can be efficiently transmitted from the power supply coil of the card-type device to the antenna coil of the terminal body, which is excellent in strength and durability, and communication.
  • a communication terminal device having excellent characteristics can be obtained.
  • FIG. 1 is a perspective view showing a configuration of a communication terminal apparatus 101 according to the first embodiment.
  • 2A is a perspective view of a mounting portion of the slot case 21 with respect to the printed wiring board 22
  • FIG. 2B is a diagram illustrating the shape of the power feeding coil 12
  • FIG. 2C is a diagram illustrating the slot case 21, the power feeding coil 12, and the like. It is a figure which shows the relationship on a plane.
  • 3A is a cross-sectional view of the main part of the communication terminal apparatus 101, and FIG. 3B is a partially enlarged view thereof.
  • FIG. 4A is a diagram showing the inner surface of the housing 41 to which the booster antenna 301 is attached.
  • FIG. 4B is a view of the radiation coil portion 311R and the coupling coil portion 311C formed on the first main surface of the base sheet 30 as viewed from the first main surface side of the base sheet, and FIG. These are the figures which looked through the radiation
  • FIG. 5A is a perspective view showing the positional relationship between the slot case 21 and the coupling coil portion 31C.
  • FIG. 5B is a plan view showing the positional relationship between the slot case 21 and the coupling coil portion 31C.
  • FIG. 6A is a diagram showing a state of coupling between the communication terminal apparatus 101 and the communication partner antenna.
  • FIG. 6B is a diagram illustrating a state of coupling of the power supply coil, the slot case, and the coupling coil unit of the card type device 10.
  • FIG. 7 is a view showing a state of coupling with the feeding coil, slot case, and coupling coil portion of the card type device 10.
  • FIG. 8 is an equivalent circuit diagram of the communication terminal apparatus 101 according to the first embodiment in which the card type device 10 is mounted.
  • FIG. 9 is a perspective view showing a main configuration inside the housing of the communication terminal device of the second embodiment.
  • FIG. 10 is a diagram illustrating a configuration of the slot case 21 provided in the housing of the communication terminal device according to the second embodiment.
  • FIG. 11 is a perspective view illustrating a main configuration inside the housing of the communication terminal device according to the third embodiment.
  • FIG. 12 is a diagram illustrating a configuration of an antenna coil provided in the housing of the communication terminal device according to the third embodiment.
  • FIG. 13 is an equivalent circuit diagram of an antenna coil provided in the housing of the communication terminal device according to the third embodiment.
  • FIG. 14 is a diagram illustrating a positional relationship between a slot case and an antenna coil provided in the housing of the communication terminal device according to the third embodiment.
  • FIG. 15 is a perspective view showing the main configuration inside the housing of the communication terminal device of the fourth embodiment.
  • FIG. 16 shows the configuration of the antenna coil provided in the housing of the communication terminal device of the fourth embodiment.
  • FIG. 17 is a diagram illustrating a positional relationship between a slot case and an antenna coil provided in the housing of the communication terminal device according to the fourth embodiment.
  • FIG. 18 is a cross-sectional view of a main part of the communication terminal device 105 according to the fifth embodiment.
  • FIG. 19A is an external perspective view of the communication terminal device 106
  • FIG. 19B is a perspective view showing the main configuration inside the housing of the communication terminal device 106.
  • FIG. 20A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and
  • FIG. 20B is a plan view of the vicinity of the card mounting portion 20.
  • FIG. 20C is a diagram showing a state of coupling between the metal member of the card mounting portion and the feeding coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. It is.
  • FIG. 20C is a diagram showing a state of coupling between the metal member of the card mounting portion and the feeding coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of
  • FIG. 21A is an external perspective view of the communication terminal device 107
  • FIG. 21B is a perspective view showing a main configuration inside the housing of the communication terminal device 107
  • 22A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22
  • FIG. 22B is a plan view of the vicinity of the card mounting portion 20
  • FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil.
  • FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil.
  • the electronic apparatus of the present invention is an apparatus that uses a card-type device.
  • information communication terminals such as mobile phone terminals, notebook PCs, tablet PCs, handy terminals (data collection terminals), information media devices such as digital still cameras, digital video cameras, and digital audio recorders.
  • a communication terminal apparatus having an HF band RFID system represented by an NFC system is taken as an example.
  • FIG. 1 is a perspective view showing the configuration of the communication terminal apparatus 101 according to the first embodiment.
  • FIG. 1A is an external perspective view of the communication terminal apparatus 101
  • FIG. 1B is a perspective view showing a main configuration inside the housing of the communication terminal apparatus 101.
  • the housing 41 of the communication terminal device 101 is a rectangular housing having a longitudinal direction and a short direction, and includes a front surface FF (one main surface), a back surface RF (the other main surface), and a front surface FF and a back surface RF. Are connected to each other.
  • the housing 41 may be one in which two casings are connected like a sliding terminal or a folding terminal, or may be a bar type.
  • the housing 41 of the communication terminal apparatus 101 includes a card slot 42 into which the card type device 10 is inserted and removed.
  • An antenna coil 31 is provided inside the housing 41.
  • An RFIC and a feeding coil 12 described later are provided inside the card type device 10. A plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
  • the card-type device 10 is a small card-type device that can be attached to and detached from the terminal body, such as a memory card such as an SD (Secure Digital) card or a SIM (Subscriber Identity Module) card,
  • the power supply coil 12 is connected to the RFIC.
  • the RFIC constitutes a front-end circuit in a communication system represented by an RFID system, and is configured as a semiconductor integrated circuit having an RF circuit, a memory circuit, a logic circuit, and the like.
  • the RFIC is basically configured as a silicon semiconductor element and may be a bare chip or a package IC.
  • the feeding coil 12 is a coil element to which an input / output terminal of the RFIC is connected, and is provided on the casing or the casing surface of the card type device 10. This coil element may be a laminated coil element or a planar spiral coil element.
  • a metal slot case 21 is attached to the printed wiring board 22.
  • the slot case 21 corresponds to the “card mounting portion” of the present invention.
  • the slot case 21 forms a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22.
  • a terminal On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided.
  • the card type device 10 is mounted in the slot case 21, and the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
  • the antenna coil 31 is composed of two layers of antenna coils facing each other through a dielectric layer.
  • the antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing 41.
  • the antenna coil 31 includes a radiation coil portion 31R and a coupling coil portion 31C that are electrically connected to each other, and the coupling coil portion 31C is close to the slot case 21.
  • the radiation coil portion 31R has a larger coil diameter than the coupling coil portion 31C. That is, the radiation coil part 31R is mainly responsible for wireless communication with the antenna coil on the communication partner side, and the coupling coil part 31C is configured to be responsible for electromagnetic field coupling (mainly magnetic field coupling) with the slot case 21.
  • the radiation coil portion 31R is provided with a magnetic layer such as a ferrite sheet on the side opposite to the surface (back surface RF) facing the communication partner antenna.
  • the area of the radiation coil portion 31R (the area surrounded by the outermost pattern of the coil pattern constituting the radiation coil portion 31R) is surrounded by the area of the coupling coil portion 31C (the outermost pattern of the coil pattern constituting the coupling coil portion 31C). 2) or more, and even 4 times or more of the above is preferable in that radiation characteristics can be increased while effectively using the size of the terminal housing.
  • FIG. 2 is a diagram showing the configuration of the slot case 21 and the relationship between the slot case 21 and the feeding coil 12.
  • 2A is a perspective view of a mounting portion of the slot case 21 with respect to the printed wiring board 22
  • FIG. 2B is a diagram illustrating the shape of the power feeding coil 12
  • FIG. 2C is a diagram illustrating the slot case 21, the power feeding coil 12, and the like. It is a figure which shows the relationship on a plane.
  • the slot case 21 is made of a metal member such as stainless steel, or at least a part of the slot case 21 is made of a metal member.
  • the metal portion of the slot case 21 is provided with an opening 21A provided at a portion facing the coil opening of the power feeding coil 12, and a slit portion 21S that connects the opening 21A and the outer edge of the slot case 21.
  • the size of the opening 21A is arbitrary, and the width of the opening 21A is usually larger than the width of the slit 21S.
  • the feeding coil 12 is a rectangular spiral coil.
  • RFICs 11 are connected to both ends of the feeding coil 12. Since the opening 21 ⁇ / b> A of the slot case 21 is provided at a portion facing the coil opening of the power feeding coil 12, the card type device 10 is mounted on the slot case 21, and the power feeding coil 12 is electromagnetically attached to the slot case 21.
  • an electric current flows through the slot case 21 so as to go around the opening 21A as indicated by an arrow in FIG.
  • the slot case 21S is formed in the slot case 21 to connect the opening 12A and the outer edge of the slot case 21, eddy current does not flow through the slot case 21, and the slot case 21 passes through the slit part 21S. A current flows along the outer edge of the.
  • the slot case 21 includes a top surface having a plurality of sides and two side surfaces respectively connected to at least two sides of the plurality of sides, and an opening 21A and a slit portion 21S of the slot case 21 are provided on the top surface.
  • the opening SS is preferably provided on a side surface different from the side surface on which the insertion slot CS of the card type device 10 is provided.
  • the slot case 21 has a rectangular top surface and four side surfaces connected to the top surface in a plan view, and the insertion slot CS is left on the side surface into which the card-type device 10 is inserted. Openings SS are respectively provided on the three side surfaces.
  • the position of the slit portion 21S of the slot case 21 may be cut to the insertion slot CS side of the card type device 10. It may be cut toward the inside of the housing.
  • the slit portion 21S is cut in a direction mainly coupled to the antenna coil (or the coupling coil portion of the antenna coil). Preferably it is.
  • the mechanical strength of the portion where the slit portion 21S is formed is somewhat lowered, the slit portion 21S is formed on the opposite side of the insertion slot CS of the card type device 10 as shown in FIGS. It is preferable that
  • the entire opening 21A of the slot case 21 overlaps the coil opening of the power feeding coil 12 in plan view, but may partially overlap. That is, it is sufficient that at least a part of them overlap.
  • the entire opening 21 ⁇ / b> A of the slot case 21 overlaps the coil opening of the power feeding coil 12, the degree of coupling between the power feeding coil 12 and the slot case 21 increases.
  • FIG. 3A is a cross-sectional view of the main part of the communication terminal apparatus 101, and FIG. 3B is a partially enlarged view thereof.
  • FIG. 4A is a diagram showing the inner surface of the housing 41 to which the booster antenna 301 is attached.
  • 4B and 4C are plan views of only the antenna coil and the coupling coil formed in the booster antenna 301.
  • FIG. 4A is a diagram showing the inner surface of the housing 41 to which the booster antenna 301 is attached.
  • 4B and 4C are plan views of only the antenna coil and the coupling coil formed in the booster antenna 301.
  • a booster antenna 301 is attached to the inner surface of the rear surface RF of the housing 41 (FIG. 3 is a state in which the housing is placed upside down).
  • the booster antenna 301 includes a base material sheet 30, a radiation coil portion 311 ⁇ / b> R formed on the first main surface of the base material sheet 30, a coupling coil portion 311 ⁇ / b> C, and a radiation coil portion formed on the second main surface of the base material sheet 30.
  • 312R, the coupling coil part 312C, and the ferrite sheet 32 are comprised.
  • FIG. 4B is a view of the radiation coil portion 311R and the coupling coil portion 311C formed on the first main surface of the base sheet 30 as viewed from the first main surface side of the base sheet, and FIG. These are the figures which looked through the radiation
  • the winding directions of the radiation coil portion 311R and the radiation coil portion 312R of the antenna coil are opposite, and both are electromagnetically coupled.
  • the winding directions of the coupling coil portion 311C and the coupling coil portion 312C are opposite. Therefore, when a current flows through each conductor pattern, the current flows in the same direction in plan view.
  • a two-layer (or more) stacked antenna coil can be formed without forming a bridge pattern or a via conductor, and an LC resonance circuit can be configured with only the antenna coil.
  • the ferrite sheet 32 covers the radiation coil portions 311R and 312R. Below the ferrite sheet 32 (on the side opposite to the radiation coil portions 311R and 312R), the ground electrode GND of the printed wiring board 22, a surface mount component (not shown) mounted on the printed wiring board 22, and a battery pack Metal objects (not shown) such as metal covers may be provided, but the ferrite sheet 32 shields the magnetic flux to be linked to the metal objects, so that eddy currents are generated in the metal objects. Therefore, the influence of metal objects on the radiation characteristics of the antenna coil can be minimized.
  • the booster antenna 301 is attached to the inner surface of the housing 41 through an adhesive layer 33 made of an adhesive.
  • a printed wiring board 13 is provided inside the card type device 10, and a feeding coil 12 is formed on the printed wiring board 13. Further, the RFIC 11 is mounted on the printed wiring board 13.
  • FIG. 5A is a perspective view showing a positional relationship between the slot case 21 and the coupling coil portion 31C.
  • FIG. 5B is a plan view thereof.
  • the coupling coil portion 31C is composed of two (two layers) coupling coil portions 311C and 312C.
  • the coupling coil portions 311C and 312C are arranged so as to circulate around the opening 21A at a position close to the opening 21A of the slot case 21.
  • the entire opening 21A of the slot case 21 overlaps with the coil opening of the coupling coil portion 31C in plan view, but may partially overlap. That is, it is sufficient that at least a part of them overlap.
  • FIGS. 5A and 5B when the entire opening 21A of the slot case 21 overlaps the coil opening of the coupling coil portion 31C, the coupling coil portion 31C and the slot case 21 are overlapped. The degree of binding with increases.
  • FIG. 6A is a diagram showing a state of coupling between the communication terminal apparatus 101 and the communication partner antenna.
  • FIG. 6B is a diagram illustrating a state of coupling of the power supply coil, the slot case, and the coupling coil unit of the card type device 10.
  • FIG. 7 is a diagram showing a state of coupling with the feeding coil, slot case, and coupling coil portion of the card type device 10, which is different from FIG. 6 (B).
  • FIG. 8 is an equivalent circuit diagram of the communication terminal apparatus 101 according to the first embodiment in which the card type device 10 is mounted.
  • the magnetic flux MF3 is linked to the radiation coil portion 31R and the coupling coil portion 31C (mainly the radiation coil portion 31R) of the booster antenna 301.
  • the booster antenna 301 is electromagnetically coupled (mainly magnetic field coupled) with the communication partner antenna. Since the ferrite sheet 32 is behind the radiation coil portion 31R, the magnetic flux MF3 is transmitted between the radiation coil portion 31R and the ferrite sheet 32.
  • a coupling region CF1 indicates a coupling region between the feeding coil 12 and the slot case 21 in the card type device 10.
  • the feeding coil 12 and the slot case 21 are electromagnetically coupled (mainly magnetic field coupling).
  • a coupling region CF ⁇ b> 2 indicates a coupling region between the coupling coil portion 31 ⁇ / b> C of the booster antenna 301 and the slot case 21.
  • CF2 does not represent a magnetic flux loop.
  • the coupling coil portion 31C and the slot case 21 are electromagnetically coupled (mainly coupled by a magnetic field caused by a current flowing around the opening 21A of the slot case 21).
  • the coupling coil portion 31C When the coupling coil portion 31C is arranged so as to go around the periphery of the opening 21A at a position close to the opening 21A of the slot case 21, the periphery of the opening 21A of the slot case 21 and the coil opening of the coupling coil portion 31C Are close to each other at the shortest distance, and the magnetic flux passing through each opening is substantially linear. Therefore, the magnetic flux can be formed smoothly, and the degree of coupling between the slot case 21 and the coupling coil portion 31C can be improved.
  • the coil opening of the feeding coil 12, the opening 21A of the slot case 21, and the coil opening of the coupling coil part 31C overlap at least partially.
  • the coil opening of the coupling coil portion 31C, the opening portion 21A of the slot case 21, and the coil opening of the coupling coil portion 31C are connected with the shortest distance, and the magnetic flux passing through each opening is substantially linear. Therefore, the formation of the magnetic flux becomes smooth, and the coupling degree of the feeding coil 12, the slot case 21, and the coupling coil portion 31C can be further improved.
  • FIG. 7 is a diagram showing a state of coupling with the feeding coil, the slot case, and the coupling coil portion of the card type device 10, which is different from the example shown in FIG. 6 (B).
  • the coupling coil portion 31C is arranged so as to go around the opening 21A at a position close to the opening 21A of the slot case 21, but in the example shown in FIG.
  • the outer periphery of the slot case 21 and the formation region of the coupling coil portion 31C are arranged so that at least a part thereof overlaps in plan view.
  • the slot case 21 and the coupling coil portion 31C are electromagnetically coupled (mainly by the magnetic field generated by the current flowing through the outer periphery of the slot case 21). Magnetic field coupling). Thereby, the coupling degree of the slot case 21 and the coupling coil part 31C can be improved.
  • inductors L1 and L2 represent inductances by the coupling coil portions 311C and 312C by symbols
  • inductors L3 and L4 represent inductances by the radiation coil portions 311R and 312R by symbols.
  • the coupling at the coupling coil portion is represented by the symbol M1.
  • the coupling at the radiation coil portion is represented by the symbol M2.
  • Capacitors C1 and C2 represent the capacitance generated between the first antenna coil (coupling coil portion 311C and radiation coil portion 311R) and the second antenna coil (coupling coil portion 312C and radiation coil portion 312R) with a lumped constant symbol. Is.
  • the antenna coil 31 forms an LC circuit.
  • the inductor Lb represents the inductance generated in the path of the current flowing in the slot case 21 by a symbol
  • the capacitor Cb is a capacitance generated in the slit portion 21S portion of the slot case 21.
  • the inductor Lb and the capacitor Cb constitute an LC resonance circuit.
  • the coupling between the inductor Lb and the inductor L1 is represented by the symbol Mb-1. Further, the coupling between the inductor Lb and the inductor L2 is represented by the symbol Mb-2.
  • the inductor La represents the inductance by the power supply coil 12 of the card type device 10 as a symbol.
  • the capacitor CIC represents a capacitance connected to the feeding coil 12 such as a parasitic capacitance of the RFIC 11 by a symbol.
  • the inductor La and the capacitor CIC resonate with each other.
  • the RFIC 11 is coupled with the LC circuit by the slot case 21 in an impedance matching state.
  • the coupling between the inductor La and the inductor Lb of the slot case 21 is represented by Ma-b.
  • the communication partner side antenna ⁇ radiation coil portion 31R ⁇ coupling coil portion 31C ⁇ slot case 21 ⁇ feeding coil 12 in the card type device 10 ⁇ RFIC 11 or the reverse order is coupled.
  • high frequency power and high frequency signals are transmitted.
  • double resonance may be generated between the resonance circuit using the antenna coil 31 and the resonance circuit using the slot case.
  • the double resonance is used to increase the efficiency of energy transfer between the feeding coil 12 and the slot case 21 in the card type device 10 and energy transfer between the antenna coil 31 and the slot case 21.
  • it may be used for broadening the bandwidth.
  • the card type device 10 has a communication function such as RFID without using the input / output terminals of the card type device 10.
  • a communication function such as RFID
  • high-frequency power can be efficiently transmitted from the feeding coil 12 of the card type device 10 to the antenna coil 31 of the communication terminal device main body, and the strength and durability can be improved. It is possible to obtain a communication terminal apparatus that is excellent in communication characteristics.
  • FIG. 9 is a perspective view showing a main configuration inside the housing of the communication terminal device of the second embodiment.
  • a metal slot case 21 is attached to the printed wiring board 22.
  • the slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22.
  • a terminal On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided.
  • the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
  • the antenna coil 31 includes a radiation coil portion 31R and a coupling coil portion 31C, and the coupling coil portion 31C is close to the slot case 21.
  • the configuration of the antenna coil 31 is the same as that shown in the first embodiment.
  • the antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing, for example.
  • FIG. 10 is a diagram illustrating a configuration of the slot case 21 provided in the housing of the communication terminal device according to the second embodiment.
  • the slot case 21 has an opening 21A provided at a portion facing the coil opening of the power feeding coil 12 in the card type device 10 shown in FIG. 9, and a slit 21S that connects the opening 21A and the outer edge of the slot case 21. It has.
  • the position of the opening 21A of the slot case 21 may be determined according to the position of the feeding coil 12 in the card type device 10. Further, the slit portion 21S may be provided at a position where the distance between the opening 21A and the outer edge of the slot case 21 is short. As a result, the ratio of the slit portions 21S that do not directly contribute to the coupling can be reduced, and the mechanical strength can be ensured.
  • FIG. 11 is a perspective view illustrating a main configuration inside the housing of the communication terminal device according to the third embodiment.
  • FIG. 12 is a diagram showing a configuration of an antenna coil provided in the casing.
  • FIG. 13 is an equivalent circuit diagram of the antenna coil.
  • FIG. 14 is a diagram showing a positional relationship between the slot case and the antenna coil.
  • a metal slot case 21 is attached to the printed wiring board 22.
  • the slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22.
  • a terminal On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided.
  • the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
  • the antenna coil 31 includes an upper layer antenna coil 311 and a lower layer antenna coil 312. Specifically, the antenna coil 311 is formed on the first main surface of the base sheet, and the antenna coil 312 is formed on the second main surface of the base sheet.
  • the antenna coils 311 and 312 are formed in a rectangular spiral shape, and the winding directions of the antenna coil 311 and the antenna coil 312 are opposite, and both are electromagnetically coupled. Unlike the antenna coils shown in the first and second embodiments, there is no distinction between a radiating coil portion and a coupling coil portion, the entire antenna coil 31 acts as a radiating coil, and a part acts as a coupling coil. .
  • the antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the casing.
  • FIG. 13 is an equivalent circuit diagram of the antenna coil 31.
  • inductors L1 and L2 represent the inductances of the antenna coils 311 and 312 by symbols.
  • the coupling between the antenna coils 311 and 312 is represented by the symbol M.
  • Capacitors C1 and C2 represent the capacitance generated between the first antenna coil 311 and the second antenna coil 312 with a lumped constant symbol.
  • the antenna coil 31 forms an LC circuit.
  • the antenna coil 31 is arranged so that the corners of the rectangular spiral coil are along two sides of the outer periphery of the slot case 21. Since current flows along the outer periphery of the slot case 21, the slot case 21 and the antenna coil 31 are electromagnetically coupled (mainly magnetic field coupling).
  • the antenna coil 31 also functions as a radiating coil, and is also coupled to the communication partner antenna.
  • FIG. 15 is a perspective view showing the main configuration inside the housing of the communication terminal device of the fourth embodiment.
  • FIG. 16 shows a configuration of an antenna coil provided in the casing.
  • FIG. 17 is a diagram showing the positional relationship between the slot case and the antenna coil.
  • a metal slot case 21 is attached to the printed wiring board 22.
  • the slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22.
  • a terminal On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided.
  • the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
  • the antenna coil 31 includes an upper layer antenna coil 311 and a lower layer antenna coil 312.
  • the upper antenna coil 311 includes a coupling coil portion 311C and a radiation coil portion 311R.
  • the lower antenna coil 312 includes a coupling coil portion 312C and a radiation coil portion 312R.
  • the coupling coil portions 311C and 312C are formed inside the winding region of the radiation coil portions 311R and 312R.
  • the antenna coil 311 is formed on the first main surface of the base sheet
  • the antenna coil 312 is formed on the second main surface of the base sheet.
  • the antenna coils 311 and 312 are formed in a rectangular spiral shape, and the winding directions of the radiation coil portion 311R and the radiation coil portion 312R of the antenna coil are opposite, and both are electromagnetically coupled. Similarly, the winding directions of the coupling coil portion 311C and the coupling coil portion 312C are opposite, and both are electromagnetically coupled.
  • the antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing, for example.
  • the coupling coil portions 311C and 312C of the antenna coil are arranged so as to circulate around the opening 21A at a position close to the opening 21A of the slot case 21.
  • FIG. 17 only the pattern of the upper radiation coil part 311R and the coupling coil part 311C of the antenna coil is shown.
  • the way of coupling the slot case 21 and the coupling coil portions 311C and 312C is as described in the first embodiment.
  • the coupling coil portions 311C and 312C may be disposed inside the circulation range of the radiation coil portions 311R and 312R. As a result, the coupling coil portions 311C and 312C effectively contribute to radiation (that is, coupling with the communication partner antenna).
  • FIG. 18 is a cross-sectional view of a main part of the communication terminal device 105 according to the fifth embodiment.
  • a booster antenna 301 is attached to the inner surface of the back surface RF of the housing 41.
  • the configuration of the booster antenna 301 is the same as that shown in the first embodiment.
  • the position of the slot case 21 and the card type device 10 is different from the communication terminal apparatus shown in FIG. 3 in the first embodiment.
  • the slot case 21 is provided on the opposite side of the booster antenna 301 with the printed wiring board 22 interposed therebetween.
  • the configurations of the slot case 21 and the card type device 10 are the same as those shown in the first embodiment.
  • the “extraction area” VOG is formed in the ground electrode GND so that no conductor pattern exists between the slot case 21 and the card type device 10 and the coupling coil portions 311C and 312C of the booster antenna 301.
  • the slot case 21 is electromagnetically coupled to the feeding coil of the card-type device 10, and the slot case 21 is electromagnetically coupled to the coupling coil portions 311C and 312C of the antenna coil.
  • the sixth embodiment is different from the first to fifth embodiments in the direction of the coil axis of the feeding coil of the card type device.
  • differences from the configurations shown in the first to fifth embodiments will be described.
  • FIG. 19 is a diagram illustrating a configuration of the communication terminal apparatus 106 according to the sixth embodiment.
  • 19A is an external perspective view of the communication terminal device 106
  • FIG. 19B is a perspective view showing a main configuration inside the housing of the communication terminal device 106.
  • FIG. 19A is an external perspective view of the communication terminal device 106
  • FIG. 19B is a perspective view showing a main configuration inside the housing of the communication terminal device 106.
  • the housing 41 of the communication terminal device 106 includes a card slot 42 into which the card type device 10 is inserted and removed.
  • An antenna coil 31 is provided inside the housing 41.
  • An RFIC and a feeding coil 12 described later are provided inside the card type device 10. Further, a plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
  • the printed wiring board 22 is provided with a card mounting portion 20.
  • the card mounting unit 20 includes a metal member 23.
  • the metal member 23 is mounted on a mounting land on the printed wiring board 22 by soldering or the like.
  • the metal member 23 constitutes a space in which the card type device 10 can be attached and detached between the metal member 23 and the printed wiring board 22.
  • a terminal is provided on the surface of the printed wiring board 22 to which the metal member 23 is opposed, in which the electrode of the card type device 10 comes into contact and is electrically connected.
  • FIG. 20 is a diagram showing a configuration in the vicinity of the card mounting unit 20.
  • FIG. 20A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and
  • FIG. 20B is a plan view of the vicinity of the card mounting portion 20.
  • FIG. 20C is a diagram showing a state of coupling between the metal member of the card mounting portion and the feeding coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. It is.
  • the card type device 10 has a feeding coil 12 having a coil axis in the insertion direction.
  • the RFIC 11 is connected to both ends of the feeding coil 12.
  • the card mounting portion 20 is composed of, for example, a metal member 23 made of stainless steel and a conductor pattern 24 formed on the printed wiring board 22.
  • the conductor pattern 24 is formed on the upper surface, lower surface or inner layer of the printed wiring board 22.
  • the metal member 23 and the conductor pattern 24 constitute a coiled coupling conductor.
  • a capacitor Co is connected to the coiled coupling conductor. That is, an LC resonance circuit is configured by the coil-shaped coupling conductor and the capacitor Co.
  • a space for inserting and mounting the card type device 10 is formed between the metal member 23 and the printed wiring board 22.
  • the coil axis of the feeding coil 12 of the card type device 10 is substantially coaxial with the coil axis of the coil formed by the coiled coupling conductor of the card mounting unit 20. Therefore, the feeding coil 12 of the card type device 10 is electromagnetically coupled to the coiled coupling conductor of the card mounting unit 20.
  • the magnetic flux ⁇ 1 represents a magnetic flux that links both the power supply coil 12 of the card-type device 10 and the coiled coupling conductor of the card mounting portion 20.
  • a coupling coil portion 31C of the antenna coil is disposed in the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed.
  • the coupling coil portion 31C of the antenna coil is close to a position that does not completely overlap with the metal member 23 of the card mounting portion 20 in plan view. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20.
  • the magnetic flux ⁇ 2 represents the magnetic flux that links both the coupling coil portion 31C of the antenna coil and the coiled coupling conductor of the card mounting portion 20.
  • the seventh embodiment is different from the first to sixth embodiments in the structure of the card mounting portion. Hereinafter, differences from the configurations shown in the first to sixth embodiments will be described.
  • FIG. 21 is a diagram illustrating a configuration of the communication terminal device 107 according to the seventh embodiment.
  • FIG. 21A is an external perspective view of the communication terminal device 107
  • FIG. 21B is a perspective view showing a main configuration inside the housing of the communication terminal device 107.
  • the housing 41 of the communication terminal device 107 is provided with a card slot 42 into which the card type device 10 is inserted and removed.
  • An antenna coil 31 is provided inside the housing 41.
  • An RFIC and a feeding coil 12 described later are provided inside the card-type device 10. Further, a plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
  • the printed wiring board 22 is provided with a card mounting portion 20.
  • the card mounting unit 20 includes a metal member 23.
  • the metal member 23 forms a space in which the card type device 10 can be attached and detached between the metal member 23 and the printed wiring board 22.
  • a terminal is provided on the surface of the printed wiring board 22 to which the metal member 23 is opposed, in which the electrode of the card type device 10 comes into contact and is electrically connected.
  • FIG. 22 is a diagram showing a configuration in the vicinity of the card mounting unit 20.
  • 22A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22
  • FIG. 22B is a plan view of the vicinity of the card mounting portion 20.
  • FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil.
  • FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil.
  • the card type device 10 is formed with a feeding coil 12 having a plane parallel to the plane as a coil opening surface.
  • the RFIC 11 is connected to both ends of the feeding coil 12.
  • the card mounting portion 20 is composed of, for example, a metal member 23 made of stainless steel and a conductor pattern 24 formed on the printed wiring board 22.
  • the metal member 23 and the conductor pattern 24 constitute a coiled coupling conductor.
  • a capacitor Co is connected to the coiled coupling conductor. That is, an LC resonance circuit is configured by the coil-shaped coupling conductor and the capacitor Co.
  • a space for inserting and mounting the card type device 10 is formed between the metal member 23 and the printed wiring board 22.
  • the feeding coil 12 of the card type device 10 is electromagnetically coupled to the coiled coupling conductor of the card mounting unit 20 (see FIG. 22C).
  • a coupling coil portion 31C of the antenna coil is disposed in the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed.
  • the coil opening of the feeding coil 12 of the card type device 10 is arranged so as to overlap the coil opening of the coiled coupling conductor of the card mounting unit 20. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20.
  • the magnetic flux ⁇ 1 represents a magnetic flux that links both the feeding coil 12 of the card type device 10 and the coiled coupling conductor of the card mounting portion 20.
  • a coupling coil portion 31C of the antenna coil is disposed in the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed.
  • the coil opening of the coupling coil portion 31C of the antenna coil overlaps the coil opening of the coil by the coiled coupling conductor of the card mounting portion 20 in plan view. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20.
  • the magnetic flux ⁇ 2 represents a magnetic flux that links both the coupling coil portion 31C of the antenna coil and the coiled coupling conductor of the card mounting portion 20.
  • the slot case 21 is provided on the printed wiring board 22 inside the housing 41, and the card type device 10 is detachably provided on the slot case 21, but the slot case is provided on the outer surface of the housing.
  • the card type device 10 may be provided so as to be mounted outside the casing of the communication terminal device.
  • the antenna coil is configured as a laminated antenna coil including two layers of antenna coils.
  • the antenna coil is configured by a single coupling coil unit and a radiation coil unit. Also good.
  • the antenna coil may be configured with only a single radiation coil portion without providing the coupling coil independently.
  • a capacitor may be connected to the antenna coil. That is, the resonance frequency may be determined by the inductance of the antenna coil and the capacitance of the capacitor.
  • the antenna coil may be a laminated antenna coil having a conductor pattern of three or more layers.
  • the antenna coil may be provided integrally with the casing by forming a conductor pattern on the resin casing.
  • the antenna coil is not limited to one having a large-diameter coil portion (radiating coil portion) and a small-diameter coil portion (coupled coil portion), and one large coil formed by winding a loop-shaped conductor for one turn or more.
  • An area antenna coil may be used.
  • the slot case only needs to be close to a part of the antenna coil.
  • the slot case is not limited to the type having the insertion opening on the side surface of the terminal housing.
  • the slot case is a slot case (a type often used for a slot for a SIM card) arranged inside the terminal housing. Can be applied similarly.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
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Abstract

The inside of a card type device (10) is furnished with an RFIC and a power supply coil (12). A slot case (21) made of metal and having an opening and a slit is mounted onto a printed circuit board (22). By inserting the card type device (10) into the card slot (42), an electrode of the card type device (10) is electrically connected to a terminal of the printed circuit board (22). The antenna coil (31) is equipped with an emitter coil part (31R) and a coupling coil part (31C), the coupling coil part (31C) being in proximity to the slot case (21). Communication is thereby possible through coupling in the order: antenna of communication partner → emitter coil part (31R) → coupling coil part (31C) → slot case (21) → power supply coil (12) in the card type device (10), or in the reverse order.

Description

電子機器Electronics
　本発明は、相手側機器と電磁界信号を介して通信するＲＦＩＤ（Radio Frequency Identification）システムや近距離無線通信（NFC：Near Field Communication）システムに用いられる電子機器に関するものである。 The present invention relates to an electronic device used in an RFID (Radio Frequency Identification) system or a near field communication (NFC) system that communicates with a counterpart device via an electromagnetic field signal.
　ＮＦＣは、ＲＦＩＤシステムを利用した無線通信規格の一つで、携帯電話端末をはじめ、さまざまな端末装置への搭載が期待されている。ＮＦＣでは１３ＭＨｚ帯（ＨＦ帯）の無線信号が利用されている。通常、ＨＦ帯ＲＦＩＤシステムを利用した通信端末装置では、リーダライタ機能やタグ機能をつかさどるＲＦＩＣ（Radio Frequency Integrated Circuit）チップが端末本体に内蔵され、このＲＦＩＣチップは同じく端末本体に内蔵されたアンテナコイルに接続される。 NFC is one of the wireless communication standards using the RFID system, and is expected to be installed in various terminal devices including mobile phone terminals. In NFC, radio signals in the 13 MHz band (HF band) are used. Normally, in a communication terminal device using an HF band RFID system, an RFIC (Radio Frequency つ か Integrated Circuit) chip that controls a reader / writer function and a tag function is built in the terminal body, and this RFIC chip is also an antenna coil built in the terminal body. Connected to.
　これに対して、例えば特許文献１において、取り外し可能なカード型デバイス内にＲＦＩＣチップを設け、端末本体側のアンテナコイルを利用して、通信相手側アンテナとの無線通信を行う構成が示されている。この構成では、カード型デバイスにコイルを設けておき、このコイルを端末本体側のアンテナコイルと電磁結合させることにより、ＲＦＩＣチップと端末本体側アンテナコイルとを電気的に接続させている。この構成によれば、カード型デバイスが本来有している入出力端子を利用することなく、ＳＤメモリーカード等のカード型デバイスにＲＦＩＤ機能を付加できる。 On the other hand, for example, Patent Document 1 discloses a configuration in which an RFIC chip is provided in a removable card type device and wireless communication with a communication partner antenna is performed using an antenna coil on the terminal body side. Yes. In this configuration, a coil is provided in the card-type device, and this coil is electromagnetically coupled to the antenna coil on the terminal body side, thereby electrically connecting the RFIC chip and the terminal body side antenna coil. According to this configuration, an RFID function can be added to a card type device such as an SD memory card without using an input / output terminal that the card type device originally has.
特開２００４－５６４１３号公報JP 2004-56413 A
　ＳＤメモリーカード等のカード型デバイスを利用する、通信端末装置を含む各種電子機器には、カード型デバイスを挿入するためのスロットケースを備えている。このスロットケースは、強度や耐久性が要求されることから、金属体で構成されている。金属体はアンテナ（コイル）の磁束の通過を妨げるため、カード型デバイス側のコイルと電子機器側のアンテナコイルとを高い結合度で電磁結合させることは難しい、という課題があった。 Various electronic devices including a communication terminal device using a card type device such as an SD memory card have a slot case for inserting the card type device. Since the slot case is required for strength and durability, the slot case is made of a metal body. Since the metal body hinders the passage of magnetic flux of the antenna (coil), there is a problem that it is difficult to electromagnetically couple the coil on the card-type device side and the antenna coil on the electronic device side with a high degree of coupling.
　本発明はカード型デバイスに設けられたコイルと電子機器外部の通信相手機器とを強く結合させることのできる電子機器を提供することを目的としている。 An object of the present invention is to provide an electronic device capable of strongly coupling a coil provided in a card-type device and a communication counterpart device outside the electronic device.
　前記課題を解決するために、本発明の電子機器は次のように構成される。 In order to solve the above problems, the electronic apparatus of the present invention is configured as follows.
（１）給電コイルを有するカード型デバイスが着脱可能に構成されたカード装着部と、アンテナコイルと、を備え、
　前記カード装着部は、前記カード型デバイスの給電コイルおよび前記アンテナコイルと電磁界結合する結合導体を備えたことを特徴とする。 (1) A card mounting unit configured to be detachable from a card-type device having a feeding coil, and an antenna coil.
The card mounting portion includes a coupling conductor that electromagnetically couples to the feeding coil and the antenna coil of the card type device.
（２）前記カード型デバイスの給電コイルは、カード型デバイスの平面に平行な面がコイル開口面であり、前記カード装着部の結合導体は、前記給電コイルのコイル開口と対向（対面）する部分に設けられた開口部、および、前記開口部と前記カード装着部の外縁とを結ぶスリット部を有することが好ましい。 (2) In the power supply coil of the card type device, a plane parallel to the plane of the card type device is a coil opening surface, and the coupling conductor of the card mounting portion is a portion facing (facing) the coil opening of the power supply coil. It is preferable to have an opening provided in the slit and a slit connecting the opening and the outer edge of the card mounting portion.
（３）前記カード装着部は複数の辺を有する天面と、前記複数の辺のうち少なくとも２辺にそれぞれ連接した２つの側面とを備え、前記天面に前記カード装着部の開口部および前記スリット部が設けられていて、前記側面のうち、前記カード型デバイスの挿入口が設けられている側面とは異なる側面に開口部が設けられていることが好ましい。 (3) The card mounting portion includes a top surface having a plurality of sides and two side surfaces respectively connected to at least two sides of the plurality of sides, and the top surface includes the opening of the card mounting portion and the top surface. It is preferable that a slit portion is provided and an opening is provided on a side surface different from the side surface on which the insertion port of the card type device is provided.
（４）前記カード型デバイスの給電コイルは、カード型デバイスの平面に平行な面がコイル開口面であり、前記カード装着部の結合導体は、回路基板に形成された導体パターンおよび前記回路基板に取り付けられた金属部材を備え、前記導体パターンおよび前記金属部材で、前記カード型デバイスの平面に平行な面をコイル開口面とするコイルを構成していることが好ましい。 (4) In the feeding coil of the card type device, a plane parallel to the plane of the card type device is a coil opening surface, and the coupling conductor of the card mounting portion is a conductor pattern formed on the circuit board and the circuit board. It is preferable that a coil including an attached metal member and having a plane parallel to the plane of the card-type device as a coil opening surface is configured by the conductor pattern and the metal member.
（５）平面視で、前記給電コイルのコイル開口は前記カード装着部の結合導体の開口部に対して少なくとも一部が重なっていることが好ましい。 (5) In plan view, it is preferable that at least a part of the coil opening of the feeding coil overlaps the opening of the coupling conductor of the card mounting portion.
（６）前記カード型デバイスの給電コイルは、カード型デバイスの挿入方向（カード型デバイスの平面に平行な一つの軸）にコイル軸を有し、前記カード装着部の結合導体は、回路基板に形成された導体パターンおよび前記回路基板に取り付けられた金属部材を備え、前記導体パターンおよび前記金属部材で、前記カード型デバイスの挿入方向をコイル軸とするコイルを構成していることが好ましい。 (6) The feeding coil of the card-type device has a coil axis in the insertion direction of the card-type device (one axis parallel to the plane of the card-type device), and the coupling conductor of the card mounting portion is attached to the circuit board. It is preferable that a metal member attached to the formed conductor pattern and the circuit board is provided, and the conductor pattern and the metal member constitute a coil having the insertion direction of the card type device as a coil axis.
（７）平面視で、前記アンテナコイルは前記カード装着部の結合導体の外周に対して少なくとも一部が重なっていることが好ましい。 (7) It is preferable that at least a part of the antenna coil overlaps with the outer periphery of the coupling conductor of the card mounting portion in plan view.
（８）前記アンテナコイルは、前記カード装着部の結合導体と結合する結合コイル部とこの結合コイル部よりコイル径が大きな放射コイル部とを含むことが好ましい。 (8) It is preferable that the antenna coil includes a coupling coil unit coupled to a coupling conductor of the card mounting unit and a radiation coil unit having a coil diameter larger than that of the coupling coil unit.
（９）平面視で、前記アンテナコイルの結合コイル部は前記カード装着部の結合導体の開口部の周囲を周回するように配置されていることが好ましい。 (9) It is preferable that the coupling coil portion of the antenna coil is arranged so as to go around the opening of the coupling conductor of the card mounting portion in plan view.
（１０）前記アンテナコイルは、異なる層に形成された、互いに対向する第１アンテナコイルおよび第２アンテナコイルを含み、前記第１アンテナコイルと前記第２アンテナコイルとは容量を介して互いに結合されていて、前記カード装着部の結合導体との結合により流れる電流が同じ向きであることが好ましい。 (10) The antenna coil includes a first antenna coil and a second antenna coil that are formed on different layers and face each other, and the first antenna coil and the second antenna coil are coupled to each other via a capacitor. It is preferable that the currents flowing due to the coupling with the coupling conductor of the card mounting portion are in the same direction.
　本発明の電子機器によれば、カード型デバイスの給電コイルとスロットケースとが電磁界結合し、さらにスロットケースとアンテナコイルとが電磁界結合することにより、カード型デバイス内のＲＦＩＣチップから給電コイルおよびスロットケースを介してアンテナコイルに高周波電力が伝達される。したがって、カード型デバイスが本来有している入出力端子を利用することなく、カード型デバイスにＲＦＩＤ等の通信機能を付加できる。特に、金属製のスロットケースを用いているにもかかわらず、カード型デバイスの給電コイルから端末本体のアンテナコイルに効率良く高周波電力を伝達させることができ、強度や耐久性に優れ、かつ、通信特性にも優れた通信端末装置を得ることができる。 According to the electronic apparatus of the present invention, the feeding coil and the slot case of the card type device are electromagnetically coupled, and the slot case and the antenna coil are electromagnetically coupled, so that the feeding coil is fed from the RFIC chip in the card type device. In addition, high frequency power is transmitted to the antenna coil through the slot case. Accordingly, it is possible to add a communication function such as RFID to the card type device without using the input / output terminals that the card type device originally has. In particular, despite the use of a metal slot case, high-frequency power can be efficiently transmitted from the power supply coil of the card-type device to the antenna coil of the terminal body, which is excellent in strength and durability, and communication. A communication terminal device having excellent characteristics can be obtained.
図１は第１の実施形態の通信端末装置１０１の構成を示す斜視図である。FIG. 1 is a perspective view showing a configuration of a communication terminal apparatus 101 according to the first embodiment. 図２（Ａ）はプリント配線板２２に対するスロットケース２１の取り付け部の斜視図、図２（Ｂ）は給電コイル１２の形状を示す図、図２（Ｃ）はスロットケース２１と給電コイル１２との平面上の関係を示す図である。2A is a perspective view of a mounting portion of the slot case 21 with respect to the printed wiring board 22, FIG. 2B is a diagram illustrating the shape of the power feeding coil 12, and FIG. 2C is a diagram illustrating the slot case 21, the power feeding coil 12, and the like. It is a figure which shows the relationship on a plane. 図３（Ａ）は通信端末装置１０１の主要部の断面図、図３（Ｂ）はその部分拡大図である。3A is a cross-sectional view of the main part of the communication terminal apparatus 101, and FIG. 3B is a partially enlarged view thereof. 図４（Ａ）はブースターアンテナ３０１が貼付された筐体４１の内面を示す図である。図４（Ｂ）は基材シート３０の第１主面に形成された放射コイル部３１１Ｒおよび結合コイル部３１１Ｃを基材シートの第１主面側から見た図であり、図４（Ｃ）は基材シート３０の第２主面に形成された放射コイル部３１２Ｒおよび結合コイル部３１２Ｃを基材シートの第１主面側から透視した図である。FIG. 4A is a diagram showing the inner surface of the housing 41 to which the booster antenna 301 is attached. FIG. 4B is a view of the radiation coil portion 311R and the coupling coil portion 311C formed on the first main surface of the base sheet 30 as viewed from the first main surface side of the base sheet, and FIG. These are the figures which looked through the radiation | emission coil part 312R and the coupling coil part 312C which were formed in the 2nd main surface of the base material sheet 30 from the 1st main surface side of the base material sheet. 図５（Ａ）はスロットケース２１と結合コイル部３１Ｃとの位置関係を示す斜視図である。図５（Ｂ）はスロットケース２１と結合コイル部３１Ｃとの位置関係を示す平面図である。FIG. 5A is a perspective view showing the positional relationship between the slot case 21 and the coupling coil portion 31C. FIG. 5B is a plan view showing the positional relationship between the slot case 21 and the coupling coil portion 31C. 図６（Ａ）は通信端末装置１０１と通信相手側アンテナとの結合の様子を示す図である。図６（Ｂ）はカード型デバイス１０の給電コイル、スロットケースおよび結合コイル部との結合の様子を示す図である。FIG. 6A is a diagram showing a state of coupling between the communication terminal apparatus 101 and the communication partner antenna. FIG. 6B is a diagram illustrating a state of coupling of the power supply coil, the slot case, and the coupling coil unit of the card type device 10. 図７はカード型デバイス１０の給電コイル、スロットケースおよび結合コイル部との結合の様子を示す図である。FIG. 7 is a view showing a state of coupling with the feeding coil, slot case, and coupling coil portion of the card type device 10. 図８は、カード型デバイス１０が装着された、第１の実施形態の通信端末装置１０１の等価回路図である。FIG. 8 is an equivalent circuit diagram of the communication terminal apparatus 101 according to the first embodiment in which the card type device 10 is mounted. 図９は第２の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。FIG. 9 is a perspective view showing a main configuration inside the housing of the communication terminal device of the second embodiment. 図１０は第２の実施形態の通信端末装置の筐体に設けられているスロットケース２１の構成を示す図である。FIG. 10 is a diagram illustrating a configuration of the slot case 21 provided in the housing of the communication terminal device according to the second embodiment. 図１１は第３の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。FIG. 11 is a perspective view illustrating a main configuration inside the housing of the communication terminal device according to the third embodiment. 図１２は第３の実施形態の通信端末装置の筐体内に設けられているアンテナコイルの構成を示す図である。FIG. 12 is a diagram illustrating a configuration of an antenna coil provided in the housing of the communication terminal device according to the third embodiment. 図１３は第３の実施形態の通信端末装置の筐体内に設けられているアンテナコイルの等価回路図である。FIG. 13 is an equivalent circuit diagram of an antenna coil provided in the housing of the communication terminal device according to the third embodiment. 図１４は第３の実施形態の通信端末装置の筐体内に設けられているスロットケースとアンテナコイルとの位置関係を示す図である。FIG. 14 is a diagram illustrating a positional relationship between a slot case and an antenna coil provided in the housing of the communication terminal device according to the third embodiment. 図１５は第４の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。FIG. 15 is a perspective view showing the main configuration inside the housing of the communication terminal device of the fourth embodiment. 図１６は第４の実施形態の通信端末装置の筐体内に設けられているアンテナコイルの構成を示すである。FIG. 16 shows the configuration of the antenna coil provided in the housing of the communication terminal device of the fourth embodiment. 図１７は第４の実施形態の通信端末装置の筐体内に設けられているスロットケースとアンテナコイルとの位置関係を示す図である。FIG. 17 is a diagram illustrating a positional relationship between a slot case and an antenna coil provided in the housing of the communication terminal device according to the fourth embodiment. 図１８は第５の実施形態の通信端末装置１０５の主要部の断面図である。FIG. 18 is a cross-sectional view of a main part of the communication terminal device 105 according to the fifth embodiment. 図１９（Ａ）は通信端末装置１０６の外観斜視図、図１９（Ｂ）は通信端末装置１０６の筐体内部の主要な構成を示す斜視図である。FIG. 19A is an external perspective view of the communication terminal device 106, and FIG. 19B is a perspective view showing the main configuration inside the housing of the communication terminal device 106. 図２０（Ａ）はプリント配線板２２に対するカード装着部２０付近の斜視図、図２０（Ｂ）はカード装着部２０付近の平面図である。図２０（Ｃ）はカード装着部の金属部材とカード型デバイス１０の給電コイル１２との結合の様子、およびカード装着部の金属部材とアンテナコイルの結合コイル部３１Ｃとの結合の様子を示す図である。FIG. 20A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and FIG. 20B is a plan view of the vicinity of the card mounting portion 20. FIG. 20C is a diagram showing a state of coupling between the metal member of the card mounting portion and the feeding coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. It is. 図２１（Ａ）は通信端末装置１０７の外観斜視図、図２１（Ｂ）は通信端末装置１０７の筐体内部の主要な構成を示す斜視図である。FIG. 21A is an external perspective view of the communication terminal device 107, and FIG. 21B is a perspective view showing a main configuration inside the housing of the communication terminal device 107. 図２２（Ａ）はプリント配線板２２に対するカード装着部２０付近の斜視図、図２２（Ｂ）はカード装着部２０付近の平面図である。図２２（Ｃ）はカード装着部の金属部材２３とカード型デバイス１０の給電コイル１２との結合の様子、およびカード装着部の金属部材とアンテナコイルの結合コイル部３１Ｃとの結合の様子を示す図である。22A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and FIG. 22B is a plan view of the vicinity of the card mounting portion 20. FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. FIG.
《第１の実施形態》
　本発明の電子機器はカード型デバイスを利用する装置である。例えば携帯電話端末、ノートＰＣ、タブレットＰＣ、ハンディターミナル（データ収集端末）等の情報通信端末や、ディジタルスチルカメラ、ディジタルビデオカメラ、ディジタルオーディオレコーダー等の情報メディア機器等である。第１の実施形態では特に、ＮＦＣシステムに代表されるＨＦ帯のＲＦＩＤシステムを持った通信端末装置を例に挙げる。 << First Embodiment >>
The electronic apparatus of the present invention is an apparatus that uses a card-type device. For example, there are information communication terminals such as mobile phone terminals, notebook PCs, tablet PCs, handy terminals (data collection terminals), information media devices such as digital still cameras, digital video cameras, and digital audio recorders. In the first embodiment, a communication terminal apparatus having an HF band RFID system represented by an NFC system is taken as an example.
　図１は第１の実施形態の通信端末装置１０１の構成を示す斜視図である。図１（Ａ）は通信端末装置１０１の外観斜視図、図１（Ｂ）は通信端末装置１０１の筐体内部の主要な構成を示す斜視図である。 FIG. 1 is a perspective view showing the configuration of the communication terminal apparatus 101 according to the first embodiment. FIG. 1A is an external perspective view of the communication terminal apparatus 101, and FIG. 1B is a perspective view showing a main configuration inside the housing of the communication terminal apparatus 101.
　通信端末装置１０１の筐体４１は長手方向と短手方向とを有する矩形状の筺体であって、表面ＦＦ（一方主面）、裏面ＲＦ（他方主面）、および、表面ＦＦと裏面ＲＦとを連接する４つの側面を有する。この筐体４１は、スライド式端末や折り畳み式端末のように２つの筺体を連接したものであってもよいし、バータイプのものであってもよい。 The housing 41 of the communication terminal device 101 is a rectangular housing having a longitudinal direction and a short direction, and includes a front surface FF (one main surface), a back surface RF (the other main surface), and a front surface FF and a back surface RF. Are connected to each other. The housing 41 may be one in which two casings are connected like a sliding terminal or a folding terminal, or may be a bar type.
　通信端末装置１０１の筐体４１には、カード型デバイス１０を挿抜するカードスロット４２を備えている。筐体４１の内部にはアンテナコイル３１が設けられている。カード型デバイス１０の内部には後に示すＲＦＩＣおよび給電コイル１２が設けられている。また、このカード型デバイス１０の図１における下面には複数の電極が露出している。 The housing 41 of the communication terminal apparatus 101 includes a card slot 42 into which the card type device 10 is inserted and removed. An antenna coil 31 is provided inside the housing 41. An RFIC and a feeding coil 12 described later are provided inside the card type device 10. A plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
　カード型デバイス１０は、例えばＳＤ（Secure Digital）カード等のメモリーカードやＳＩＭ（Subscriber Identity Module）カードのように、端末本体への装着や取り外しが可能な小型のカード型デバイスであって、ＲＦＩＣとこのＲＦＩＣに接続された給電コイル１２とを有する。ＲＦＩＣは、ＲＦＩＤシステムに代表される通信システムにおけるフロントエンド回路を構成するものであって、ＲＦ回路、メモリー回路、ロジック回路等を有する半導体集積回路として構成されている。このＲＦＩＣは、基本的には、シリコン半導体素子として構成されていて、ベアチップであってもよいし、パッケージＩＣとして構成されていてもよい。給電コイル１２は、ＲＦＩＣの入出力端子が接続されたコイル素子であって、カード型デバイス１０の筺体内または筺体表面に設けられている。このコイル素子は、積層型のコイル素子であってもよいし、平面渦巻き状のコイル素子であってもよい。 The card-type device 10 is a small card-type device that can be attached to and detached from the terminal body, such as a memory card such as an SD (Secure Digital) card or a SIM (Subscriber Identity Module) card, The power supply coil 12 is connected to the RFIC. The RFIC constitutes a front-end circuit in a communication system represented by an RFID system, and is configured as a semiconductor integrated circuit having an RF circuit, a memory circuit, a logic circuit, and the like. The RFIC is basically configured as a silicon semiconductor element and may be a bare chip or a package IC. The feeding coil 12 is a coil element to which an input / output terminal of the RFIC is connected, and is provided on the casing or the casing surface of the card type device 10. This coil element may be a laminated coil element or a planar spiral coil element.
　プリント配線板２２には金属製のスロットケース２１が取り付けられている。このスロットケース２１は、本発明の「カード装着部」に相当する。スロットケース２１は、スロットケース２１とプリント配線板２２との間にカード型デバイス１０が着脱できる空間（スロット）を構成する。このスロットケース２１が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。カード型デバイス１０をカードスロット４２に挿入することにより、スロットケース２１にカード型デバイス１０が装着され、カード型デバイス１０の電極がプリント配線板２２の端子に電気的に接続される。 A metal slot case 21 is attached to the printed wiring board 22. The slot case 21 corresponds to the “card mounting portion” of the present invention. The slot case 21 forms a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22. On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided. By inserting the card type device 10 into the card slot 42, the card type device 10 is mounted in the slot case 21, and the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
　詳細は後に示すが、アンテナコイル３１は誘電体層を介して互いに対向する２層のアンテナコイルで構成されている。このアンテナコイル３１はブースターアンテナの一部であり、ブースターアンテナは筐体４１の内面に貼付されている。 Although details will be described later, the antenna coil 31 is composed of two layers of antenna coils facing each other through a dielectric layer. The antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing 41.
　アンテナコイル３１はそれぞれ電気的に接続された放射コイル部３１Ｒおよび結合コイル部３１Ｃを備えていて、結合コイル部３１Ｃはスロットケース２１に近接している。放射コイル部３１Ｒは結合コイル部３１Ｃよりコイル径が大きい。すなわち、放射コイル部３１Ｒにて、主に通信相手側のアンテナコイルとの無線通信を担い、結合コイル部３１Ｃにて、スロットケース２１との電磁界結合（主に磁界結合）を担うように構成されている。この場合、後に示すように、放射コイル部３１Ｒには、通信相手側アンテナに対面させる面（裏面ＲＦ）とは反対面側にフェライトシートのような磁性体層を設けることが好ましい。 The antenna coil 31 includes a radiation coil portion 31R and a coupling coil portion 31C that are electrically connected to each other, and the coupling coil portion 31C is close to the slot case 21. The radiation coil portion 31R has a larger coil diameter than the coupling coil portion 31C. That is, the radiation coil part 31R is mainly responsible for wireless communication with the antenna coil on the communication partner side, and the coupling coil part 31C is configured to be responsible for electromagnetic field coupling (mainly magnetic field coupling) with the slot case 21. Has been. In this case, as will be described later, it is preferable that the radiation coil portion 31R is provided with a magnetic layer such as a ferrite sheet on the side opposite to the surface (back surface RF) facing the communication partner antenna.
　なお、放射コイル部３１Ｒの面積（放射コイル部３１Ｒを構成するコイルパターンの最外パターンで囲まれるエリア）は結合コイル部３１Ｃの面積（結合コイル部３１Ｃを構成するコイルパターンの最外パターンで囲まれる）の２倍以上、さらには４倍以上であることが、端末筺体のサイズを有効に利用しつつ、放射特性を大きくできるという点で好ましい。 The area of the radiation coil portion 31R (the area surrounded by the outermost pattern of the coil pattern constituting the radiation coil portion 31R) is surrounded by the area of the coupling coil portion 31C (the outermost pattern of the coil pattern constituting the coupling coil portion 31C). 2) or more, and even 4 times or more of the above is preferable in that radiation characteristics can be increased while effectively using the size of the terminal housing.
　図２は前記スロットケース２１の構成およびスロットケース２１と給電コイル１２との関係を示す図である。図２（Ａ）はプリント配線板２２に対するスロットケース２１の取り付け部の斜視図、図２（Ｂ）は給電コイル１２の形状を示す図、図２（Ｃ）はスロットケース２１と給電コイル１２との平面上の関係を示す図である。 FIG. 2 is a diagram showing the configuration of the slot case 21 and the relationship between the slot case 21 and the feeding coil 12. 2A is a perspective view of a mounting portion of the slot case 21 with respect to the printed wiring board 22, FIG. 2B is a diagram illustrating the shape of the power feeding coil 12, and FIG. 2C is a diagram illustrating the slot case 21, the power feeding coil 12, and the like. It is a figure which shows the relationship on a plane.
　スロットケース２１は、ステンレス等の金属製部材で構成されているか、少なくとも一部が金属製部材で構成されている。スロットケース２１の金属部分には、給電コイル１２のコイル開口と対向する部分に設けられた開口部２１Ａ、および、開口部２１Ａとスロットケース２１の外縁とを結ぶスリット部２１Ｓを備えている。 The slot case 21 is made of a metal member such as stainless steel, or at least a part of the slot case 21 is made of a metal member. The metal portion of the slot case 21 is provided with an opening 21A provided at a portion facing the coil opening of the power feeding coil 12, and a slit portion 21S that connects the opening 21A and the outer edge of the slot case 21.
　なお、開口部２１Ａのサイズは任意であり、通常、開口部２１Ａの幅はスリット部２１Ｓの幅よりも大きい。 In addition, the size of the opening 21A is arbitrary, and the width of the opening 21A is usually larger than the width of the slit 21S.
　図２（Ｂ）に示すように給電コイル１２は矩形の渦巻き状のコイルである。給電コイル１２の両端にＲＦＩＣ１１が接続されている。スロットケース２１の開口部２１Ａは、給電コイル１２のコイル開口と対向する部分に設けられているので、カード型デバイス１０がスロットケース２１に装着されて、給電コイル１２がスロットケース２１に電磁気的に結合した状態で、図２（Ａ）に矢印で示すように、スロットケース２１に開口部２１Ａを周回するように電流が流れる。しかし、スロットケース２１には開口部１２Ａとスロットケース２１の外縁とを結ぶスリット部２１Ｓが形成されているので、スロットケース２１に渦電流が流れることなく、スリット部２１Ｓを経由してスロットケース２１の外縁に沿って電流が流れる。 As shown in FIG. 2B, the feeding coil 12 is a rectangular spiral coil. RFICs 11 are connected to both ends of the feeding coil 12. Since the opening 21 </ b> A of the slot case 21 is provided at a portion facing the coil opening of the power feeding coil 12, the card type device 10 is mounted on the slot case 21, and the power feeding coil 12 is electromagnetically attached to the slot case 21. In the coupled state, an electric current flows through the slot case 21 so as to go around the opening 21A as indicated by an arrow in FIG. However, since the slot case 21S is formed in the slot case 21 to connect the opening 12A and the outer edge of the slot case 21, eddy current does not flow through the slot case 21, and the slot case 21 passes through the slit part 21S. A current flows along the outer edge of the.
　スロットケース２１は複数の辺を有する天面と、複数の辺のうち少なくとも２辺にそれぞれ連接した２つの側面とを備え、天面にスロットケース２１の開口部２１Ａおよびスリット部２１Ｓが設けられていて、側面のうち、カード型デバイス１０の挿入口ＣＳが設けられている側面とは異なる側面に開口部ＳＳが設けられていることが好ましい。図２に示した例では、スロットケース２１は平面視で矩形状の天面とこの天面にそれぞれ連接された４つの側面を有し、カード型デバイス１０を挿入する側面に挿入口ＣＳ、残りの３つの側面に開口部ＳＳがそれぞれ設けられている。このようにスロットケース２１の側面が開口されていると、これらの開口部を通る磁束が円滑に形成され、給電コイル１２とスロットケース２１との結合度、ならびに、スロットケース２１とアンテナコイル３１との結合度が向上する。 The slot case 21 includes a top surface having a plurality of sides and two side surfaces respectively connected to at least two sides of the plurality of sides, and an opening 21A and a slit portion 21S of the slot case 21 are provided on the top surface. Of the side surfaces, the opening SS is preferably provided on a side surface different from the side surface on which the insertion slot CS of the card type device 10 is provided. In the example shown in FIG. 2, the slot case 21 has a rectangular top surface and four side surfaces connected to the top surface in a plan view, and the insertion slot CS is left on the side surface into which the card-type device 10 is inserted. Openings SS are respectively provided on the three side surfaces. When the side surface of the slot case 21 is thus opened, the magnetic flux passing through these openings is formed smoothly, the degree of coupling between the feeding coil 12 and the slot case 21, and the slot case 21 and the antenna coil 31. The degree of coupling increases.
　スロットケース２１がメモリーカード用スロットケースのように、筐体の側面から挿入される場合、スロットケース２１のスリット部２１Ｓの位置は、カード型デバイス１０の挿入口ＣＳ側に切れていてもよいし、筐体の内側に向かって切れていてもよい。但し、このスリット部２１Ｓが形成されている方向に相対的に大きな磁束が形成されるため、スリット部２１Ｓはアンテナコイル（またはアンテナコイルの結合コイル部）と主に結合する方向に向かって切れていることが好ましい。また、スリット部２１Ｓが形成されている部位の機械的強度が多少低下するため、図１、図２に示したように、スリット部２１Ｓはカード型デバイス１０の挿入口ＣＳとは反対側に形成されていることが好ましい。 When the slot case 21 is inserted from the side of the housing like a memory card slot case, the position of the slit portion 21S of the slot case 21 may be cut to the insertion slot CS side of the card type device 10. It may be cut toward the inside of the housing. However, since a relatively large magnetic flux is formed in the direction in which the slit portion 21S is formed, the slit portion 21S is cut in a direction mainly coupled to the antenna coil (or the coupling coil portion of the antenna coil). Preferably it is. Further, since the mechanical strength of the portion where the slit portion 21S is formed is somewhat lowered, the slit portion 21S is formed on the opposite side of the insertion slot CS of the card type device 10 as shown in FIGS. It is preferable that
　なお、この例では、平面視で、スロットケース２１の開口部２１Ａの全体が給電コイル１２のコイル開口に重なっているが、部分的に重なっていてもよい。すなわち少なくとも一部が重なっていればよい。但し、図２に示したように、スロットケース２１の開口部２１Ａの全体が給電コイル１２のコイル開口に重なっていると、給電コイル１２とスロットケース２１との結合度が高まる。 In this example, the entire opening 21A of the slot case 21 overlaps the coil opening of the power feeding coil 12 in plan view, but may partially overlap. That is, it is sufficient that at least a part of them overlap. However, as shown in FIG. 2, when the entire opening 21 </ b> A of the slot case 21 overlaps the coil opening of the power feeding coil 12, the degree of coupling between the power feeding coil 12 and the slot case 21 increases.
　図３（Ａ）は通信端末装置１０１の主要部の断面図、図３（Ｂ）はその部分拡大図である。また、図４（Ａ）はブースターアンテナ３０１が貼付された筐体４１の内面を示す図である。図４（Ｂ）および図４（Ｃ）はブースターアンテナ３０１に形成されたアンテナコイルと結合コイルのみの平面図である。 3A is a cross-sectional view of the main part of the communication terminal apparatus 101, and FIG. 3B is a partially enlarged view thereof. FIG. 4A is a diagram showing the inner surface of the housing 41 to which the booster antenna 301 is attached. 4B and 4C are plan views of only the antenna coil and the coupling coil formed in the booster antenna 301. FIG.
　図３（Ａ）に表れているように、筐体４１の裏面ＲＦ（図３は筐体の上下を逆に置いた状態である。）の内面に、ブースターアンテナ３０１が貼付されている。 As shown in FIG. 3A, a booster antenna 301 is attached to the inner surface of the rear surface RF of the housing 41 (FIG. 3 is a state in which the housing is placed upside down).
　ブースターアンテナ３０１は、基材シート３０、この基材シート３０の第１主面に形成された放射コイル部３１１Ｒ、結合コイル部３１１Ｃ、基材シート３０の第２主面に形成された放射コイル部３１２Ｒ、結合コイル部３１２Ｃ、およびフェライトシート３２で構成されている。 The booster antenna 301 includes a base material sheet 30, a radiation coil portion 311 </ b> R formed on the first main surface of the base material sheet 30, a coupling coil portion 311 </ b> C, and a radiation coil portion formed on the second main surface of the base material sheet 30. 312R, the coupling coil part 312C, and the ferrite sheet 32 are comprised.
　図４（Ｂ）は基材シート３０の第１主面に形成された放射コイル部３１１Ｒおよび結合コイル部３１１Ｃを基材シートの第１主面側から見た図であり、図４（Ｃ）は基材シート３０の第２主面に形成された放射コイル部３１２Ｒおよび結合コイル部３１２Ｃを基材シートの第１主面側から透視した図である。 FIG. 4B is a view of the radiation coil portion 311R and the coupling coil portion 311C formed on the first main surface of the base sheet 30 as viewed from the first main surface side of the base sheet, and FIG. These are the figures which looked through the radiation | emission coil part 312R and the coupling coil part 312C which were formed in the 2nd main surface of the base material sheet 30 from the 1st main surface side of the base material sheet.
　このように、アンテナコイルの放射コイル部３１１Ｒと放射コイル部３１２Ｒとの巻回方向は逆であり、両者は電磁界結合する。同様に、結合コイル部３１１Ｃと結合コイル部３１２Ｃとの巻回方向は逆である。そのため、各導体パターンに電流が流れたとき、平面視で同じ向きに電流が流れることになる。このような構成であれば、ブリッジパターンやビア導体を形成することなく、２層（またはそれ以上）の積層型アンテナコイルを形成することができるとともに、アンテナコイルだけでＬＣ共振回路を構成できる。 Thus, the winding directions of the radiation coil portion 311R and the radiation coil portion 312R of the antenna coil are opposite, and both are electromagnetically coupled. Similarly, the winding directions of the coupling coil portion 311C and the coupling coil portion 312C are opposite. Therefore, when a current flows through each conductor pattern, the current flows in the same direction in plan view. With such a configuration, a two-layer (or more) stacked antenna coil can be formed without forming a bridge pattern or a via conductor, and an LC resonance circuit can be configured with only the antenna coil.
　フェライトシート３２は放射コイル部３１１Ｒ，３１２Ｒを覆っている。フェライトシート３２の下方（放射コイル部３１１Ｒ，３１２Ｒとは反対面側）には、プリント配線板２２のグランド電極ＧＮＤ、プリント配線板２２に搭載された表面実装部品（不図示）、さらにはバッテリーパックの金属カバー等の金属物（不図示）等が設けられていることがあるが、フェライトシート３２は前記金属物に鎖交しようとする磁束を遮蔽するので、金属物に渦電流が発生することによる損失が殆ど生じることがなく、アンテナコイルの放射特性について金属物による影響を最小限に抑制することができる。 The ferrite sheet 32 covers the radiation coil portions 311R and 312R. Below the ferrite sheet 32 (on the side opposite to the radiation coil portions 311R and 312R), the ground electrode GND of the printed wiring board 22, a surface mount component (not shown) mounted on the printed wiring board 22, and a battery pack Metal objects (not shown) such as metal covers may be provided, but the ferrite sheet 32 shields the magnetic flux to be linked to the metal objects, so that eddy currents are generated in the metal objects. Therefore, the influence of metal objects on the radiation characteristics of the antenna coil can be minimized.
　図３（Ｂ）に表れているように、ブースターアンテナ３０１は接着剤による接着層３３を介して筐体４１の内面に貼付されている。カード型デバイス１０の内部にはプリント配線板１３が設けられていて、このプリント配線板１３に給電コイル１２が形成されている。また、このプリント配線板１３にＲＦＩＣ１１が実装されている。 As shown in FIG. 3B, the booster antenna 301 is attached to the inner surface of the housing 41 through an adhesive layer 33 made of an adhesive. A printed wiring board 13 is provided inside the card type device 10, and a feeding coil 12 is formed on the printed wiring board 13. Further, the RFIC 11 is mounted on the printed wiring board 13.
　図５（Ａ）はスロットケース２１と結合コイル部３１Ｃとの位置関係を示す斜視図である。図５（Ｂ）はその平面図である。図５（Ａ）に示すように、結合コイル部３１Ｃは２つ（２層）の結合コイル部３１１Ｃ，３１２Ｃで構成されている。これらの結合コイル部３１１Ｃ，３１２Ｃは、スロットケース２１の開口部２１Ａの近接位置で開口部２１Ａの周囲を周回するように配置されている。 FIG. 5A is a perspective view showing a positional relationship between the slot case 21 and the coupling coil portion 31C. FIG. 5B is a plan view thereof. As shown in FIG. 5A, the coupling coil portion 31C is composed of two (two layers) coupling coil portions 311C and 312C. The coupling coil portions 311C and 312C are arranged so as to circulate around the opening 21A at a position close to the opening 21A of the slot case 21.
　なお、この例では、平面視で、スロットケース２１の開口部２１Ａの全体が結合コイル部３１Ｃのコイル開口に重なっているが、部分的に重なっていてもよい。すなわち少なくとも一部が重なっていればよい。但し、図５（Ａ）、図５（Ｂ）に示したように、スロットケース２１の開口部２１Ａの全体が結合コイル部３１Ｃのコイル開口に重なっていると、結合コイル部３１Ｃとスロットケース２１との結合度が高まる。 In this example, the entire opening 21A of the slot case 21 overlaps with the coil opening of the coupling coil portion 31C in plan view, but may partially overlap. That is, it is sufficient that at least a part of them overlap. However, as shown in FIGS. 5A and 5B, when the entire opening 21A of the slot case 21 overlaps the coil opening of the coupling coil portion 31C, the coupling coil portion 31C and the slot case 21 are overlapped. The degree of binding with increases.
　図６（Ａ）は通信端末装置１０１と通信相手側アンテナとの結合の様子を示す図である。図６（Ｂ）はカード型デバイス１０の給電コイル、スロットケースおよび結合コイル部との結合の様子を示す図である。 FIG. 6A is a diagram showing a state of coupling between the communication terminal apparatus 101 and the communication partner antenna. FIG. 6B is a diagram illustrating a state of coupling of the power supply coil, the slot case, and the coupling coil unit of the card type device 10.
　図７は、図６（Ｂ）とは異なる、カード型デバイス１０の給電コイル、スロットケースおよび結合コイル部との結合の様子を示す図である。 FIG. 7 is a diagram showing a state of coupling with the feeding coil, slot case, and coupling coil portion of the card type device 10, which is different from FIG. 6 (B).
　図８は、カード型デバイス１０が装着された、第１の実施形態の通信端末装置１０１の等価回路図である。 FIG. 8 is an equivalent circuit diagram of the communication terminal apparatus 101 according to the first embodiment in which the card type device 10 is mounted.
　図６（Ａ）において、磁束ＭＦ３はブースターアンテナ３０１の放射コイル部３１Ｒおよび結合コイル部３１Ｃ（主に放射コイル部３１Ｒ）に鎖交する。このことによりブースターアンテナ３０１は通信相手側アンテナと電磁界結合（主に磁界結合）する。放射コイル部３１Ｒの背後にはフェライトシート３２があるので、磁束ＭＦ３は放射コイル部３１Ｒとフェライトシート３２との間を透過する。 6A, the magnetic flux MF3 is linked to the radiation coil portion 31R and the coupling coil portion 31C (mainly the radiation coil portion 31R) of the booster antenna 301. As a result, the booster antenna 301 is electromagnetically coupled (mainly magnetic field coupled) with the communication partner antenna. Since the ferrite sheet 32 is behind the radiation coil portion 31R, the magnetic flux MF3 is transmitted between the radiation coil portion 31R and the ferrite sheet 32.
　図６（Ｂ）において、結合領域ＣＦ１はカード型デバイス１０内の給電コイル１２とスロットケース２１との結合領域を示している。（ＣＦ１は磁束ループを表しているのではない。）給電コイル１２とスロットケース２１とは電磁界結合（主に磁界結合）する。また、結合領域ＣＦ２はブースターアンテナ３０１の結合コイル部３１Ｃとスロットケース２１との結合領域を示している。（ＣＦ２は磁束ループを表しているのではない。）結合コイル部３１Ｃとスロットケース２１とは電磁界結合（主にスロットケース２１の開口部２１Ａの周囲付近を流れる電流による磁界で結合）する。 6B, a coupling region CF1 indicates a coupling region between the feeding coil 12 and the slot case 21 in the card type device 10. (CF1 does not represent a magnetic flux loop.) The feeding coil 12 and the slot case 21 are electromagnetically coupled (mainly magnetic field coupling). A coupling region CF <b> 2 indicates a coupling region between the coupling coil portion 31 </ b> C of the booster antenna 301 and the slot case 21. (CF2 does not represent a magnetic flux loop.) The coupling coil portion 31C and the slot case 21 are electromagnetically coupled (mainly coupled by a magnetic field caused by a current flowing around the opening 21A of the slot case 21).
　結合コイル部３１Ｃがスロットケース２１の開口部２１Ａの近接位置で開口部２１Ａの周囲付近を周回するように配置されていると、スロットケース２１の開口部２１Ａの周囲と結合コイル部３１Ｃのコイル開口とが最短距離で近接するとともに、各開口を通る磁束がほぼ直線状になるため、磁束の形成が円滑になり、スロットケース２１と結合コイル部３１Ｃとの結合度を向上させることができる。 When the coupling coil portion 31C is arranged so as to go around the periphery of the opening 21A at a position close to the opening 21A of the slot case 21, the periphery of the opening 21A of the slot case 21 and the coil opening of the coupling coil portion 31C Are close to each other at the shortest distance, and the magnetic flux passing through each opening is substantially linear. Therefore, the magnetic flux can be formed smoothly, and the degree of coupling between the slot case 21 and the coupling coil portion 31C can be improved.
　さらに、筐体４１を裏面ＲＦ方向から平面視したとき、給電コイル１２のコイル開口、スロットケース２１の開口部２１Ａ、および、結合コイル部３１Ｃのコイル開口が少なくとも一部で重なっていることが好ましい。このように配置されている場合、結合コイル部３１Ｃのコイル開口、スロットケース２１の開口部２１Ａ、および結合コイル部３１Ｃのコイル開口が最短距離で結ばれ、各開口を通る磁束がほぼ直線状になるため、磁束の形成が円滑になり、給電コイル１２、スロットケース２１および結合コイル部３１Ｃの結合度をさらに向上させることができる。 Furthermore, when the housing 41 is viewed in plan from the back surface RF direction, it is preferable that the coil opening of the feeding coil 12, the opening 21A of the slot case 21, and the coil opening of the coupling coil part 31C overlap at least partially. . When arranged in this way, the coil opening of the coupling coil portion 31C, the opening portion 21A of the slot case 21, and the coil opening of the coupling coil portion 31C are connected with the shortest distance, and the magnetic flux passing through each opening is substantially linear. Therefore, the formation of the magnetic flux becomes smooth, and the coupling degree of the feeding coil 12, the slot case 21, and the coupling coil portion 31C can be further improved.
　図７は、図６（Ｂ）に示した例とは異なる、カード型デバイス１０の給電コイル、スロットケースおよび結合コイル部との結合の様子を示す図である。図６（Ｂ）に示した例では、結合コイル部３１Ｃがスロットケース２１の開口部２１Ａの近接位置で開口部２１Ａの周囲を周回するように配置されていたが、図７に示す例では、スロットケース２１の外周と結合コイル部３１Ｃの形成領域とが、平面視で少なくとも一部が重なるように配置されている。スロットケース２１の外周が平面視で結合コイル部３１Ｃのコイルの形成領域に重なっていると、スロットケース２１の外周を流れる電流による磁界によってスロットケース２１と結合コイル部３１Ｃとが電磁界結合（主に磁界結合）しやすくなる。これにより、スロットケース２１と結合コイル部３１Ｃとの結合度を向上させることができる。 FIG. 7 is a diagram showing a state of coupling with the feeding coil, the slot case, and the coupling coil portion of the card type device 10, which is different from the example shown in FIG. 6 (B). In the example shown in FIG. 6B, the coupling coil portion 31C is arranged so as to go around the opening 21A at a position close to the opening 21A of the slot case 21, but in the example shown in FIG. The outer periphery of the slot case 21 and the formation region of the coupling coil portion 31C are arranged so that at least a part thereof overlaps in plan view. If the outer periphery of the slot case 21 overlaps with the coil formation region of the coupling coil portion 31C in plan view, the slot case 21 and the coupling coil portion 31C are electromagnetically coupled (mainly by the magnetic field generated by the current flowing through the outer periphery of the slot case 21). Magnetic field coupling). Thereby, the coupling degree of the slot case 21 and the coupling coil part 31C can be improved.
　図８において、インダクタＬ１，Ｌ２は結合コイル部３１１Ｃ，３１２Ｃによるインダクタンスを記号で表したもの、インダクタＬ３，Ｌ４は放射コイル部３１１Ｒ，３１２Ｒによるインダクタンスを記号で表したものである。結合コイル部での結合を記号Ｍ１で表している。また、放射コイル部での結合を記号Ｍ２で表している。キャパシタＣ１，Ｃ２は第１アンテナコイル（結合コイル部３１１Ｃおよび放射コイル部３１１Ｒ）と第２アンテナコイル（結合コイル部３１２Ｃおよび放射コイル部３１２Ｒ）との間に生じる容量を集中定数の記号で表したものである。このようにアンテナコイル３１はＬＣ回路を構成している。 8, inductors L1 and L2 represent inductances by the coupling coil portions 311C and 312C by symbols, and inductors L3 and L4 represent inductances by the radiation coil portions 311R and 312R by symbols. The coupling at the coupling coil portion is represented by the symbol M1. In addition, the coupling at the radiation coil portion is represented by the symbol M2. Capacitors C1 and C2 represent the capacitance generated between the first antenna coil (coupling coil portion 311C and radiation coil portion 311R) and the second antenna coil (coupling coil portion 312C and radiation coil portion 312R) with a lumped constant symbol. Is. Thus, the antenna coil 31 forms an LC circuit.
　図８において、インダクタＬｂはスロットケース２１に流れる電流の経路で生じるインダクタンスを記号で表したもの、キャパシタＣｂはスロットケース２１のスリット部２１Ｓ部分に生じる容量である。このインダクタＬｂとキャパシタＣｂとでＬＣ共振回路を構成している。インダクタＬｂとインダクタＬ１との結合を記号Ｍｂ－１で表している。また、インダクタＬｂとインダクタＬ２との結合を記号Ｍｂ－２で表している。 8, the inductor Lb represents the inductance generated in the path of the current flowing in the slot case 21 by a symbol, and the capacitor Cb is a capacitance generated in the slit portion 21S portion of the slot case 21. The inductor Lb and the capacitor Cb constitute an LC resonance circuit. The coupling between the inductor Lb and the inductor L1 is represented by the symbol Mb-1. Further, the coupling between the inductor Lb and the inductor L2 is represented by the symbol Mb-2.
　図８において、インダクタＬａはカード型デバイス１０の給電コイル１２によるインダクタンスを記号で表したものである。キャパシタＣＩＣはＲＦＩＣ１１の寄生容量など、給電コイル１２に繋がるキャパシタンスを記号で表したものである。インダクタＬａとキャパシタＣＩＣはＬＣ共振する。このことでＲＦＩＣ１１はスロットケース２１による前記ＬＣ回路とインピーダンス整合状態で結合する。インダクタＬａとスロットケース２１のインダクタＬｂとの結合をＭａ－ｂで表している。 In FIG. 8, the inductor La represents the inductance by the power supply coil 12 of the card type device 10 as a symbol. The capacitor CIC represents a capacitance connected to the feeding coil 12 such as a parasitic capacitance of the RFIC 11 by a symbol. The inductor La and the capacitor CIC resonate with each other. Thus, the RFIC 11 is coupled with the LC circuit by the slot case 21 in an impedance matching state. The coupling between the inductor La and the inductor Lb of the slot case 21 is represented by Ma-b.
　以上に示した構成により、通信時には通信相手側アンテナ→放射コイル部３１Ｒ→結合コイル部３１Ｃ→スロットケース２１→カード型デバイス１０内の給電コイル１２→ＲＦＩＣ１１の順、または、この逆の順に結合して高周波電力および高周波信号が伝達される。 With the configuration described above, during communication, the communication partner side antenna → radiation coil portion 31R → coupling coil portion 31C → slot case 21 → feeding coil 12 in the card type device 10 → RFIC 11 or the reverse order is coupled. Thus, high frequency power and high frequency signals are transmitted.
　なお、アンテナコイル３１による共振回路とスロットケースによる共振回路とで複共振を生じさせてもよい。そして、この複共振を、カード型デバイス１０内の給電コイル１２とスロットケース２１との間のエネルギー伝達、およびアンテナコイル３１とスロットケース２１との間のエネルギー伝達の効率を高めるために利用してもよいし、広帯域化に利用してもよい。 It should be noted that double resonance may be generated between the resonance circuit using the antenna coil 31 and the resonance circuit using the slot case. The double resonance is used to increase the efficiency of energy transfer between the feeding coil 12 and the slot case 21 in the card type device 10 and energy transfer between the antenna coil 31 and the slot case 21. Alternatively, it may be used for broadening the bandwidth.
　このようにして、カード型デバイス１０が備えている入出力端子を利用することなく、カード型デバイス１０はＲＦＩＤ等の通信機能を持つ。特に、金属製のスロットケース２１を用いているにもかかわらず、カード型デバイス１０の給電コイル１２から通信端末装置本体のアンテナコイル３１に高周波電力を効率良く伝達させることができ、強度や耐久性に優れ、且つ通信特性にも優れた通信端末装置を得ることができる。 In this way, the card type device 10 has a communication function such as RFID without using the input / output terminals of the card type device 10. In particular, despite the use of the metal slot case 21, high-frequency power can be efficiently transmitted from the feeding coil 12 of the card type device 10 to the antenna coil 31 of the communication terminal device main body, and the strength and durability can be improved. It is possible to obtain a communication terminal apparatus that is excellent in communication characteristics.
《第２の実施形態》
　図９は第２の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。 << Second Embodiment >>
FIG. 9 is a perspective view showing a main configuration inside the housing of the communication terminal device of the second embodiment.
　図９に示すように、プリント配線板２２には金属製のスロットケース２１が取り付けられている。このスロットケース２１は、スロットケース２１とプリント配線板２２との間にカード型デバイス１０が着脱できる空間（スロット）を構成する。このスロットケース２１が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。カード型デバイス１０をスロットケース２１に装着することにより、カード型デバイス１０の電極がプリント配線板２２の端子に電気的に接続される。 As shown in FIG. 9, a metal slot case 21 is attached to the printed wiring board 22. The slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22. On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided. By attaching the card type device 10 to the slot case 21, the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
　アンテナコイル３１は放射コイル部３１Ｒおよび結合コイル部３１Ｃを備えていて、結合コイル部３１Ｃはスロットケース２１に近接している。アンテナコイル３１の構成は第１の実施形態で示したものと同じである。このアンテナコイル３１はブースターアンテナの一部であり、ブースターアンテナは例えば筐体の内面に貼付されている。 The antenna coil 31 includes a radiation coil portion 31R and a coupling coil portion 31C, and the coupling coil portion 31C is close to the slot case 21. The configuration of the antenna coil 31 is the same as that shown in the first embodiment. The antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing, for example.
　図１０は第２の実施形態の通信端末装置の筐体に設けられているスロットケース２１の構成を示す図である。スロットケース２１は図９に示したカード型デバイス１０内の給電コイル１２のコイル開口と対向する部分に設けられた開口部２１Ａ、および、開口部２１Ａとスロットケース２１の外縁とを結ぶスリット部２１Ｓを備えている。 FIG. 10 is a diagram illustrating a configuration of the slot case 21 provided in the housing of the communication terminal device according to the second embodiment. The slot case 21 has an opening 21A provided at a portion facing the coil opening of the power feeding coil 12 in the card type device 10 shown in FIG. 9, and a slit 21S that connects the opening 21A and the outer edge of the slot case 21. It has.
　このように、カード型デバイス１０内の給電コイル１２の位置に応じて、スロットケース２１の開口部２１Ａの位置を定めればよい。また、開口部２１Ａとスロットケース２１の外縁との距離が短い位置にスリット部２１Ｓを設ければよい。そのことにより、結合に直接寄与しないスリット部２１Ｓの割合を小さくでき、また機械的強度を確保できる。 As described above, the position of the opening 21A of the slot case 21 may be determined according to the position of the feeding coil 12 in the card type device 10. Further, the slit portion 21S may be provided at a position where the distance between the opening 21A and the outer edge of the slot case 21 is short. As a result, the ratio of the slit portions 21S that do not directly contribute to the coupling can be reduced, and the mechanical strength can be ensured.
《第３の実施形態》
　図１１は第３の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。図１２はその筐体内に設けられているアンテナコイルの構成を示す図である。図１３はそのアンテナコイルの等価回路図である。図１４はスロットケースとアンテナコイルとの位置関係を示す図である。 << Third Embodiment >>
FIG. 11 is a perspective view illustrating a main configuration inside the housing of the communication terminal device according to the third embodiment. FIG. 12 is a diagram showing a configuration of an antenna coil provided in the casing. FIG. 13 is an equivalent circuit diagram of the antenna coil. FIG. 14 is a diagram showing a positional relationship between the slot case and the antenna coil.
　図１１に示すように、プリント配線板２２には金属製のスロットケース２１が取り付けられている。このスロットケース２１は、スロットケース２１とプリント配線板２２との間にカード型デバイス１０が着脱できる空間（スロット）を構成する。このスロットケース２１が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。カード型デバイス１０をスロットケース２１に装着することにより、カード型デバイス１０の電極がプリント配線板２２の端子に電気的に接続される。 As shown in FIG. 11, a metal slot case 21 is attached to the printed wiring board 22. The slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22. On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided. By attaching the card type device 10 to the slot case 21, the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
　図１２に示すように、アンテナコイル３１は上層のアンテナコイル３１１と下層のアンテナコイル３１２とで構成されている。具体的には、基材シートの第１主面にアンテナコイル３１１が形成されていて、基材シートの第２主面にアンテナコイル３１２が形成されている。アンテナコイル３１１，３１２は矩形の渦巻き状に形成されていて、アンテナコイル３１１とアンテナコイル３１２の巻回方向は逆であり、両者は電磁界結合する。第１、第２の実施形態で示したアンテナコイルと異なり、放射コイル部と結合コイル部との区別はなく、アンテナコイル３１の全体が放射コイルとして作用し、且つ一部が結合コイルとして作用する。このアンテナコイル３１はブースターアンテナの一部であり、ブースターアンテナは筐体の内面に貼付されている。 As shown in FIG. 12, the antenna coil 31 includes an upper layer antenna coil 311 and a lower layer antenna coil 312. Specifically, the antenna coil 311 is formed on the first main surface of the base sheet, and the antenna coil 312 is formed on the second main surface of the base sheet. The antenna coils 311 and 312 are formed in a rectangular spiral shape, and the winding directions of the antenna coil 311 and the antenna coil 312 are opposite, and both are electromagnetically coupled. Unlike the antenna coils shown in the first and second embodiments, there is no distinction between a radiating coil portion and a coupling coil portion, the entire antenna coil 31 acts as a radiating coil, and a part acts as a coupling coil. . The antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the casing.
　図１３はアンテナコイル３１の等価回路図である。図１３において、インダクタＬ１，Ｌ２はアンテナコイル３１１，３１２によるインダクタンスを記号で表したものである。アンテナコイル３１１と３１２との結合を記号Ｍで表している。キャパシタＣ１，Ｃ２は第１アンテナコイル３１１と第２アンテナコイル３１２との間に生じる容量を集中定数の記号で表したものである。このようにアンテナコイル３１はＬＣ回路を構成している。 FIG. 13 is an equivalent circuit diagram of the antenna coil 31. In FIG. 13, inductors L1 and L2 represent the inductances of the antenna coils 311 and 312 by symbols. The coupling between the antenna coils 311 and 312 is represented by the symbol M. Capacitors C1 and C2 represent the capacitance generated between the first antenna coil 311 and the second antenna coil 312 with a lumped constant symbol. Thus, the antenna coil 31 forms an LC circuit.
　図１４に示すように、アンテナコイル３１はその矩形渦巻き状コイルの角部がスロットケース２１の外周の二辺に沿うように配置される。スロットケース２１は、その外周に沿って電流が流れるので、スロットケース２１とアンテナコイル３１とは電磁界結合（主に磁界結合）する。そして、アンテナコイル３１は放射コイルとしても作用し、通信相手側アンテナとも結合する。 As shown in FIG. 14, the antenna coil 31 is arranged so that the corners of the rectangular spiral coil are along two sides of the outer periphery of the slot case 21. Since current flows along the outer periphery of the slot case 21, the slot case 21 and the antenna coil 31 are electromagnetically coupled (mainly magnetic field coupling). The antenna coil 31 also functions as a radiating coil, and is also coupled to the communication partner antenna.
《第４の実施形態》
　図１５は第４の実施形態の通信端末装置の筐体内部の主要な構成を示す斜視図である。図１６はその筐体内に設けられているアンテナコイルの構成を示すである。図１７はスロットケースとアンテナコイルとの位置関係を示す図である。 << Fourth Embodiment >>
FIG. 15 is a perspective view showing the main configuration inside the housing of the communication terminal device of the fourth embodiment. FIG. 16 shows a configuration of an antenna coil provided in the casing. FIG. 17 is a diagram showing the positional relationship between the slot case and the antenna coil.
　図１５に示すように、プリント配線板２２には金属製のスロットケース２１が取り付けられている。このスロットケース２１は、スロットケース２１とプリント配線板２２との間にカード型デバイス１０が着脱できる空間（スロット）を構成する。このスロットケース２１が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。カード型デバイス１０をスロットケース２１に装着することにより、カード型デバイス１０の電極がプリント配線板２２の端子に電気的に接続される。 As shown in FIG. 15, a metal slot case 21 is attached to the printed wiring board 22. The slot case 21 constitutes a space (slot) between which the card type device 10 can be attached and detached between the slot case 21 and the printed wiring board 22. On the surface of the printed wiring board 22 that the slot case 21 faces, a terminal that is brought into electrical contact with the electrode of the card type device 10 is provided. By attaching the card type device 10 to the slot case 21, the electrodes of the card type device 10 are electrically connected to the terminals of the printed wiring board 22.
　図１６に示すように、アンテナコイル３１は上層のアンテナコイル３１１と下層のアンテナコイル３１２とで構成されている。上層のアンテナコイル３１１は結合コイル部３１１Ｃおよび放射コイル部３１１Ｒを備えている。同様に、下層のアンテナコイル３１２は結合コイル部３１２Ｃおよび放射コイル部３１２Ｒを備えている。この例では、結合コイル部３１１Ｃ，３１２Ｃは放射コイル部３１１Ｒ，３１２Ｒの巻回領域の内部に形成されている。具体的には、基材シートの第１主面にアンテナコイル３１１が形成されていて、基材シートの第２主面にアンテナコイル３１２が形成されている。アンテナコイル３１１，３１２は矩形の渦巻き状に形成されていて、アンテナコイルの放射コイル部３１１Ｒと放射コイル部３１２Ｒの巻回方向は逆であり、両者は電磁界結合する。同様に、結合コイル部３１１Ｃと結合コイル部３１２Ｃとの巻回方向は逆であり、両者は電磁界結合する。このアンテナコイル３１はブースターアンテナの一部であり、ブースターアンテナは例えば筐体の内面に貼付されている。 As shown in FIG. 16, the antenna coil 31 includes an upper layer antenna coil 311 and a lower layer antenna coil 312. The upper antenna coil 311 includes a coupling coil portion 311C and a radiation coil portion 311R. Similarly, the lower antenna coil 312 includes a coupling coil portion 312C and a radiation coil portion 312R. In this example, the coupling coil portions 311C and 312C are formed inside the winding region of the radiation coil portions 311R and 312R. Specifically, the antenna coil 311 is formed on the first main surface of the base sheet, and the antenna coil 312 is formed on the second main surface of the base sheet. The antenna coils 311 and 312 are formed in a rectangular spiral shape, and the winding directions of the radiation coil portion 311R and the radiation coil portion 312R of the antenna coil are opposite, and both are electromagnetically coupled. Similarly, the winding directions of the coupling coil portion 311C and the coupling coil portion 312C are opposite, and both are electromagnetically coupled. The antenna coil 31 is a part of a booster antenna, and the booster antenna is attached to the inner surface of the housing, for example.
　図１７に示すように、アンテナコイルの結合コイル部３１１Ｃ，３１２Ｃはスロットケース２１の開口部２１Ａの近接位置で開口部２１Ａを周回するように配置されている。図１７では、アンテナコイルのうち上層の放射コイル部３１１Ｒおよび結合コイル部３１１Ｃのパターンのみを表している。スロットケース２１と結合コイル部３１１Ｃ，３１２Ｃの結合の仕方は第１の実施形態で示したとおりである。 As shown in FIG. 17, the coupling coil portions 311C and 312C of the antenna coil are arranged so as to circulate around the opening 21A at a position close to the opening 21A of the slot case 21. In FIG. 17, only the pattern of the upper radiation coil part 311R and the coupling coil part 311C of the antenna coil is shown. The way of coupling the slot case 21 and the coupling coil portions 311C and 312C is as described in the first embodiment.
　このように、結合コイル部３１１Ｃ，３１２Ｃは放射コイル部３１１Ｒ，３１２Ｒの周回範囲の内側に配置されていてもよい。そのことにより、結合コイル部３１１Ｃ，３１２Ｃは放射（すなわち通信相手側アンテナとの結合）にも効果的に寄与する。 Thus, the coupling coil portions 311C and 312C may be disposed inside the circulation range of the radiation coil portions 311R and 312R. As a result, the coupling coil portions 311C and 312C effectively contribute to radiation (that is, coupling with the communication partner antenna).
《第５の実施形態》
　図１８は第５の実施形態の通信端末装置１０５の主要部の断面図である。この図に表れているように、筐体４１の裏面ＲＦの内面に、ブースターアンテナ３０１が貼付されている。ブースターアンテナ３０１の構成は第１の実施形態で示したものと同じである。第１の実施形態で図３に示した通信端末装置と異なるのはスロットケース２１およびカード型デバイス１０の位置である。スロットケース２１は、プリント配線板２２を挟んでブースターアンテナ３０１とは反対側に設けられている。このスロットケース２１およびカード型デバイス１０の構成は第１の実施形態で示したものと同じである。また、このスロットケース２１およびカード型デバイス１０とブースターアンテナ３０１の結合コイル部３１１Ｃ，３１２Ｃとの間に導体パターンが存在しないように、グランド電極ＧＮＤに「抜きエリア」ＶＯＧが形成されている。 << Fifth Embodiment >>
FIG. 18 is a cross-sectional view of a main part of the communication terminal device 105 according to the fifth embodiment. As shown in this figure, a booster antenna 301 is attached to the inner surface of the back surface RF of the housing 41. The configuration of the booster antenna 301 is the same as that shown in the first embodiment. The position of the slot case 21 and the card type device 10 is different from the communication terminal apparatus shown in FIG. 3 in the first embodiment. The slot case 21 is provided on the opposite side of the booster antenna 301 with the printed wiring board 22 interposed therebetween. The configurations of the slot case 21 and the card type device 10 are the same as those shown in the first embodiment. Further, the “extraction area” VOG is formed in the ground electrode GND so that no conductor pattern exists between the slot case 21 and the card type device 10 and the coupling coil portions 311C and 312C of the booster antenna 301.
　このような構成であっても、スロットケース２１はカード型デバイス１０の給電コイルと電磁界結合し、且つスロットケース２１はアンテナコイルの結合コイル部３１１Ｃ，３１２Ｃと電磁界結合する。 Even in such a configuration, the slot case 21 is electromagnetically coupled to the feeding coil of the card-type device 10, and the slot case 21 is electromagnetically coupled to the coupling coil portions 311C and 312C of the antenna coil.
《第６の実施形態》
　第６の実施形態は、カード型デバイスの給電コイルのコイル軸の向きが第１～第５の実施形態とは異なる。以下、第１～第５の実施形態で示した構成と異なる点について示す。 << Sixth Embodiment >>
The sixth embodiment is different from the first to fifth embodiments in the direction of the coil axis of the feeding coil of the card type device. Hereinafter, differences from the configurations shown in the first to fifth embodiments will be described.
　図１９は第６の実施形態の通信端末装置１０６の構成を示す図である。図１９（Ａ）は通信端末装置１０６の外観斜視図、図１９（Ｂ）は通信端末装置１０６の筐体内部の主要な構成を示す斜視図である。 FIG. 19 is a diagram illustrating a configuration of the communication terminal apparatus 106 according to the sixth embodiment. 19A is an external perspective view of the communication terminal device 106, and FIG. 19B is a perspective view showing a main configuration inside the housing of the communication terminal device 106. FIG.
　通信端末装置１０６の筐体４１には、カード型デバイス１０を挿抜するカードスロット４２を備えている。筐体４１の内部にはアンテナコイル３１が設けられている。カード型デバイス１０の内部には後に示すＲＦＩＣおよび給電コイル１２が設けられている。また、このカード型デバイス１０の図１９における下面には複数の電極が露出している。 The housing 41 of the communication terminal device 106 includes a card slot 42 into which the card type device 10 is inserted and removed. An antenna coil 31 is provided inside the housing 41. An RFIC and a feeding coil 12 described later are provided inside the card type device 10. Further, a plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
　プリント配線板２２にはカード装着部２０が設けられている。このカード装着部２０は金属部材２３を備えている。この金属部材２３はプリント配線板２２上の実装用ランドにはんだ付け等により実装されている。金属部材２３は、金属部材２３とプリント配線板２２との間にカード型デバイス１０が着脱できる空間を構成する。この金属部材２３が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。 The printed wiring board 22 is provided with a card mounting portion 20. The card mounting unit 20 includes a metal member 23. The metal member 23 is mounted on a mounting land on the printed wiring board 22 by soldering or the like. The metal member 23 constitutes a space in which the card type device 10 can be attached and detached between the metal member 23 and the printed wiring board 22. On the surface of the printed wiring board 22 to which the metal member 23 is opposed, a terminal is provided in which the electrode of the card type device 10 comes into contact and is electrically connected.
　図２０はカード装着部２０付近の構成を示す図である。図２０（Ａ）はプリント配線板２２に対するカード装着部２０付近の斜視図、図２０（Ｂ）はカード装着部２０付近の平面図である。図２０（Ｃ）はカード装着部の金属部材とカード型デバイス１０の給電コイル１２との結合の様子、およびカード装着部の金属部材とアンテナコイルの結合コイル部３１Ｃとの結合の様子を示す図である。 FIG. 20 is a diagram showing a configuration in the vicinity of the card mounting unit 20. FIG. 20A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and FIG. 20B is a plan view of the vicinity of the card mounting portion 20. FIG. 20C is a diagram showing a state of coupling between the metal member of the card mounting portion and the feeding coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. It is.
　カード型デバイス１０には、挿入方向にコイル軸を有する給電コイル１２が形成されている。この給電コイル１２の両端にはＲＦＩＣ１１が接続されている。 The card type device 10 has a feeding coil 12 having a coil axis in the insertion direction. The RFIC 11 is connected to both ends of the feeding coil 12.
　カード装着部２０は、例えばステンレス製の金属部材２３とプリント配線板２２に形成されている導体パターン２４とで構成されている。導体パターン２４はプリント配線板２２の上面、下面または内層に形成されている。金属部材２３と導体パターン２４とでコイル状の結合導体が構成されている。このコイル状の結合導体にはキャパシタＣｏが接続されている。すなわち、コイル状の結合導体とキャパシタＣｏとでＬＣ共振回路が構成されている。 The card mounting portion 20 is composed of, for example, a metal member 23 made of stainless steel and a conductor pattern 24 formed on the printed wiring board 22. The conductor pattern 24 is formed on the upper surface, lower surface or inner layer of the printed wiring board 22. The metal member 23 and the conductor pattern 24 constitute a coiled coupling conductor. A capacitor Co is connected to the coiled coupling conductor. That is, an LC resonance circuit is configured by the coil-shaped coupling conductor and the capacitor Co.
　金属部材２３とプリント配線板２２との間にはカード型デバイス１０を挿入装着する空間が構成されている。カード型デバイス１０が装着された状態で、カード型デバイス１０の給電コイル１２のコイル軸はカード装着部２０のコイル状結合導体によるコイルのコイル軸と実質的に同軸となる。そのため、カード型デバイス１０の給電コイル１２はカード装着部２０のコイル状結合導体と電磁界結合する。図２０（Ｃ）において、磁束φ１はカード型デバイス１０の給電コイル１２とカード装着部２０のコイル状結合導体との両方を鎖交する磁束を表している。 A space for inserting and mounting the card type device 10 is formed between the metal member 23 and the printed wiring board 22. In a state where the card type device 10 is mounted, the coil axis of the feeding coil 12 of the card type device 10 is substantially coaxial with the coil axis of the coil formed by the coiled coupling conductor of the card mounting unit 20. Therefore, the feeding coil 12 of the card type device 10 is electromagnetically coupled to the coiled coupling conductor of the card mounting unit 20. In FIG. 20C, the magnetic flux φ1 represents a magnetic flux that links both the power supply coil 12 of the card-type device 10 and the coiled coupling conductor of the card mounting portion 20.
　前記カード装着部２０のコイル状結合導体の近傍にはアンテナコイルの結合コイル部３１Ｃが配置されている。図２０（Ｂ）に表れているように、アンテナコイルの結合コイル部３１Ｃは、平面視で、カード装着部２０の金属部材２３とは完全には重ならない位置に近接している。そのため、アンテナコイルの結合コイル部３１Ｃはカード装着部２０のコイル状結合導体と電磁界結合する。図２０（Ｃ）において、磁束φ２はアンテナコイルの結合コイル部３１Ｃとカード装着部２０のコイル状結合導体との両方を鎖交する磁束を表している。 In the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed. As shown in FIG. 20B, the coupling coil portion 31C of the antenna coil is close to a position that does not completely overlap with the metal member 23 of the card mounting portion 20 in plan view. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20. In FIG. 20C, the magnetic flux φ2 represents the magnetic flux that links both the coupling coil portion 31C of the antenna coil and the coiled coupling conductor of the card mounting portion 20.
《第７の実施形態》
　第７の実施形態は、カード装着部の構造が第１～第６の実施形態とは異なる。以下、第１～第６の実施形態で示した構成と異なる点について示す。 << Seventh Embodiment >>
The seventh embodiment is different from the first to sixth embodiments in the structure of the card mounting portion. Hereinafter, differences from the configurations shown in the first to sixth embodiments will be described.
　図２１は第７の実施形態の通信端末装置１０７の構成を示す図である。図２１（Ａ）は通信端末装置１０７の外観斜視図、図２１（Ｂ）は通信端末装置１０７の筐体内部の主要な構成を示す斜視図である。 FIG. 21 is a diagram illustrating a configuration of the communication terminal device 107 according to the seventh embodiment. FIG. 21A is an external perspective view of the communication terminal device 107, and FIG. 21B is a perspective view showing a main configuration inside the housing of the communication terminal device 107.
　通信端末装置１０７の筐体４１には、カード型デバイス１０を挿抜するカードスロット４２を備えている。筐体４１の内部にはアンテナコイル３１が設けられている。カード型デバイス１０の内部には後に示すＲＦＩＣおよび給電コイル１２が設けられている。また、このカード型デバイス１０の図２１における下面には複数の電極が露出している。 The housing 41 of the communication terminal device 107 is provided with a card slot 42 into which the card type device 10 is inserted and removed. An antenna coil 31 is provided inside the housing 41. An RFIC and a feeding coil 12 described later are provided inside the card-type device 10. Further, a plurality of electrodes are exposed on the lower surface of the card type device 10 in FIG.
　プリント配線板２２にはカード装着部２０が設けられている。このカード装着部２０は金属部材２３を備えている。この金属部材２３は、金属部材２３とプリント配線板２２との間にカード型デバイス１０が着脱できる空間を構成する。この金属部材２３が対向するプリント配線板２２の面にはカード型デバイス１０の電極が当接して電気的に導通する端子が設けられている。 The printed wiring board 22 is provided with a card mounting portion 20. The card mounting unit 20 includes a metal member 23. The metal member 23 forms a space in which the card type device 10 can be attached and detached between the metal member 23 and the printed wiring board 22. On the surface of the printed wiring board 22 to which the metal member 23 is opposed, a terminal is provided in which the electrode of the card type device 10 comes into contact and is electrically connected.
　図２２はカード装着部２０付近の構成を示す図である。図２２（Ａ）はプリント配線板２２に対するカード装着部２０付近の斜視図、図２２（Ｂ）はカード装着部２０付近の平面図である。図２２（Ｃ）はカード装着部の金属部材２３とカード型デバイス１０の給電コイル１２との結合の様子、およびカード装着部の金属部材とアンテナコイルの結合コイル部３１Ｃとの結合の様子を示す図である。 FIG. 22 is a diagram showing a configuration in the vicinity of the card mounting unit 20. 22A is a perspective view of the vicinity of the card mounting portion 20 with respect to the printed wiring board 22, and FIG. 22B is a plan view of the vicinity of the card mounting portion 20. FIG. 22C shows a state of coupling between the metal member 23 of the card mounting portion and the power supply coil 12 of the card type device 10 and a state of coupling between the metal member of the card mounting portion and the coupling coil portion 31C of the antenna coil. FIG.
　カード型デバイス１０には、その平面に平行な面がコイル開口面となる給電コイル１２が形成されている。この給電コイル１２の両端にはＲＦＩＣ１１が接続されている。 The card type device 10 is formed with a feeding coil 12 having a plane parallel to the plane as a coil opening surface. The RFIC 11 is connected to both ends of the feeding coil 12.
　カード装着部２０は、例えばステンレス製の金属部材２３とプリント配線板２２に形成されている導体パターン２４とで構成されている。この金属部材２３と導体パターン２４とでコイル状の結合導体が構成されている。このコイル状の結合導体にはキャパシタＣｏが接続されている。すなわち、コイル状の結合導体とキャパシタＣｏとでＬＣ共振回路が構成されている。 The card mounting portion 20 is composed of, for example, a metal member 23 made of stainless steel and a conductor pattern 24 formed on the printed wiring board 22. The metal member 23 and the conductor pattern 24 constitute a coiled coupling conductor. A capacitor Co is connected to the coiled coupling conductor. That is, an LC resonance circuit is configured by the coil-shaped coupling conductor and the capacitor Co.
　金属部材２３とプリント配線板２２との間にはカード型デバイス１０を挿入装着する空間が構成されている。カード型デバイス１０が装着された状態で、カード型デバイス１０の給電コイル１２はカード装着部２０のコイル状結合導体と電磁界結合する（図２２（Ｃ）参照）。 A space for inserting and mounting the card type device 10 is formed between the metal member 23 and the printed wiring board 22. In a state where the card type device 10 is mounted, the feeding coil 12 of the card type device 10 is electromagnetically coupled to the coiled coupling conductor of the card mounting unit 20 (see FIG. 22C).
　前記カード装着部２０のコイル状結合導体の近傍にはアンテナコイルの結合コイル部３１Ｃが配置されている。カード型デバイス１０が装着された状態で、カード型デバイス１０の給電コイル１２のコイル開口が、カード装着部２０のコイル状結合導体のコイル開口と重なるように配置される。そのため、アンテナコイルの結合コイル部３１Ｃはカード装着部２０のコイル状結合導体と電磁界結合する。図２２（Ｃ）において、磁束φ１はカード型デバイス１０の給電コイル１２とカード装着部２０のコイル状結合導体との両方を鎖交する磁束を表している。 In the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed. In a state where the card type device 10 is mounted, the coil opening of the feeding coil 12 of the card type device 10 is arranged so as to overlap the coil opening of the coiled coupling conductor of the card mounting unit 20. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20. In FIG. 22C, the magnetic flux φ1 represents a magnetic flux that links both the feeding coil 12 of the card type device 10 and the coiled coupling conductor of the card mounting portion 20.
　前記カード装着部２０のコイル状結合導体の近傍にはアンテナコイルの結合コイル部３１Ｃが配置されている。図２２（Ｂ）に表れているように、アンテナコイルの結合コイル部３１Ｃのコイル開口が、平面視で、カード装着部２０のコイル状結合導体によるコイルのコイル開口と重なっている。そのため、アンテナコイルの結合コイル部３１Ｃはカード装着部２０のコイル状結合導体と電磁界結合する。図２２（Ｃ）において、磁束φ２はアンテナコイルの結合コイル部３１Ｃとカード装着部２０のコイル状結合導体との両方を鎖交する磁束を表している。 In the vicinity of the coiled coupling conductor of the card mounting portion 20, a coupling coil portion 31C of the antenna coil is disposed. As shown in FIG. 22B, the coil opening of the coupling coil portion 31C of the antenna coil overlaps the coil opening of the coil by the coiled coupling conductor of the card mounting portion 20 in plan view. Therefore, the coupling coil portion 31C of the antenna coil is electromagnetically coupled to the coiled coupling conductor of the card mounting portion 20. In FIG. 22C, the magnetic flux φ2 represents a magnetic flux that links both the coupling coil portion 31C of the antenna coil and the coiled coupling conductor of the card mounting portion 20.
《他の実施形態》
　以上に示した各実施形態では、筐体４１内部のプリント配線板２２にスロットケース２１を設け、カード型デバイス１０をこのスロットケース２１に着脱自在に設けたが、スロットケースを筐体の外面に設けて、カード型デバイス１０を通信端末装置の筐体の外部に装着できるように構成してもよい。 << Other embodiments >>
In each of the embodiments described above, the slot case 21 is provided on the printed wiring board 22 inside the housing 41, and the card type device 10 is detachably provided on the slot case 21, but the slot case is provided on the outer surface of the housing. The card type device 10 may be provided so as to be mounted outside the casing of the communication terminal device.
　また、以上に示した各実施形態では、アンテナコイルが２層のアンテナコイルによる積層型アンテナコイルとして構成された例を示したが、単体の結合コイル部および放射コイル部でアンテナコイルを構成してもよい。また、結合コイルを独立して設けずに、単体の放射コイル部のみでアンテナコイルを構成してもよい。単体の放射コイル部でアンテナコイルを構成する場合にはアンテナコイルにキャパシタを接続してもよい。すなわち、アンテナコイルのインダクタンスとキャパシタのキャパシタンスとで共振周波数を定めてもよい。 Further, in each of the embodiments described above, an example in which the antenna coil is configured as a laminated antenna coil including two layers of antenna coils has been described. However, the antenna coil is configured by a single coupling coil unit and a radiation coil unit. Also good. Further, the antenna coil may be configured with only a single radiation coil portion without providing the coupling coil independently. When the antenna coil is configured by a single radiation coil portion, a capacitor may be connected to the antenna coil. That is, the resonance frequency may be determined by the inductance of the antenna coil and the capacitance of the capacitor.
　また、アンテナコイルは３層以上の導体パターンによる積層型アンテナコイルであってもよい。 Further, the antenna coil may be a laminated antenna coil having a conductor pattern of three or more layers.
　また、アンテナコイルは、樹脂製の筐体に導体パターンを形成することで、筐体に一体的に設けてもよい。 Further, the antenna coil may be provided integrally with the casing by forming a conductor pattern on the resin casing.
　なお、アンテナコイルは、大径コイル部（放射コイル部）と小径コイル部（結合コイル部）とを有するものに限定されるものではなく、ループ状導体を１ターン以上巻回してなる１つの大面積アンテナコイル（平面コイル）であってもよい。スロットケースは、このアンテナコイルの一部に近接していればよい。また、スロットケースは、端末筺体の側面に挿入口を有したタイプに限定されるものではなく、たとえば端末筺体の内部に配置されたスロットケース（ＳＩＭカード用のスロットに多用されているタイプ）にも同様に適用できる。 The antenna coil is not limited to one having a large-diameter coil portion (radiating coil portion) and a small-diameter coil portion (coupled coil portion), and one large coil formed by winding a loop-shaped conductor for one turn or more. An area antenna coil (planar coil) may be used. The slot case only needs to be close to a part of the antenna coil. Further, the slot case is not limited to the type having the insertion opening on the side surface of the terminal housing. For example, the slot case is a slot case (a type often used for a slot for a SIM card) arranged inside the terminal housing. Can be applied similarly.
ＣＳ…挿入口
ＦＦ…表面
ＧＮＤ…グランド電極
ＭＦ…磁束
ＲＦ…裏面
ＳＳ…開口部
１０…カード型デバイス
１１…ＲＦＩＣ
１２…給電コイル
１２Ａ…開口部
１３…プリント配線板
２０…カード装着部
２１…スロットケース
２１Ａ…開口部
２１Ｓ…スリット部
２２…プリント配線板
２３…カード装着部の金属部材
２４…導体パターン
３０…基材シート
３１…アンテナコイル
３１Ｃ…結合コイル部
３１Ｒ…放射コイル部
３２…フェライトシート
３３…接着層
４１…筐体
４２…カードスロット
１０１，１０５～１０７…通信端末装置
３０１…ブースターアンテナ
３１１…第１アンテナコイル
３１１Ｃ…結合コイル部
３１１Ｒ…放射コイル部
３１２…第２アンテナコイル
３１２Ｃ…結合コイル部
３１２Ｒ…放射コイル部 CS ... insertion slot FF ... front surface GND ... ground electrode MF ... magnetic flux RF ... back surface SS ... opening 10 ... card type device 11 ... RFIC
DESCRIPTION OF SYMBOLS 12 ... Feed coil 12A ... Opening part 13 ... Printed wiring board 20 ... Card mounting part 21 ... Slot case 21A ... Opening part 21S ... Slit part 22 ... Printed wiring board 23 ... Metal member 24 of a card mounting part ... Conductor pattern 30 ... Base Material sheet 31 ... Antenna coil 31C ... Coupling coil part 31R ... Radiation coil part 32 ... Ferrite sheet 33 ... Adhesive layer 41 ... Case 42 ... Card slot 101, 105-107 ... Communication terminal device 301 ... Booster antenna 311 ... First antenna Coil 311C ... Coupling coil 311R ... Radiation coil 312 ... Second antenna coil 312C ... Coupling coil 312R ... Radiation coil

Claims (10)

  1. 　給電コイルを有するカード型デバイスが着脱可能に構成されたカード装着部と、アンテナコイルと、を備え、
    　前記カード装着部は、前記カード型デバイスの給電コイルおよび前記アンテナコイルと電磁界結合する結合導体を備えたことを特徴とする電子機器。     A card mounting unit configured to be detachable from a card-type device having a feeding coil, and an antenna coil,
    The electronic device according to claim 1, wherein the card mounting portion includes a coupling conductor that electromagnetically couples to a feeding coil and the antenna coil of the card type device.
  2. 　前記カード型デバイスの給電コイルは、カード型デバイスの平面に平行な面がコイル開口面であり、
    　前記カード装着部の結合導体は、前記給電コイルのコイル開口と対向する部分に設けられた開口部、および、前記開口部と前記カード装着部の外縁とを結ぶスリット部を有する、請求項１に記載の電子機器。     The feeding coil of the card type device has a coil opening surface parallel to the plane of the card type device,
    The coupling conductor of the card mounting portion includes an opening provided in a portion facing the coil opening of the power supply coil, and a slit portion that connects the opening and an outer edge of the card mounting portion. The electronic device described.
  3. 　前記カード装着部は複数の辺を有する天面と、前記複数の辺のうち少なくとも２辺にそれぞれ連接した２つの側面とを備え、前記天面に前記カード装着部の開口部および前記スリット部が設けられていて、前記側面のうち、前記カード型デバイスの挿入口が設けられている側面とは異なる側面に開口部が設けられている、請求項２に記載の電子機器。 The card mounting portion includes a top surface having a plurality of sides and two side surfaces respectively connected to at least two sides of the plurality of sides, and the opening portion of the card mounting portion and the slit portion are provided on the top surface. The electronic device according to claim 2, wherein an opening is provided on a side surface different from a side surface provided with an insertion port of the card type device.
  4. 　前記カード型デバイスの給電コイルは、カード型デバイスの平面に平行な面がコイル開口面であり、
    　前記カード装着部の結合導体は、回路基板に形成された導体パターンおよび前記回路基板に取り付けられた金属部材を備え、前記導体パターンおよび前記金属部材で、前記カード型デバイスの平面に平行な面をコイル開口面とするコイルを構成している、請求項１に記載の電子機器。     The feeding coil of the card type device has a coil opening surface parallel to the plane of the card type device,
    The coupling conductor of the card mounting portion includes a conductor pattern formed on a circuit board and a metal member attached to the circuit board, and the conductor pattern and the metal member have a plane parallel to the plane of the card type device. The electronic device of Claim 1 which comprises the coil used as a coil opening surface.
  5. 　平面視で、前記給電コイルのコイル開口は前記カード装着部の結合導体の開口部に対して少なくとも一部が重なっている、請求項２～４のいずれかに記載の電子機器。 5. The electronic device according to claim 2, wherein the coil opening of the feeding coil overlaps at least partly with the opening of the coupling conductor of the card mounting part in a plan view.
  6. 　前記カード型デバイスの給電コイルは、カード型デバイスの挿入方向にコイル軸を有し、
    　前記カード装着部の結合導体は、回路基板に形成された導体パターンおよび前記回路基板に取り付けられた金属部材を備え、前記導体パターンおよび前記金属部材で、前記カード型デバイスの挿入方向をコイル軸とするコイルを構成している、請求項１に記載の電子機器。     The power supply coil of the card type device has a coil axis in the insertion direction of the card type device,
    The coupling conductor of the card mounting portion includes a conductor pattern formed on a circuit board and a metal member attached to the circuit board, and the insertion direction of the card type device is a coil axis in the conductor pattern and the metal member. The electronic device of Claim 1 which comprises the coil which carries out.
  7. 　平面視で、前記アンテナコイルは前記カード装着部の結合導体の外周に対して少なくとも一部が重なっている、請求項１～６のいずれかに記載の電子機器。 The electronic device according to any one of claims 1 to 6, wherein at least a part of the antenna coil overlaps with an outer periphery of a coupling conductor of the card mounting portion in a plan view.
  8. 　前記アンテナコイルは、前記カード装着部の結合導体と結合する結合コイル部とこの結合コイル部よりコイル径が大きな放射コイル部とを含む、請求項１～７のいずれかに記載の電子機器。 The electronic device according to any one of claims 1 to 7, wherein the antenna coil includes a coupling coil unit coupled to a coupling conductor of the card mounting unit and a radiation coil unit having a coil diameter larger than that of the coupling coil unit.
  9. 　平面視で、前記アンテナコイルの結合コイル部は前記カード装着部の結合導体の開口部の周囲を周回するように配置されている、請求項８に記載の電子機器。 The electronic device according to claim 8, wherein the coupling coil portion of the antenna coil is arranged so as to circulate around the opening of the coupling conductor of the card mounting portion in plan view.
  10. 　前記アンテナコイルは、異なる層に形成された、互いに対向する第１アンテナコイルおよび第２アンテナコイルを含み、前記第１アンテナコイルと前記第２アンテナコイルとは容量を介して互いに結合されていて、前記カード装着部の結合導体との結合により流れる電流が同じ向きである、請求項１～９のいずれかに記載の電子機器。 The antenna coil includes a first antenna coil and a second antenna coil that are formed on different layers and face each other, and the first antenna coil and the second antenna coil are coupled to each other via a capacitor, The electronic device according to any one of claims 1 to 9, wherein currents flowing due to coupling with the coupling conductor of the card mounting portion are in the same direction.
PCT/JP2012/073435 2011-09-20 2012-09-13 Electronic equipment WO2013042604A1 (en)

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JP2013534681A JP5737413B2 (en) 2011-09-20 2012-09-13 Communication terminal device
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JPWO2013042604A1 (en) 2015-03-26

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