WO2016186091A1 - Dispositif d'antenne, et appareil électronique - Google Patents

Dispositif d'antenne, et appareil électronique Download PDF

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Publication number
WO2016186091A1
WO2016186091A1 PCT/JP2016/064544 JP2016064544W WO2016186091A1 WO 2016186091 A1 WO2016186091 A1 WO 2016186091A1 JP 2016064544 W JP2016064544 W JP 2016064544W WO 2016186091 A1 WO2016186091 A1 WO 2016186091A1
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WIPO (PCT)
Prior art keywords
frequency band
conductor
antenna
circuit
radiating element
Prior art date
Application number
PCT/JP2016/064544
Other languages
English (en)
Japanese (ja)
Inventor
伊藤宏充
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 CN201690000723.4U priority Critical patent/CN207910065U/zh
Publication of WO2016186091A1 publication Critical patent/WO2016186091A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • the present invention relates to an antenna device, and more particularly to an antenna device that is also used in a communication system using communication signals having different frequency bands.
  • the present invention also relates to an electronic apparatus including the antenna device.
  • Patent Document 1 discloses a small antenna device that can be used in a plurality of systems having different frequency bands.
  • This antenna device connects a radiation element of an electric field antenna, a first frequency band power supply circuit connected to the radiation element, a ground conductor disposed opposite to the radiation element, and the radiation element and the ground conductor.
  • An inductor, a power feeding coil, and a power feeding circuit of a second frequency band connected to the power feeding coil are provided.
  • the radiating elements, inductor and ground conductor are connected in series to form a loop, and this loop is coupled to the feeding coil.
  • the inductor is an element whose impedance approaches an open state in the first frequency band and approaches a short state in the second frequency band. Therefore, the radiating element acts as an electric field antenna element for the first frequency band, and the loop acts as an antenna element for the second frequency band.
  • the radiation element of the electric field type antenna for the first frequency band (UHF band) is composed of a ground conductor pattern and a reactance element, and is used for the second frequency band (HF band). Since it is also used as a part of the loop of the magnetic field antenna, antennas of different frequency bands can be configured in a limited space.
  • the radiating element of the antenna for the first frequency band may be provided with an additional circuit to form a current distribution on the radiating element or to match the feeding circuit and the radiating element. This limits the position where a circuit such as a reactance element for the second frequency band antenna is provided.
  • An object of the present invention is to provide an antenna device that also serves as a radiation element of an antenna provided for the first frequency band and that can obtain predetermined antenna characteristics for the second frequency band, and an electronic apparatus including the antenna device It is to provide.
  • the antenna device of the present invention A radiating element of the standing wave type antenna for the first frequency band, to which the first feeding circuit for the first frequency band is connected; A linear conductor connected to at least two locations of the radiating element; With A second power feeding circuit for the second frequency band is connected, and a loop portion of the magnetic field type antenna for the second frequency band is configured by a part of the radiating element and the linear conductor, An opening width of the loop portion is larger than a length on the radiating element between the two connection points of the radiating element.
  • the resonance frequency necessary for the antenna in the second frequency band can be determined. Further, an additional circuit for forming a current distribution on the radiating element or for matching the feeding circuit and the radiating element can be easily provided in the radiating element of the antenna for the first frequency band.
  • the first frequency band is higher in frequency than the second frequency band, and the first frequency band is between the radiating element and the linear conductor as compared with the second frequency band. It is preferable to provide a first frequency band cutoff element that has a higher impedance in the band. Accordingly, in the first frequency band, the radiating element is hardly affected by the linear conductor, and the radiating element acts as an antenna in the first frequency band.
  • a feed coil connected to the feed circuit for the second frequency band and magnetically coupled to the loop portion is provided.
  • the inductance of the feeding coil, the magnetic flux collection and the radiation effect can be used.
  • An electronic device of the present invention includes an antenna device and a housing,
  • the antenna device is A radiating element of the standing wave type antenna for the first frequency band, to which the first feeding circuit for the first frequency band is connected;
  • a linear conductor connected to at least two locations of the radiating element;
  • a second power feeding circuit for the second frequency band is connected, and a loop portion of the magnetic field type antenna for the second frequency band is configured by a part of the radiating element and the linear conductor, An opening width of the loop portion is larger than a length on the radiating element between the two connection points of the radiating element.
  • the circuit board may have a ground conductor, and the linear conductor may be connected to the ground conductor.
  • the ground conductor can also serve as a part of the loop portion of the magnetic field antenna for the second frequency band.
  • a housing having a conductor portion and containing the circuit board, and a part of the linear conductor may be the conductor portion.
  • the conductor portion of the housing can also serve as a part of the loop portion of the magnetic field antenna for the second frequency band.
  • the conductor portion includes a first conductor portion of the housing and a second conductor portion having a side facing the first conductor portion and conducting to the first conductor portion. May be included.
  • the long path of the conductor part of the housing can also serve as a part of the loop part of the magnetic field type antenna for the second frequency band.
  • casing can be reduced.
  • a housing having a conductor portion and containing the circuit board, and a part or all of the radiating element may be the conductor portion.
  • the conductor portion of the housing can also serve as part or all of the radiating element.
  • the present invention it is possible to determine the resonance frequency necessary for the antenna in the second frequency band. Further, an additional circuit for forming a current distribution on the radiating element or for matching the feeding circuit and the radiating element can be easily provided in the radiating element of the antenna for the first frequency band.
  • FIG. 1 is a plan view showing a configuration of an antenna device 101A according to the first embodiment and an electronic apparatus 201A including the antenna device 101A.
  • FIG. 2 is a perspective view showing the configuration of the first conductor portion 1, the second conductor portion 2, and the circuit board 10 of the housing of the electronic apparatus 201A.
  • FIG. 3A is an equivalent circuit diagram illustrating the operation of the antenna device 101A in the first frequency band.
  • FIG. 3B is an equivalent circuit diagram illustrating the operation of the antenna device 101A in the second frequency band.
  • FIG. 4 is a plan view showing configurations of an antenna device 101B and an electronic apparatus 201B as a modification of the first embodiment.
  • FIG. 5 is a plan view showing a configuration of the antenna device 102 according to the second embodiment and an electronic apparatus 202 including the antenna device 102.
  • FIG. 6 is an equivalent circuit diagram illustrating the operation of the antenna device 102 in the second frequency band.
  • FIG. 7 is a plan view showing a configuration of the antenna device 103 according to the third embodiment and an electronic apparatus 203 including the antenna device 103.
  • FIG. 8 is a plan view showing a configuration of the antenna device 104 according to the fourth embodiment and an electronic apparatus 204 including the antenna device 104.
  • FIG. 9 is a plan view illustrating a configuration of an antenna device 105 according to the fifth embodiment and an electronic apparatus 205 including the antenna device 105.
  • FIG. 10 is an equivalent circuit diagram illustrating the operation of the antenna device 105 in the second frequency band.
  • FIG. 11 is a plan view illustrating a configuration of an antenna device 106 according to the sixth embodiment and an electronic apparatus 206 including the antenna device 106.
  • FIG. 12A is an equivalent circuit diagram illustrating the operation of the antenna device 106 in the first frequency band.
  • FIG. 12B is an equivalent circuit diagram illustrating the operation of the antenna device 106 in the second frequency band.
  • FIGS. 13A and 13B are perspective views showing the first conductor portion 1 and the second conductor portion 2 of the casing of the electronic device according to the seventh embodiment.
  • the “standing wave antenna” is an antenna that generates a standing wave of current or voltage (potential) on the radiating element. That is, resonance occurs so that nodes and antinodes of current and voltage (potential) strength are generated on the radiating element. For example, due to the boundary conditions of the current and voltage (potential) on the radiating element, the current becomes 0 at the end of the radiating element, and when connected to the ground, the voltage becomes 0 at the connection with the ground.
  • Typical standing wave antennas include dipole antenna, monopole antenna, inverted L-type antenna, inverted F-type antenna (IFA), one-wavelength loop antenna, folded dipole antenna, folded monopole antenna, microstrip antenna, patch antenna , Plate inverted F type antenna (PIFA), slot antenna, notch antenna, subtypes of each antenna (multiple radiating elements connected in parallel, multiple stubs, radiating element shape changes depending on location, etc.) It is.
  • a standing wave antenna is used for communication by electromagnetic waves (radio waves) in the far field.
  • electromagnetic waves radio waves
  • it is used for telephone calls and data communication in mobile phone terminals, wireless LAN communication, satellite signal reception in GPS, and the like.
  • the “magnetic field antenna” is a kind of minute loop antenna and is an antenna that radiates magnetic flux.
  • Magnetic field type antenna is used for communication by magnetic field coupling in the near field.
  • it is used for communication such as NFC (Near field communication).
  • the “electronic device” in the present invention is a device including the standing wave antenna and the magnetic field antenna.
  • it is a mobile phone terminal, so-called smart phone, tablet terminal, notebook PC, wearable terminal (so-called smart watch, smart glass, etc.).
  • FIG. 1 is a plan view showing a configuration of an antenna device 101A according to the first embodiment and an electronic apparatus 201A including the antenna device 101A.
  • FIG. 2 is a perspective view showing the configuration of the first conductor portion 1, the second conductor portion 2, and the circuit board 10 of the housing of the electronic apparatus 201A.
  • the electronic device 201A is a portable electronic device having a communication function such as a so-called smartphone or tablet terminal.
  • the housing of the electronic device 201 ⁇ / b> A has a first conductor portion 1 and a second conductor portion 2.
  • portions for example, resin portions
  • the first conductor portion 1 and the second conductor portion 2 are, for example, a molded body of a metal plate such as an anodized aluminum plate.
  • the first conductor portion 1 has three surfaces parallel to the Z direction, and the second conductor portion 2 has three surfaces parallel to the Y direction.
  • a circuit board 10 is provided inside the housing.
  • the antenna device 101 ⁇ / b> A is configured by a circuit formed on the circuit board 10 and the first conductor portion 1 of the housing.
  • the first conductor portion 1 of the housing is used as a radiating element of a standing wave antenna for the first frequency band.
  • the circuit board 10 is provided with a first power feeding circuit 11, a first power feeding circuit 91 for the first frequency band, and second frequency band cutoff elements 12 and 13.
  • a first power supply circuit 91 for the first frequency band is connected to the connection point P9 of the first conductor portion 1 via the first power supply circuit 11.
  • the second frequency band cutoff elements 12 and 13 are connected between the connection points P1 and P2 of the first conductor portion 1 and the ground.
  • the circuit board 10 is further provided with a linear conductor 20, first frequency band cutoff elements 25, 26, a resonance capacitor 29, and a second power feeding circuit 92 for the second frequency band.
  • the first end of the linear conductor 20 is connected to the connection location P ⁇ b> 1 of the first conductor portion 1 via the connection conductor 41.
  • the second end of the linear conductor 20 is connected to the connection location P ⁇ b> 2 of the first conductor portion 1 via the connection conductor 42.
  • the connection conductors 41 and 42 are, for example, movable probe pins or conductive screws.
  • the linear conductor 20 and the connecting conductors 41 and 42 correspond to the “linear conductor” in the present invention.
  • a second power feeding circuit 92 and first frequency band cutoff elements 25 and 26 are connected in series to the linear conductor 20. Further, the resonance capacitor 29 is connected in parallel to the second power feeding circuit 92.
  • the loop portion of the magnetic field antenna for the second frequency band is configured including a part of the first conductor portion 1 of the housing and the linear conductor 20.
  • An LC parallel resonance circuit is constituted by the inductance of the loop portion and the resonance capacitor 29.
  • the opening width W2 of the loop portion is larger than the width (the length on the first conductor portion 1) W1 between the connection points P1 and P2 of the first conductor portion 1 which is a radiating element for the first frequency band.
  • the antenna device 101 ⁇ / b> A is composed of the first conductor portion 1 of the housing and the circuit formed on the circuit board 10. As will be described later, this antenna device 101A acts as a first frequency antenna by power feeding by the first frequency band power feeding circuit 91, and by feeding by the second frequency band power feeding circuit 92, the antenna for the second frequency. Acts as
  • FIG. 3A is an equivalent circuit diagram illustrating the operation of the antenna device 101A in the first frequency band.
  • the 1st electric power feeding part circuit 11 and the 2nd frequency band cutoff elements 12 and 13 which were shown in FIG. 1 are the capacitors for a 2nd frequency band cutoff, respectively.
  • the first frequency band is, for example, the UHF band or the SHF band
  • the second frequency band is the HF band. That is, the first frequency band has a higher frequency than the second frequency band.
  • the first power feeding circuit 11 and the second frequency band cut-off elements 12 and 13 each have a low impedance. Therefore, in FIG. It represents as.
  • the first frequency band cutoff elements 25 and 26 are inductors. In the first frequency band, the first frequency band cut-off elements 25 and 26 have high impedance, and are not shown as a circuit in FIG.
  • the connection points P1 and P2 of the first conductor portion 1 as the radiation element are grounded.
  • the first power supply circuit 91 is, for example, a UHF band or SHF band RFIC.
  • the first power feeding circuit 91 feeds a signal in the first frequency band to the connection point P9 of the first conductor portion 1.
  • the connection between the first conductor part 1 as a radiating element and the ground via the second frequency band cutoff elements 12 and 13 acts as a stub in the first frequency band, and the first conductor part 1 is an inverted F-type antenna or the like. Acts as a standing wave antenna.
  • the connecting portion between the first conductor portion 1 as the radiating element and the ground via the second frequency band cutoff elements 12 and 13 acts as a stub as described above, the stub causes the feeding circuit 91 and Impedance matching is performed with the antenna.
  • FIG. 3B is an equivalent circuit diagram illustrating the operation of the antenna device 101A in the second frequency band.
  • the first power feeding circuit 11 in the second frequency band (HF band), the first power feeding circuit 11 has a high impedance, and therefore, in FIG. 3B, the first power feeding circuit 11 and the first power feeding circuit 91 are shown. Absent.
  • a loop portion of the magnetic field antenna for the second frequency band is constituted by the connection portions P1 and P2 of the first conductor portion 1, the connection conductors 41 and 42, the first frequency band cutoff elements 25 and 26, and the linear conductor 20.
  • the An LC parallel resonance circuit is constituted by the inductance of the loop portion and the resonance capacitor 29.
  • the second power supply circuit 92 is, for example, an HF band RFIC. The second power supply circuit 92 supplies power to the LC parallel resonance circuit.
  • the parallel LC resonance circuit is hardly affected in the second frequency band.
  • the loop section acts as a magnetic field antenna for the second frequency band.
  • the length of the loop portion in the second frequency band (HF band), is sufficiently short with respect to the wavelength, preferably not more than one-tenth of the wavelength, so the loop portion is minute for communication by magnetic field coupling. It is a loop antenna.
  • the length of the loop portion In the second frequency band (HF band), the length of the loop portion is sufficiently short with respect to the wavelength, so that the radiation resistance is low, and in the second frequency band (HF band), the loop portion hardly emits electromagnetic waves.
  • FIG. 4 is a plan view showing a configuration of an antenna device 101B and an electronic apparatus 201B as a modification of the first embodiment.
  • the shape of the linear conductor 20 is different from the example shown in FIG.
  • the range in which the linear conductor 20 is formed is widened along the main extending direction of the first conductor portion 1 on both sides from between the connection points P1 and P2.
  • the range in which the linear conductor 20 is formed extends from one side of the connection points P1 and P2 along the main extending direction of the first conductor portion 1.
  • the opening width W2 of the loop portion is a width (a length on the first conductor portion 1) W1 between the connection points P1 and P2 of the first conductor portion 1 which is a radiating element for the first frequency band. Greater than.
  • the standing wave antenna and the magnetic field antenna hold even when transmission and reception are reversed by the reversibility theorem (reciprocity theorem) of the antenna. That is, the standing wave antenna and the magnetic field antenna are used for transmission, reception, or both.
  • the first power feeding circuit 91 is a first frequency band receiving circuit
  • the second power feeding circuit 92 is a second frequency band receiving circuit.
  • the first power supply circuit 11 may be an impedance matching circuit, a filter, a switch, or a circuit including these in addition to a capacitor that cuts off the second frequency band (HF band).
  • the second frequency band cutoff elements 12 and 13 may be an impedance matching circuit, a filter, a switch, or a circuit including these in the first frequency, in addition to the capacitor having a high impedance in the second frequency band (HF band). Good.
  • the second power feeding circuit 92 may be a power feeding circuit including an impedance matching circuit, a filter, a balun, and the like in the second frequency band in addition to the second frequency band RFIC.
  • the entire first conductor portion 1 used as the radiating element in the first frequency band but a part thereof is used as a part of the loop of the magnetic field type antenna for the second frequency band.
  • the resonance frequency required for an antenna in the second frequency band can be easily determined.
  • a loop having a side larger than at least the connection points P1 and P2 on the radiating element is formed, the opening of the coil becomes large, and the area of radiation and collection of magnetic flux is widened.
  • an additional circuit such as a circuit for forming a current distribution on the radiating element or a circuit for matching the feeding circuit and the radiating element can be easily provided in the first conductor portion 1 used as the radiating element in the first frequency band. Can be provided.
  • the first conductor portion 1 used as a radiating element is disposed at the tip of the electronic device 201A. Therefore, since the loop of the magnetic field antenna for the second frequency band is also the tip of the electronic apparatus 201A, the loop of the magnetic field antenna for the second frequency band is easily brought close to the magnetic field antenna of the external electronic apparatus and communication is facilitated. .
  • Second Embodiment an antenna device and an electronic apparatus in which the configuration of the linear conductor is different from that in the first embodiment will be described.
  • FIG. 5 is a plan view showing a configuration of the antenna device 102 according to the second embodiment and an electronic apparatus 202 including the antenna device 102.
  • the circuit board 10 includes a first power feeding circuit 11, a first power feeding circuit 91 for the first frequency band, second frequency band cutoff elements 12 and 13, linear conductors 21 and 22, a first frequency band cutoff element 25, 26, a resonance capacitor 29, and a second power feeding circuit 92 for the second frequency band are provided.
  • the first end of the linear conductor 21 is connected to the connection point P1 of the first conductor portion 1 via the connection conductor 41, and the second end is grounded to the ground.
  • the first end of the linear conductor 22 is connected to the connection location P2 of the first conductor portion 1 via the connection conductor 42, and the second end is grounded.
  • the second feeder circuit 92 is connected in series to the linear conductor 22. Accordingly, the second frequency band is defined by the connection points P1 and P2 of the first conductor portion 1, the connection conductors 41 and 42, the first frequency band cutoff elements 25 and 26, the linear conductors 21 and 22 and the ground conductor of the circuit board 10.
  • the loop portion of the magnetic field type antenna is configured.
  • a ground conductor is formed on the circuit board 10 so that the ground conductor spreading in a planar shape does not overlap in the loop portion. Therefore, the ground conductor does not electromagnetically block the opening of the loop part, and the loop part acts as a magnetic field antenna.
  • the opening width W2 of the loop portion is larger than the width (the length on the first conductor portion 1) W1 between the connection points P1 and P2 of the first conductor portion 1 which is a radiating element for the first frequency band.
  • Other configurations are the same as those of the antenna device 101A shown in FIG. 1 in the first embodiment.
  • FIG. 6 is an equivalent circuit diagram showing the operation of the antenna device 102 in the second frequency band. Unlike the equivalent circuit shown in FIG. 3B in the first embodiment, between the connection points P1 and P2 of the first conductor portion 1, the first frequency band cutoff elements 25 and 26, the linear conductors 21 and 22, and the ground The conductor constitutes the loop portion of the magnetic field antenna for the second frequency band. The loop portion is grounded to the ground.
  • the loop portion acts as a magnetic field antenna for the second frequency band.
  • the formation area of the linear conductor can be reduced.
  • the first end of the linear conductor 21 is connected to the connection location P1 of the first conductor portion 1 via the connection conductor 41, and the second end is grounded to the ground.
  • the first end of the linear conductor 22 is connected to the connection location P2 of the first conductor portion 1 via the connection conductor 42, and the second end is grounded. That is, the first conductor portion 1 and the ground are connected via the connection conductors 41 and 42 and the linear conductors 21 and 22.
  • the first conductor portion 1 and the ground may be connected by connection conductors 41 and 42 made of a movable probe pin, a conductive screw, or the like.
  • the connection conductors 41 and 42 correspond to the “linear conductor” in the present invention.
  • FIG. 7 is a plan view showing a configuration of an antenna device 103 according to the third embodiment and an electronic apparatus 203 including the antenna device 103.
  • the circuit board 10 includes a first power feeding circuit 11, a first power feeding circuit 91 for the first frequency band, second frequency band cutoff elements 12 and 13, linear conductors 21 and 22, a first frequency band cutoff element 25, 26, a resonance capacitor 29, and a second power feeding circuit 92 for the second frequency band are provided.
  • the first end of the linear conductor 21 is connected to the connection point P1 of the first conductor portion 1 via the connection conductor 41, and the second end is connected to the second conductor portion 2 of the housing via the movable probe pin 31. It is connected.
  • the first end of the linear conductor 22 is connected to the connection point P2 of the first conductor portion 1 via the connection conductor 42, and the second end is connected to the second conductor portion 2 of the housing via the movable probe pin 32. It is connected.
  • the second feeder circuit 92 is connected in series to the linear conductor 22.
  • the loop part of the magnetic field type antenna for frequency bands is comprised.
  • the opening width W2 of the loop portion is larger than the width (the length on the first conductor portion 1) W1 between the connection points P1 and P2 of the first conductor portion 1 which is a radiating element for the first frequency band.
  • Other configurations are the same as those of the antenna device 101A shown in FIG. 1 in the first embodiment.
  • the loop part acts as a magnetic field antenna for the second frequency band.
  • the formation area of the linear conductor on the circuit board 10 can be reduced.
  • FIG. 8 is a plan view showing a configuration of an antenna device 104 according to the fourth embodiment and an electronic apparatus 204 including the antenna device 104.
  • linear conductors 21A, 21B, and 22 are formed on the circuit board 10.
  • the linear conductors 21A and 22 are formed on the front surface of the circuit board 10, and the linear conductor 21B is formed inside or on the back surface of the circuit board 10.
  • Other configurations are the same as those of the antenna device 102 shown in FIG. 5 in the second embodiment.
  • the total length of the linear conductor is increased and the number of turns of the loop portion is increased, so that a predetermined inductance can be obtained without increasing the occupied area of the loop portion.
  • the radiation of magnetic flux and the magnetic flux collection effect in the second frequency band antenna can be increased.
  • FIG. 9 is a plan view showing a configuration of an antenna device 105 according to the fifth embodiment and an electronic apparatus 205 including the antenna device 105.
  • the magnetic field type antenna for the second frequency band is mainly shown, and the antenna for the first frequency band is the same as the embodiment shown so far, so that the illustration is omitted here. Yes.
  • the circuit board 10 is provided with linear conductors 21 and 22, first frequency band cutoff elements 25 and 26, a resonance capacitor 29, and a second power supply circuit 92 for the second frequency band.
  • the second power supply circuit 92 includes a power supply coil 92C and a second power supply circuit unit 92A connected to the power supply coil 92C.
  • the feeding coil 92 ⁇ / b> C is formed by forming a helical coil with a conductor pattern on a laminate of magnetic layers.
  • the feeding coil 92 ⁇ / b> C is mounted on the circuit board 10 so that the helical coil is magnetically coupled and electric field coupled to the linear conductor 21.
  • the first end of the linear conductor 21 is connected to the connection point P1 of the first conductor portion 1 via the connection conductor 41, and the second end is grounded to the ground.
  • the first end of the linear conductor 22 is connected to the connection location P2 of the first conductor portion 1 via the connection conductor 42, and the second end is grounded.
  • the resonance capacitor 29 is connected in series to the linear conductor 21. Accordingly, the second frequency band is defined by the connection points P1 and P2 of the first conductor portion 1, the connection conductors 41 and 42, the first frequency band cutoff elements 25 and 26, the linear conductors 21 and 22 and the ground conductor of the circuit board 10.
  • the loop portion of the magnetic field type antenna is configured.
  • the loop unit and the resonance capacitor 29 constitute an LC series resonance circuit.
  • FIG. 10 is an equivalent circuit diagram showing the operation of the antenna device 105 in the second frequency band.
  • the portion of the linear conductor 21 that is coupled to the feeding coil 92C is represented by the coil 21C.
  • a signal in the second frequency band is fed to the loop portion by the coupling of the coil 21C and the feeding coil 92C.
  • the LC series resonance circuit is configured by the inductance of the loop portion and the capacitor of the resonance capacitor 29, the impedance becomes low at the resonance frequency, and a strong current can flow through the loop portion.
  • the location where the feeding coil 92C is coupled can be anywhere on the loop portion. For example, it may be between the connection places P1 and P2 of the first conductor portion 1 or the connection conductors 41 and 42. However, since the linear conductors 21 and 22 and the connection conductors 41 and 42 are thinner than the first conductor portion 1, they can be strongly coupled. Further, if the wiring pattern is circulated, it can be more strongly coupled.
  • the feeding coil 92C is at least magnetically coupled to the loop portion, so that the feeding coil and the loop portion are electrically connected.
  • the present invention is limited to this configuration. is not.
  • a part of the electrodes constituting the loop portion and the electrode of the feeding coil 92C may be formed as an insulator and configured as an integral part as a transformer element.
  • FIG. 11 is a plan view showing a configuration of an antenna device 106 according to the sixth embodiment and an electronic apparatus 206 including the antenna device 106.
  • the first conductor portion 1 and the second conductor portion 2 of the housing are connected via a linear conductor 21.
  • the linear conductor 21 is provided integrally with the first conductor portion 1 and the second conductor portion 2 of the housing.
  • the circuit board 10 includes a first power feeding circuit 11, a first power feeding circuit 91 for the first frequency band, a linear conductor 22, a first frequency band cutoff element 26, a resonance capacitor 29, and a second frequency band first.
  • a two-feed circuit 92 is provided.
  • the first end of the linear conductor 22 is connected to the connection point P2 of the first conductor portion 1 via the connection conductor 42, and the second end is connected to the second conductor portion 2 of the housing via the movable probe pin 32. It is connected.
  • the second feeder circuit 92 is connected in series to the linear conductor 22. Therefore, between the connection place P1 and the connection place P2 of the first conductor part 1, the connection conductor 42, the first frequency band cutoff element 26, the linear conductor 22 and the second conductor part 2 of the casing, the second frequency band.
  • the loop portion of the magnetic field type antenna is configured.
  • the opening width W2 of the loop portion is larger than the width (length on the first conductor portion 1) W1 between the connection points P1 and P2 of the first conductor portion 1.
  • FIG. 12A is an equivalent circuit diagram illustrating the operation of the antenna device 106 in the first frequency band.
  • the first power supply circuit 11 shown in FIG. 11 is a capacitor for blocking the second frequency band.
  • the first power feeding unit circuit 11 In the first frequency band (UHF band or SHF band), the first power feeding unit circuit 11 has a low impedance, and therefore, it is shown as a directly connected circuit in FIG.
  • the first frequency band cutoff element 26 is an inductor. In the first frequency band, the first frequency band cut-off element 26 has a high impedance and is not shown as a circuit in FIG.
  • the connection point P1 of the first conductor portion 1 as a radiation element is grounded.
  • the first power supply circuit 91 is, for example, a UHF band or SHF band RFIC.
  • the first power feeding circuit 91 feeds a signal in the first frequency band to the connection point P9 of the first conductor portion 1.
  • the first conductor portion 1 acts as an inverted F-type antenna.
  • FIG. 12B is an equivalent circuit diagram illustrating the operation of the antenna device 106 in the second frequency band.
  • the first power feeding unit circuit 11 in the second frequency band (HF band), the first power feeding unit circuit 11 has a high impedance. Therefore, in FIG. 12B, the first power feeding unit circuit 11 and the first power feeding circuit 91 are shown. Absent.
  • the loop portion of the magnetic field type antenna for the second frequency band is configured by including the first frequency band cutoff element 26 and the linear conductor 22 between the connection points P1 and P2 of the first conductor part 1.
  • An LC parallel resonance circuit is constituted by the inductance of the loop portion and the resonance capacitor 29.
  • the second power supply circuit 92 is, for example, an HF band RFIC. The second power supply circuit 92 supplies power to the LC parallel resonance circuit.
  • the connecting portion between the first conductor portion 1 and the second conductor portion 2 of the housing may be a part of the linear conductor.
  • FIGS. 13A and 13B are perspective views showing the first conductor portion 1 and the second conductor portion 2 of the casing of the electronic device according to the seventh embodiment.
  • a portion (for example, a resin portion) other than the first conductor portion 1 and the second conductor portion 2 of the housing is not shown.
  • a circuit board 10 is provided inside the housing.
  • the first conductor portion 1 has three surfaces parallel to the Y direction, and covers the periphery of one end of the circuit board 10 over the three surfaces.
  • the first conductor portion 1 covers the periphery of one end of the circuit board 10 over four surfaces.
  • the first conductor portion 1 has a component distributed around the Y axis.
  • the shape of the first conductor portion 1 and the second conductor portion 2 of the housing acts as a radiating element of the standing wave antenna for the first frequency band, and for the second frequency band.
  • the loop portion of the magnetic field type antenna it can be changed as appropriate.
  • the loop surface of the loop portion of the magnetic field type antenna for the second frequency band is a component inclined from the XY plane. Have This can also determine the directivity of the magnetic field antenna.
  • planar shape of the first conductor portion 1, the second conductor portion 2, and the circuit board 10 of the housing is a rectangle is shown, but the present invention is not limited to this shape. Absent. These may be partially or entirely curved.
  • the feeding circuit is directly connected to the linear conductor.
  • a transformer (balun) is provided between the HF band RFIC as the second feeding circuit 92 and the linear conductor. You may connect via. Therefore, balanced / unbalanced conversion or impedance matching may be performed.
  • a linear conductor is formed on a circuit board different from the circuit board on which the first power feeding circuit 11, the first power feeding circuit for the first frequency band, the second power feeding circuit for the second frequency band, and the like are mounted.
  • the linear conductor may be composed of a wire or the like.
  • the loop portion acts as a magnetic field radiation antenna that contributes to magnetic field radiation for near-field communication in the HF band (second frequency band), but the present invention has this configuration. It is not limited.
  • the loop portion can also be used as a power receiving antenna or a power transmitting antenna of a non-contact power transmission system using at least magnetic field coupling such as an electromagnetic induction type non-contact power transmission system or a magnetic resonance type non-contact power transmission system.
  • the loop unit is a power transmission antenna
  • the second power feeding circuit is a power transmission circuit that supplies power to the power transmission antenna.
  • the loop unit is a power receiving antenna
  • the second power feeding circuit is a power receiving circuit that supplies power from the power receiving antenna to a load in the power receiving device.

Landscapes

  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)

Abstract

L'objet de l'invention est équipé : d'une première partie conducteur (1) qui consiste en un élément rayonnant d'une antenne type à onde stationnaire pour une première bande de fréquence, auquel est connecté un premier circuit d'alimentation (91) pour première bande de fréquence ; et d'un conducteur linéaire (20) dont une partie ou l'ensemble est formé sur un substrat de circuit, et qui est connecté en au moins deux points (P1, P2) de la première partie conducteur (1). En outre, une partie boucle d'une antenne de type à champ magnétique pour une seconde bande de fréquence, est configurée par connexion d'un second circuit d'alimentation (92) pour seconde bande de fréquence et au moyen d'une partie de la première partie conducteur (1) et du conducteur linéaire (20). La largeur d'ouverture (W2) de la partie boucle, est supérieure à la longueur (W1) de l'élément rayonnant (1) entre les points de connexion (P1, P2) de l'élément rayonnant.
PCT/JP2016/064544 2015-05-19 2016-05-17 Dispositif d'antenne, et appareil électronique WO2016186091A1 (fr)

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JP2015-101831 2015-05-19
JP2015101831 2015-05-19

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2018101284A1 (fr) * 2016-11-29 2018-06-07 株式会社村田製作所 Dispositif d'antenne et instrument électronique
WO2023140320A1 (fr) * 2022-01-20 2023-07-27 タイコエレクトロニクスジャパン合同会社 Composite d'antenne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113519091B (zh) * 2019-03-04 2022-10-25 株式会社村田制作所 通信装置

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US20140139380A1 (en) * 2012-11-19 2014-05-22 Apple Inc. Shared Antenna Structures for Near-Field Communications and Non-Near-Field Communications Circuitry
WO2014098024A1 (fr) * 2012-12-21 2014-06-26 株式会社村田製作所 Dispositif d'antenne et dispositif électronique

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Publication number Priority date Publication date Assignee Title
US20140139380A1 (en) * 2012-11-19 2014-05-22 Apple Inc. Shared Antenna Structures for Near-Field Communications and Non-Near-Field Communications Circuitry
WO2014098024A1 (fr) * 2012-12-21 2014-06-26 株式会社村田製作所 Dispositif d'antenne et dispositif électronique

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018101284A1 (fr) * 2016-11-29 2018-06-07 株式会社村田製作所 Dispositif d'antenne et instrument électronique
JPWO2018101284A1 (ja) * 2016-11-29 2019-04-25 株式会社村田製作所 アンテナ装置および電子機器
CN109716583A (zh) * 2016-11-29 2019-05-03 株式会社村田制作所 天线装置以及电子设备
CN109716583B (zh) * 2016-11-29 2020-09-04 株式会社村田制作所 天线装置以及电子设备
CN112002993A (zh) * 2016-11-29 2020-11-27 株式会社村田制作所 天线装置以及电子设备
CN112002992A (zh) * 2016-11-29 2020-11-27 株式会社村田制作所 天线装置以及电子设备
US11128046B2 (en) 2016-11-29 2021-09-21 Murata Manufacturing Co., Ltd. Antenna device and electronic equipment
CN112002993B (zh) * 2016-11-29 2023-09-19 株式会社村田制作所 天线装置以及电子设备
CN112002992B (zh) * 2016-11-29 2024-03-08 株式会社村田制作所 天线装置以及电子设备
WO2023140320A1 (fr) * 2022-01-20 2023-07-27 タイコエレクトロニクスジャパン合同会社 Composite d'antenne

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