WO2011108339A1 - Module de radiocommunication, dispositif de radiocommunication et terminal de radiocommunication - Google Patents

Module de radiocommunication, dispositif de radiocommunication et terminal de radiocommunication Download PDF

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Publication number
WO2011108339A1
WO2011108339A1 PCT/JP2011/052593 JP2011052593W WO2011108339A1 WO 2011108339 A1 WO2011108339 A1 WO 2011108339A1 JP 2011052593 W JP2011052593 W JP 2011052593W WO 2011108339 A1 WO2011108339 A1 WO 2011108339A1
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WO
WIPO (PCT)
Prior art keywords
antenna pattern
electrode
wireless communication
auxiliary electrode
loop
Prior art date
Application number
PCT/JP2011/052593
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English (en)
Japanese (ja)
Inventor
登 加藤
博美 村山
Original Assignee
株式会社村田製作所
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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 JP2012503047A priority Critical patent/JP5403145B2/ja
Publication of WO2011108339A1 publication Critical patent/WO2011108339A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
    • G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
    • 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
    • H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
    • 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
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/10—Bump connectors; Manufacturing methods related thereto
    • H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
    • H01L2224/161—Disposition
    • H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/181—Encapsulation

Definitions

  • the present invention relates to a wireless communication module, a wireless communication device, and a wireless communication terminal, and more particularly to a wireless communication module, a wireless communication device, and a wireless communication terminal used in an RFID (Radio Frequency Identification) system.
  • RFID Radio Frequency Identification
  • the RFID tag includes a wireless IC that stores predetermined information and processes predetermined wireless signals, and an antenna that transmits and receives high-frequency signals.
  • Patent Document 1 describes a wireless IC device used in an RFID system.
  • This wireless IC device has a power supply circuit board on which a wireless IC chip is mounted, and this power supply circuit board is mainly magnetically coupled to a radiation plate (antenna pattern).
  • the frequency of the transmission / reception signal is determined by the power supply circuit built in the power supply circuit board, the operating frequency is stable without depending on the size of the antenna pattern, the material of the holding member of the device, etc. Frequency characteristics.
  • the power feeding circuit described in Patent Document 1 includes an inductance element and a capacitance element, and transmits and receives high-frequency signals by magnetically coupling the inductance element and the antenna pattern.
  • the magnetic field by the inductance element is disturbed, and the resonance frequency characteristic of the inductance element is changed. For this reason, high positional accuracy is required for the power supply circuit board, resulting in a decrease in production efficiency.
  • an object of the present invention is to provide a wireless communication module, a wireless communication device, and a wireless communication terminal that can relax the positional accuracy of the power supply circuit board with respect to the antenna pattern and can increase the production efficiency.
  • the wireless communication module is A wireless IC for processing wireless signals;
  • a power supply circuit board including a loop electrode and an auxiliary electrode coupled to the wireless IC;
  • the loop electrode is formed by winding a coil pattern,
  • the auxiliary electrode is disposed so as to overlap at least a part of the loop electrode when viewed in plan from the coil axis direction, and at least a part is formed with a slit that divides the auxiliary electrode into a plurality of parts, It is characterized by.
  • the wireless communication device is: A wireless IC for processing wireless signals; A power supply circuit board including a loop electrode and an auxiliary electrode coupled to the wireless IC; An antenna pattern coupled to the loop electrode and the auxiliary electrode; With The loop electrode is formed by winding a coil pattern, The auxiliary electrode is disposed so as to overlap at least a part of the loop electrode when viewed in plan from the coil axis direction, and at least a part is formed with a slit that divides the auxiliary electrode into a plurality of parts, The loop electrode is arranged so that at least a part thereof overlaps with the antenna pattern when viewed in plan from the coil axis direction, The auxiliary electrode is arranged so that at least a part thereof overlaps the loop electrode and the antenna pattern when viewed in plan from the coil axis direction, and at least one of the slits does not overlap the antenna pattern. Being placed, It is characterized by.
  • a wireless communication terminal includes the wireless communication device.
  • the loop electrode formed by winding the coil pattern and the antenna pattern are magnetically coupled, and the auxiliary electrode and the antenna pattern are magnetically coupled. Then, a high frequency signal is transmitted and received between the wireless IC and the antenna pattern via the loop electrode and the auxiliary electrode. Since the auxiliary electrode is formed with a slit that divides the auxiliary electrode into a plurality of portions, a potential difference occurs in the induced current generated in the auxiliary electrode, and the auxiliary electrode and the antenna pattern are coupled. As described above, the auxiliary electrode arranged so as to overlap the loop electrode can suppress the magnetic field generated by the loop electrode from being disturbed by the antenna pattern. As a result, even if the mounting position of the power supply circuit board with respect to the antenna pattern is slightly deviated, the resonance frequency characteristic does not fluctuate, and the position accuracy of the power supply circuit board is relaxed.
  • the positional accuracy of the feeder circuit board with respect to the antenna pattern is relaxed, and the production efficiency can be increased.
  • (A) is a comparative example and (B) is an example of the present invention.
  • the wireless communication device which is 1st Example is shown,
  • (A) is a perspective view,
  • (B) is sectional drawing.
  • the antenna pattern which comprises 1st Example is shown,
  • (A) is a front view,
  • (B) is a back view.
  • positioning relationship of the feeder circuit board with respect to the antenna pattern in 1st Example is shown, (A) is sectional drawing, (B) is a top view which shows the arrangement
  • FIG. 7 shows a wireless communication module according to a seventh embodiment, wherein (A) is a cross-sectional view, and (B) is a cross-sectional view showing a wireless communication device equipped with the wireless communication module.
  • wireless communication device shown in FIG. 18 is shown, (A) is a front view, (B) is a back view.
  • FIG. 1A shows a coupling state as a comparative example.
  • a wireless communication device is roughly coupled to a wireless IC chip 10 for processing a wireless signal and the wireless IC chip 10, and coil patterns 21a to 21d have a predetermined width W1.
  • the antenna pattern 35 that is magnetically coupled to the loop electrode 20 (which may be electromagnetic coupling, the same applies hereinafter). The specific shapes of the loop electrode 20 and the antenna pattern 35 will be described in detail in the first embodiment below.
  • the loop electrode 20 is arranged so as not to overlap the antenna pattern 35 in plan view. Accordingly, the magnetic field ⁇ 1 due to the antenna pattern 35 is formed as indicated by a dotted line, and the magnetic field ⁇ 2 due to the loop electrode 20 is formed as indicated by a dashed line and is magnetically coupled to each other.
  • a metal body is close to the lower side of the antenna pattern 35, a position where communication cannot be performed due to disturbance of the magnetic field, that is, a null point may be formed, and the communication distance may be shortened or communication may be poor.
  • the auxiliary electrode 26 is provided on the feeder circuit board 15 so as to overlap the loop electrode 20 (coil patterns 21a to 21d) in plan view.
  • the auxiliary electrode 26 is divided into a plurality of slits 26a (see FIG. 5).
  • the loop electrode 20 is arranged so that at least a part of the winding width W1 of the coil patterns 21a to 21d overlaps the width W2 of the antenna pattern 35 when viewed in plan from the axial direction, and the auxiliary electrode 26 is also at least one.
  • the portion is disposed so as to overlap the antenna pattern 35, and at least one slit 26 a is disposed so as not to overlap the antenna pattern 35.
  • the loop electrode 20 and the antenna pattern 35 are magnetically coupled to transmit and receive a high frequency signal between the wireless IC chip 10 and the antenna pattern 35.
  • the auxiliary electrode 26 and the antenna pattern 35 are magnetically coupled (which may be electromagnetic coupling, the same applies hereinafter), and high-frequency signals are transmitted and received between the wireless IC chip 10 and the antenna pattern 35. Since the auxiliary electrode 26 is formed with a slit 26a that divides the auxiliary electrode 26 into a plurality of parts, a potential difference occurs in the induced current generated in the auxiliary electrode 26, and the auxiliary electrode 26 and the antenna pattern 35 are coupled. Become.
  • the auxiliary electrode 26 arranged so as to overlap the loop electrode 20 determines the magnetic field by the loop electrode 20 to some extent, and suppresses the disturbance of the magnetic field by the loop electrode 20 by the antenna pattern 35. Can do. As a result, even if the mounting position of the power feeding circuit board 15 with respect to the antenna pattern 35 is slightly deviated, the resonance frequency characteristics do not fluctuate, and the position accuracy of the power feeding circuit board is relaxed.
  • the loop electrode 20 and the auxiliary electrode 26 are arranged so that at least a part thereof overlaps with the antenna pattern 35, the loop electrode 20 and the auxiliary electrode 26 and the antenna pattern 35 each have a magnetic field ⁇ 3 indicated by a dotted line. Even if a metal body is close to the lower side of the antenna pattern 35, at least the magnetic fields ⁇ 3a and ⁇ 3b are not disturbed, and there is no problem in coupling the two.
  • the loop electrode 20 and the auxiliary electrode 26 are not connected in a DC manner, but are connected via a magnetic field and an electric field. However, it may be connected in a DC manner.
  • the wireless communication device 1 As shown in FIG. 2, the wireless communication device 1 according to the first embodiment is used in the 13.56 MHz band, and is electrically connected to the wireless IC chip 10 that processes wireless signals and the wireless IC chip 10.
  • the feeder circuit board 15 including the loop electrode 20 and the auxiliary electrode 26 (see FIGS. 4 and 5) in which the coil patterns 21a to 21d are wound with a predetermined width W1 (see FIG. 5), and the loop electrode 20 And an antenna pattern 35 magnetically coupled to the auxiliary electrode 26.
  • a combination of the wireless IC chip 10 and the power supply circuit board 15 is referred to as a wireless communication module 5.
  • the IC chip 10 includes a clock circuit, a logic circuit, a memory circuit, and the like, and necessary information is stored in the memory.
  • input terminal electrodes and output terminal electrodes provided on the back surface thereof are electrically connected to both ends of the loop electrode 20.
  • the antenna pattern 35 is formed by winding three turns in the shape of a coil on the front and back surfaces of a flexible base substrate 36 made of PET or the like, and both ends are opened.
  • FIG. The antenna pattern 35 on the side is shown, and FIG. 3B shows the antenna pattern 35 on the back side as seen through from the front side.
  • the antenna patterns 35 on the front and back sides have the same line width W2, are overlapped in a plan view and are capacitively coupled via the base substrate 36, and currents flow in the same direction.
  • the antenna pattern 35 is formed of a metal material mainly composed of Ag, Cu or the like, and may be formed by patterning a metal film by a photolithography method or an etching method, or may be formed by screen printing a conductive paste. May be.
  • the feeder circuit board 15 has a cavity 16 at the center, and the cavity 16 accommodates the wireless IC chip 10 and is filled with a sealing material 17. .
  • the power supply circuit board 15 incorporates a loop electrode 20 and an auxiliary electrode 26 in which a plurality of coil patterns 21a to 21d are laminated in a multilayer manner.
  • the auxiliary electrode 26 is disposed between the loop electrode 20 and the antenna pattern 35.
  • a plurality of base material layers 18a to 18e are laminated, pressure-bonded, and fired as necessary.
  • the base material layers 18a to 18e may be an insulator (dielectric material, magnetic material), a thermoplastic resin such as a liquid crystal polymer, or a thermosetting resin such as an epoxy polymer.
  • an opening 25 is formed at the center, and a coil pattern 21a having pads 21a-1 and 21a-2 at both ends is formed.
  • an opening 25 is formed at the center, and a coil pattern 21b and pads 22 having pads 21b-1 and 21b-2 are formed at both ends.
  • an opening 25 is formed at the center, and a coil pattern 21c and pads 22 having pads 21c-1 and 21c-2 are formed at both ends.
  • a coil pattern 21d and a land 23b having a land 23a at one end and a pad 21d-1 at the other end are formed on the fourth base layer 18d.
  • An auxiliary electrode 26 is formed on the lowermost base material layer 18e.
  • the auxiliary electrode 26 has a wide loop shape having the same inner periphery and outer periphery as the coil patterns 21a to 21d, and is divided into four equal areas by four slits 26a.
  • These coil patterns, pads, lands, and auxiliary electrodes are made of a metal material mainly composed of Ag, Cu, etc., and may be formed by patterning a metal film by a photolithography method or an etching method, or may be conductive.
  • the paste may be formed by screen printing.
  • the pad 21d-1 of the coil pattern 21d is connected to the pad 21c-1 of the third layer coil pattern 21c via the interlayer conductor, and the coil pattern 21c.
  • the end pad 21c-2 is connected to the pad 21b-1 of the second layer coil pattern 21b through an interlayer conductor.
  • the other end pad 21b-2 of the coil pattern 21b is connected to the pad 21a-1 of the uppermost coil pattern 21a through an interlayer conductor.
  • the other end pad 21 a-2 of the uppermost coil pattern 21 a is connected to a land 23 b provided on the lowermost layer via an interlayer conductor or pad 22.
  • the opening 25 forms a cavity 16, and the wireless IC chip 10 accommodated in the cavity 16 has an input terminal electrode on the land 23b, an output terminal electrode on the land 23a, a solder bump 29 (see FIG. 4), etc. Connected with.
  • the rectangular loop electrode 20 is formed in a plan view.
  • the predetermined width W1 around which the coil patterns 21a to 21d are wound is a width from the inner peripheral pattern to the outer peripheral pattern.
  • the current flows through the coil patterns 21a to 21d in the first direction indicated by the arrow x and in the second direction indicated by the arrow y opposite to the first direction. That is, each of the coil patterns 21a to 21d is wound so that a current flows in the same direction in a portion adjacent to the stacking direction.
  • a region extending in the first direction x is referred to as a first region X
  • a region extending in the second direction y is a second region Y. Called.
  • the feeder circuit board 15 is disposed to face the inner corner portion of the antenna pattern 35 on the front surface (see FIG. 3A), and is attached with an insulating adhesive 19 (see FIG. 3). 6 (A)).
  • the arrangement relationship in the vertical direction of the loop electrode 20 and the auxiliary electrode 26 with respect to the antenna pattern 35 is as shown in FIG. 6A.
  • the first region X is arranged so as to overlap the antenna pattern 35, and the second region Y is The antenna pattern 35 is arranged so as not to overlap.
  • the first direction x (the line length direction of the coil patterns 21a to 21d) and the line length direction of the antenna pattern 35 coincide with each other. As shown in FIG.
  • the auxiliary electrode 26 is disposed so that two sides thereof overlap the antenna pattern 35, the two slits 26a overlap the antenna pattern 35, and the other two slits 26a are antenna patterns. 35 is arranged so as not to overlap. Further, the predetermined width W1 of the loop electrode 20 is preferably the same as or smaller than the width W3 of the auxiliary electrode 26 (see FIG. 5).
  • the first region X of the loop electrode 20 is magnetically coupled to the antenna pattern 35. Further, the auxiliary electrode 26 and the antenna pattern 35 are magnetically coupled. Therefore, the high frequency signal radiated from the reader / writer of the RFID system and received by the antenna pattern 35 is supplied to the wireless IC chip 10 via the loop electrode 20 and the auxiliary electrode 26, and the wireless IC chip 10 operates. On the other hand, a response signal from the wireless IC chip 10 is transmitted to the antenna pattern 35 via the loop electrode 20 and the auxiliary electrode 26 and is radiated to the reader / writer.
  • An LC resonance circuit is formed by the loop electrode 20 and the auxiliary electrode 26, and the frequency of the high-frequency signal transmitted from the antenna pattern 35 and the frequency of the high-frequency signal received by the antenna pattern 35 are substantially determined by this resonance frequency. Is done.
  • a resonance circuit having a predetermined frequency is formed by the inductance component by the coil patterns 21a to 21d and the capacitance component between the lines, and an impedance matching circuit between the wireless IC chip 10 and the antenna pattern 35 is formed. Also works.
  • the loop electrode 20 has its resonance frequency and impedance adjusted by adjusting its electrical length and pattern width.
  • the auxiliary electrode 26 is formed with a slit 26a that divides the auxiliary electrode 26 into a plurality of parts, a potential difference is generated in the induced current generated in the auxiliary electrode 26, and the auxiliary electrode 26 and the antenna pattern 35 are coupled. It will be. As described above, the auxiliary electrode 26 disposed so as to overlap the loop electrode 20 can suppress the magnetic field generated by the loop electrode 20 from being disturbed by the antenna pattern 35. As a result, even if the mounting position of the power feeding circuit board 15 with respect to the antenna pattern 35 is slightly deviated, the resonance frequency characteristics do not fluctuate, and the position accuracy of the power feeding circuit board is relaxed.
  • the first region X extending in the first direction x of the loop electrode 20 is disposed so as to overlap the antenna pattern 35 and is magnetically coupled. Even if the body is close, the magnetic field coupling between the loop electrode 20 and the antenna pattern 35 is maintained in the overlapping portion, and there is no problem in coupling the two.
  • the arrangement of the feeder circuit board 15 in the directions of arrows a and b with respect to the antenna pattern 35 is such that the inner peripheral edge of the loop electrode 20 faces the inner peripheral edge of the antenna pattern 35.
  • the auxiliary electrode 26 suppresses fluctuations in the inductance value due to the positional relationship between the loop electrode 20 and the antenna pattern 35, the coil patterns 21a to 21d are within this range where the loop electrode 20 and the antenna pattern 35 face each other. The inductance value does not fluctuate. Therefore, the positional accuracy of the feeder circuit board 15 is greatly relaxed.
  • the first direction x (the line length direction of the coil patterns 21a to 21d) and the line length direction of the antenna pattern 35 coincide with each other, the current flows through the coil patterns 21a to 21d when transmitting a high-frequency signal.
  • the induced current is guided to the antenna pattern 35 as an induced current in the line length direction, and high frequency power is efficiently transmitted.
  • the line length directions of the coil patterns 21a to 21d and the antenna pattern 35 are not necessarily completely coincident with each other in the magnetic field coupling portion, and may be substantially coincident with each other. In other words, the line length directions of both need not be orthogonal.
  • the feeder circuit board 15 is disposed to face the corner portion on the inner side of the antenna pattern 35, as shown in FIG. 6B, the third direction which is the direction with respect to the first direction of the loop electrode 20 is provided.
  • the third region Z extending in the direction (see arrow z) also overlaps with the antenna pattern 35, and the third direction z and the line length direction of the antenna pattern 35 coincide.
  • the loop electrode 20 and the antenna pattern 35 are magnetically coupled in the two regions of the first region X and the third region Z, and the degree of coupling between the two is increased.
  • the feeder circuit board 15 has a substantially square shape in plan view, and the auxiliary electrode 26 has slits 26a formed at the center of four sides. If the feeder circuit board 15 has such a shape, when the feeder circuit board 15 is mounted on the antenna pattern 35, any of the four sides may be arranged along the antenna pattern 35. There is no question. On the other hand, when a plurality of slits 26 a are formed in the auxiliary electrode 26, if all the slits 26 a overlap the antenna pattern 35 in plan view, the induced current generated in the auxiliary electrode 26 circulates. In order to solve this problem, it is necessary that at least one slit 26 a does not overlap the antenna pattern 35.
  • the width W3 of the auxiliary electrode 26 is preferably larger than the predetermined width W1 of the loop electrode 20. However, if the width W3 is too large, the substrate 15 is increased in size, and if it is overlapped so as to close the inner peripheral edge of the loop electrode 20, the inductance values of the coil patterns 21a to 21d tend to decrease. Absent.
  • the sealing material 17 preferably contains a magnetic filler such as ferrite powder.
  • a magnetic filler such as ferrite powder.
  • the wireless communication module 5 can communicate with the reader / writer at a short distance without being combined with the antenna pattern 35.
  • the loop electrode 20 and the auxiliary electrode 26 function as a radiating element.
  • the wireless IC chip 10 for the power supply circuit board 15 adopts various mounting forms other than being housed in a cavity 16 provided on the surface of the board 15 and sealed with a sealing material 17. Can do.
  • various embodiments of the wireless communication module in which the wireless IC chip is mounted on the power supply circuit board will be described.
  • the wireless communication module 5A has a power supply circuit board 15 having a flat plate shape without a cavity, and the wireless IC chip 10 is mounted on a flat surface of the power supply circuit board 15. Although the height is increased by the thickness of the wireless IC chip 10, the step of forming a cavity in the substrate 15 can be omitted. In addition, there is an advantage that the number of turns of the loop electrode 20 is increased by forming a coil pattern in the portion where the cavity is formed.
  • a wireless communication module 5B according to the third embodiment shown in FIG. 9 has a cavity 16 formed on the back surface of the feeder circuit board 15 to accommodate the wireless IC chip 10 and sealed with a sealing material 17. Further, the auxiliary electrode 26 and the loop electrode 20 are electrically connected (DC connection) by an interlayer conductor 27. Note that sealing with the sealing material 17 is not always necessary. This is because the wireless IC chip 10 accommodated in the cavity 16 is protected by sticking the back surface of the power supply circuit board 15 to the base film 36.
  • the wireless communication module 5C according to the fourth embodiment shown in FIG. 10 is provided with the coil pattern 21e on the surface of the feeder circuit board 15 to form the loop electrode 20, and the auxiliary electrode 26 is formed on the back surface of the board 15.
  • the wireless IC chip 10 is mounted on the surface of the substrate 15.
  • a wireless communication module 5D according to the fifth embodiment shown in FIG. 11 has the feeder circuit board 15 provided with the auxiliary electrode 26 in two layers, and the auxiliary electrode 26 may be provided in two or more layers.
  • the auxiliary electrode 26 of each layer may be electrically independent or connected. When the auxiliary electrodes 26 of each layer are electrically connected, it is preferable that the directions of the currents flowing through the auxiliary electrodes 26 are the same.
  • the wireless communication module 5E according to the sixth embodiment shown in FIG. 12 is provided with the auxiliary electrode 26 on the feeder circuit board 15 so as to sandwich the loop electrode 20 in two layers.
  • the lower auxiliary electrode 26 has a function of suppressing the resonance frequency from being fluctuated by a metal body close to the lower side of the feeder circuit board 15.
  • the upper auxiliary electrode 26 has a function of suppressing the resonance frequency from being fluctuated by a metal body close to the upper side of the feeder circuit board 15.
  • FIGS. 6B and 6C various forms can be adopted as the mounting form of the feeder circuit board 15 with respect to the antenna pattern 35 other than the mounting on the corner portion of the antenna pattern 35.
  • the line length directions of the loop electrodes 20 (coil patterns 21a to 21d) and the antenna pattern 35 are not necessarily arranged so as to coincide with each other in the magnetic field coupling portion. As long as it flows.
  • one side of the auxiliary electrode 26 (the first region X of the loop electrode 20) is mounted so as to overlap the linear portion of the antenna pattern 35.
  • the power feeding circuit board 15 is displaced in the line length direction (see arrow a) of the antenna pattern 35, the frequency characteristics do not change.
  • the area of the portion where the loop electrode 20 (coil patterns 21a to 21d) is orthogonal to the line length direction of the antenna pattern 35 and overlaps the antenna pattern 35 is smaller.
  • a bent portion 35a is formed in the antenna pattern 35, and the three sides of the auxiliary electrode 26 (the loop electrode 20) are superimposed on the bent portion 35a.
  • the degree of coupling increases as the overlapping area between each of the auxiliary electrode 26 and the loop electrode 20 and the antenna pattern 35 increases.
  • the feeder circuit board 15 is arranged at the inner corner of the antenna pattern 35 as in FIGS. 6B and 6C, but the auxiliary electrode 26 has one slit. Only 26a is formed. The slit 26 a is arranged so as not to overlap the antenna pattern 35.
  • the wireless communication module 5F according to the seventh embodiment is formed such that the cavity portion 16 is formed in the feeder circuit board 15 so as to open on the back side of the substrate 15 and the cavity portion 16 is wirelessly connected.
  • the IC chip 10 is accommodated and the sealing material 17 is filled.
  • Other configurations are the same as those of the first embodiment.
  • the wireless communication module 5F is attached to the base substrate 36 with an insulating adhesive 19 with the opening of the cavity 16 facing the base substrate 36.
  • the wireless communication device 1A is arranged in FIG. 17A.
  • the effects of the wireless communication module 5F and the wireless communication device 1A are basically the same as those shown in FIG. 2, and in particular, the bottom surface of the cavity portion 16 (disposed on the top surface in FIG. 17A).
  • the wireless IC chip 10 is protected.
  • the bottom surface of the power supply circuit board 15 (which is the top surface in FIG. 10A) has high flatness, suction when the wireless communication module 5F is mounted on the base substrate 36 by vacuum suction using a mounter. Good performance.
  • FIG. 17A since the sealing material 17 slightly protrudes from the cavity portion 16, the protruding portion is not mounted when mounted on the base substrate 36 (when bonded with the adhesive 19). The anchor effect is exhibited, and the feeder circuit board 15 is firmly bonded onto the base substrate 36. In addition, even if the sealing material 17 has a concave shape on the contrary, the anchor effect is exhibited.
  • FIGS. 18 to 20 Next, a third example of a wireless communication device equipped with the wireless communication module 5 will be described.
  • the wireless communication device 1B is obtained by mounting the wireless communication module 5 on a flexible base substrate 36A having a circular shape, and on the front and back surfaces of the base substrate 36A, as shown in FIG.
  • An antenna pattern 35A as a second example shown in (B) is formed. Note that the antenna pattern 35A on the back surface side shown in FIG. 19B is seen through from the front surface side.
  • the antenna patterns 35A are wound in a circular shape, overlap each other in plan view over almost the entire length, and are capacitively coupled to each other.
  • the antenna pattern 35A forms the equivalent circuit shown in FIG.
  • Capacitance C3 is generated between the front and back patterns which are coupled by the capacitance C2.
  • the operation of the antenna pattern 35A capacitively coupled to each other is the same as that of the antenna pattern 35 shown in FIG. 2, and the current flows in the same direction.
  • the coiled electrode 20 of the wireless communication module 5 disposed on the surface of the base substrate 36A and partially overlapping the antenna pattern 35A is magnetically coupled to the antenna pattern 35A. Therefore, the reader / writer antenna and the wireless communication module 5 can communicate with each other via the antenna pattern 35A.
  • the basic operational effects of the wireless communication device 1B are as described in the wireless communication device 1.
  • both end portions of the antenna pattern 35A arranged on the front and back sides of the base substrate 36A may be DC coupled by crimping (pouching). May be combined. In short, it is only necessary that the directions of the currents flowing through the antenna patterns 35A on the front and back sides are the same.
  • FIG. 21 shows an antenna pattern 35B as a third example.
  • the antenna pattern 35B has a substantially circular shape having a rectangular portion 35B ′, is formed on the front and back surfaces of the base substrate 36A, and the antenna pattern on the back surface side is formed so as to overlap the antenna pattern 35B on the front surface side in plan view. Yes.
  • the antenna patterns 35B on the front and back surfaces are capacitively coupled to each other, and the equivalent circuit thereof is the same as in FIG.
  • the wireless communication module 5 is mounted along the inner peripheral portion of the rectangular portion 35B ′ on the surface side of the base substrate 36A, and the coiled electrode 20 built in the wireless communication module 5 is connected to the antenna pattern 35B and the magnetic field. Combine to form a wireless communication device.
  • the operational effects of the antenna pattern 35B are as described for the antenna pattern 35A.
  • the antenna pattern 35B is coupled to the coiled electrode 20 at three sides, and the amount of coupling between the antenna pattern 35B and the coiled electrode 20 is increased.
  • FIG. 22 shows an antenna pattern 35C as a fourth example.
  • the antenna pattern 35C has a substantially circular shape having a stepped portion 35C ′, is formed on the front and back surfaces of the base substrate 36A, and the antenna pattern on the back surface side is formed so as to overlap the antenna pattern 35C on the front surface side in plan view. ing.
  • the antenna patterns 35C on the front and back surfaces are capacitively coupled to each other, and an equivalent circuit thereof is the same as that in FIG.
  • the wireless communication module 5 is mounted on the surface side of the base substrate 36A along the inner peripheral portion of the stepped portion 35C ′, and the coiled electrode 20 is magnetically coupled to the antenna pattern 35C to constitute a wireless communication device. To do.
  • the operational effects of the antenna pattern 35C are as described for the antenna pattern 35A.
  • the antenna pattern 35C is coupled to the coiled electrode 20 at two sides, and the amount of coupling between the antenna pattern 35C and the coiled electrode 20 is increased.
  • FIG. 23 shows an antenna pattern 35D as a fifth example.
  • the antenna pattern 35D is basically arranged in the same shape as the antenna pattern 35A shown in FIG. 19, and the outermost turn portion 35D ′ is formed thicker than the other portions. Other configurations and operational effects are basically the same as described in the antenna pattern 35A.
  • the coupling capacitance value at the outermost turn portion 35D ′ increases, the resonance frequency of the antenna pattern 35D can be lowered.
  • the magnetic flux passage region can be increased without reducing the opening diameter. That is, in the antenna pattern 35D, the resonance frequency can be shifted to the lower side, and the communication distance can be maintained and improved without increasing the overall size.
  • FIG. 24 shows an antenna pattern 35E as a sixth example.
  • the antenna pattern 35E has the outermost turn portion 35E ′ thick as in the antenna pattern 35D shown in FIG. 25.
  • the antenna pattern 35E forms the equivalent circuit shown in FIG. 25, and the inductor L1 formed by the antenna pattern 35E on the front surface side and the inductor L2 formed by the antenna pattern 35E on the back surface side are magnetically coupled to each other.
  • one end 35E ′′ is coupled in a direct current manner, and the outermost turn portions 35E ′′ are coupled by a capacitor C2.
  • the operation of the antenna patterns 35E magnetically coupled to each other is the same as that of the antenna pattern 35A shown in FIG.
  • the coupling capacitance value at the outermost turn portion 35E ' is increased, so that the resonance frequency of the antenna pattern 35E can be lowered.
  • the magnetic flux passage area can be increased without reducing the opening diameter. That is, in the antenna pattern 35E, the resonance frequency can be shifted to the lower side, and the communication distance can be maintained and improved without increasing the overall size.
  • FIG. 26 As an example of a wireless communication terminal according to the present invention, an IC card 50 is shown in FIG.
  • the IC card 50 has the wireless communication device 1 incorporated therein.
  • the wireless communication module, the wireless communication device, and the wireless communication terminal according to the present invention are not limited to the above-described embodiments, and can be variously modified within the scope of the gist.
  • the auxiliary electrode is disposed so as to overlap substantially the entire area of the loop electrode, but the auxiliary electrode may be disposed at a position where the loop electrode overlaps with the antenna pattern.
  • the loop electrode has a predetermined width by winding the coil pattern a plurality of turns, but may be wound by one turn to have a predetermined width.
  • the coil pattern may be wound in a single layer without being wound in multiple layers.
  • the wireless IC may be formed integrally with the inside of the power supply circuit board other than the chip mounted on the power supply circuit board.
  • the wireless IC may be mounted as a chip on another substrate disposed in the vicinity of the power supply circuit substrate.
  • the wireless communication device can be mounted on various portable products.
  • the wireless IC chip and the loop electrode may not be DC-connected (directly connected), and may be coupled via an electromagnetic field. In other words, it only needs to be electrically connected.
  • the antenna pattern may have various shapes as long as it plays a role as an antenna. Further, the present invention is not limited to the HF band such as the 13.56 MHz band, and can be used for a UHF band or a SHF band wireless communication device.
  • the present invention is useful for a wireless communication module, a wireless communication device, and a wireless communication terminal, and is particularly excellent in that the positional accuracy of the feeder circuit board with respect to the antenna pattern is relaxed and the production efficiency is increased.

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Abstract

Pour obtenir un module de radiocommunication, un dispositif de radiocommunication et un terminal de radiocommunication dans lesquels la précision de la position d'une carte de circuit d'alimentation par rapport à un diagramme d'antenne peut être moins importante et dans lesquels il est possible d'améliorer le rendement de production, l'invention propose un dispositif de radiocommunication équipé d'une puce de circuit intégré (IC) radio (10) qui traite un signal radio, d'une carte de circuit d'alimentation (15) qui comporte une électrode en boucle (20) et une électrode auxiliaire (26) électriquement connectées à la puce IC radio (10), et d'un motif d'antenne (35) qui est électromagnétiquement couplé à l'électrode en boucle (20) et à l'électrode auxiliaire (26). L'électrode en boucle (20) comprend des motifs de bobines enroulés et est agencée de telle manière qu'au moins une partie de celle-ci soit superposée au motif d'antenne (35) dans une vue en plan. L'électrode auxiliaire (26) est agencée de telle manière qu'au moins une partie de celle-ci soit superposée à l'électrode en boucle (20) et au motif d'antenne (35) dans une vue en plan. Au moins une fente de division est formée dans l'électrode auxiliaire (26) et est positionnée de telle manière qu'au moins l'une desdites fentes ne soit pas superposée au motif d'antenne (35).
PCT/JP2011/052593 2010-03-03 2011-02-08 Module de radiocommunication, dispositif de radiocommunication et terminal de radiocommunication WO2011108339A1 (fr)

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JP5790907B1 (ja) * 2014-03-17 2015-10-07 株式会社村田製作所 アンテナ装置、無線通信端末
WO2016194495A1 (fr) * 2015-06-02 2016-12-08 凸版印刷株式会社 Support d'information de type sans contact
JP2016224815A (ja) * 2015-06-02 2016-12-28 凸版印刷株式会社 非接触型情報媒体
JP2017010154A (ja) * 2015-06-18 2017-01-12 凸版印刷株式会社 非接触型情報媒体
WO2017169709A1 (fr) * 2016-03-31 2017-10-05 株式会社村田製作所 Antenne bobine, dispositif de fourniture d'énergie, dispositif de réception d'énergie, et système d'alimentation électrique sans fil

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WO2015115402A1 (fr) * 2014-01-30 2015-08-06 株式会社村田製作所 Appareil de communication sans fil
JP5790904B1 (ja) * 2014-01-30 2015-10-07 株式会社村田製作所 無線通信装置
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WO2016194495A1 (fr) * 2015-06-02 2016-12-08 凸版印刷株式会社 Support d'information de type sans contact
JP2016224815A (ja) * 2015-06-02 2016-12-28 凸版印刷株式会社 非接触型情報媒体
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WO2017169709A1 (fr) * 2016-03-31 2017-10-05 株式会社村田製作所 Antenne bobine, dispositif de fourniture d'énergie, dispositif de réception d'énergie, et système d'alimentation électrique sans fil

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