WO2018030363A1 - Dispositif d'antenne et instrument électronique - Google Patents

Dispositif d'antenne et instrument électronique Download PDF

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Publication number
WO2018030363A1
WO2018030363A1 PCT/JP2017/028669 JP2017028669W WO2018030363A1 WO 2018030363 A1 WO2018030363 A1 WO 2018030363A1 JP 2017028669 W JP2017028669 W JP 2017028669W WO 2018030363 A1 WO2018030363 A1 WO 2018030363A1
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WIPO (PCT)
Prior art keywords
conductor
coil
planar
antenna
planar conductor
Prior art date
Application number
PCT/JP2017/028669
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English (en)
Japanese (ja)
Inventor
宏充 伊藤
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 CN201790000942.7U priority Critical patent/CN209045774U/zh
Publication of WO2018030363A1 publication Critical patent/WO2018030363A1/fr

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    • 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
    • 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
    • H01Q7/06—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 with core of ferromagnetic material

Definitions

  • the present invention relates to an antenna device, and more particularly to an antenna device including a coil antenna and a planar conductor, and an electronic device including the antenna device.
  • an antenna device having a structure capable of obtaining a predetermined communication distance even when a planar conductor (planar conductor) and a coil antenna are close to each other has been devised.
  • Patent Document 1 describes an antenna device in which a coil conductor is wound around a magnetic body having one surface and the other surface close to the planar conductor.
  • the antenna device is configured such that the coil conductor disposed in proximity to one surface of the magnetic body does not overlap the coil conductor disposed in proximity to the other surface of the magnetic body as viewed from the normal direction of the one surface or the other surface.
  • An apparatus is disclosed.
  • the winding axis of the coil antenna constituted by the coil conductor is inclined with respect to the main surface of the planar conductor, and an antenna device that secures a communicable distance in a predetermined direction is realized. Yes.
  • the inductance of the coil antenna is reduced, and the frequency characteristics of the coil antenna are fluctuated. As a result, the communication characteristics of the antenna device may be reduced.
  • An object of the present invention is to provide an antenna device that suppresses fluctuations in the frequency characteristics of a coil antenna and has good communication characteristics in a configuration including a coil antenna and a planar conductor. Another object is to provide an electronic device including the antenna device.
  • the antenna device of the present invention A first planar conductor having a main surface; A coil antenna including at least a first coil conductor and a second coil conductor, and being wound a plurality of times to form a coil opening; With The first coil conductor is continuous with the first planar conductor; The first coil conductor and the second coil conductor are different from each other in the position in the direction perpendicular to the main surface of the first planar conductor, The first coil conductor and the second coil conductor are arranged to face each other with the coil opening sandwiched in a first direction in a plan view of the first planar conductor, The area of the first planar conductor is larger than the area of the coil opening when the first planar conductor is viewed in plan.
  • the first planar conductor is opposite to the second coil conductor in the first direction with respect to the first coil conductor in a plan view of the first planar conductor. It is preferable to arrange
  • the first planar conductor has a length in the second direction orthogonal to the first direction in the plan view of the first planar conductor. It is preferably longer than the antenna. With this configuration, the magnetic flux collection effect by the first planar conductor is increased, and the substantial antenna area that functions as an antenna is further increased, so that the antenna characteristics are further improved.
  • the coil antenna includes a third coil conductor that is different from the first planar conductor in a position in a direction perpendicular to the main surface of the first planar conductor.
  • the first planar conductor does not overlap the entire coil opening in a plan view of the first planar conductor, and at least a part of the third coil conductor in the first direction is included in the first planar conductor. You may overlap with the part arrange
  • the generation of magnetic flux that attempts to pass through the gap between the third coil conductors in the direction perpendicular to the main surface of the first planar conductor is suppressed, and the coil opening is linked along the first planar conductor.
  • the density of magnetic flux is relatively increased. Therefore, the antenna characteristics of the antenna device are further enhanced.
  • a second planar conductor is provided, and the area of the second planar conductor is larger than the coil opening in plan view of the second planar conductor.
  • it may be arranged on the opposite side to the first coil conductor, and the second coil conductor may be continuous with the second planar conductor.
  • the length of the second planar conductor in the second direction orthogonal to the first direction is longer than that of the coil antenna in plan view of the second planar conductor. It is preferable. With this configuration, the magnetic flux collection effect by the second planar conductor is increased, and the substantial antenna area that functions as an antenna is further increased.
  • the coil antenna includes a fourth coil conductor whose position in a direction perpendicular to the main surface of the first planar conductor is different from that of the second planar conductor,
  • the second planar conductor does not overlap the entire coil opening in a plan view of the second planar conductor, and at least part of the second coil in the first direction is the fourth coil conductor.
  • the second planar conductor overlaps the entire fourth coil conductor in a plan view of the second planar conductor.
  • the second planar conductor may be bent or curved. With this configuration, an antenna device having desired directivity can be realized.
  • the first planar conductor is a conductor pattern formed on a circuit board provided in an electronic device to be assembled. With this configuration, it is not necessary to separately form the first planar conductor, so that the manufacture is easy and the cost can be reduced.
  • the second planar conductor is a conductor formed on a part of a housing provided in an electronic device to be assembled or on the inner surface of the housing. Preferably there is. With this configuration, it is not necessary to separately form the second planar conductor, so that the manufacturing is easy and the cost can be reduced.
  • the magnetic body 4 is disposed in the coil opening of the coil antenna.
  • a predetermined inductance value can be obtained without increasing the size of the coil antenna.
  • a coil antenna having a predetermined inductance can be realized with a small number of turns.
  • the electronic device of the present invention An antenna device; A feeding circuit; With The antenna device is A first planar conductor having a main surface; A coil antenna including at least a first coil conductor and a second coil conductor, and being wound a plurality of times to form a coil opening; Have The first coil conductor is continuous with the first planar conductor; The first coil conductor and the second coil conductor are different from each other in the position in the direction perpendicular to the main surface of the first planar conductor, The first coil conductor and the second coil conductor are disposed opposite to each other with the coil opening sandwiched with respect to a first direction in a plan view of the first planar conductor, The first planar conductor is larger than the area of the coil opening when the first planar conductor is viewed in plan, The feeding circuit is connected to the coil antenna.
  • the present invention in the configuration including the coil antenna and the planar conductor, it is possible to suppress the fluctuation of the frequency characteristics of the coil antenna and realize an antenna device having good communication characteristics.
  • an electronic device including the antenna device can be realized.
  • FIG. 1A is a plan view of the antenna device 101 according to the first embodiment
  • FIG. 1B is a cross-sectional view taken along the line AA in FIG.
  • FIG. 2 is a plan view showing the structure of the coil antenna included in the antenna device 101.
  • FIG. 3A is a plan view showing the main part of the electronic apparatus 202 according to the second embodiment
  • FIG. 3B is a cross-sectional view taken along the line BB in FIG.
  • FIG. 4 is a plan view of the circuit board 10 included in the electronic device 202.
  • FIG. 5 is a plan view of the main antenna unit 61 included in the electronic device 202.
  • FIG. 6 is a circuit diagram of the electronic device 202 according to the second embodiment.
  • FIG. 7A is a plan view showing a main part of an electronic apparatus 203A according to the third embodiment
  • FIG. 7B is a cross-sectional view taken along the line CC in FIG. 7A
  • FIG. 8 is a plan view showing a main part of another electronic device 203B according to the third embodiment.
  • 9 is a cross-sectional view taken along the line DD in FIG.
  • FIG. 10A is a plan view showing the main part of an electronic apparatus 204 according to the fourth embodiment
  • FIG. 10B is a cross-sectional view taken along line EE in FIG.
  • FIG. 11A is a plan view showing a main part of an electronic apparatus 205 according to the fifth embodiment
  • FIG. 11B is a cross-sectional view taken along line FF in FIG. 11A.
  • FIG. 12A is a plan view showing the main part of an electronic device 206 according to the sixth embodiment
  • FIG. 12B is a cross-sectional view taken along the line GG in FIG.
  • FIG. 13A is a plan view showing the main part of an electronic device 207 according to the seventh embodiment
  • FIG. 13B is a cross-sectional view taken along line HH in FIG.
  • FIG. 14 is a plan view of the circuit board 10 included in the electronic device 207 according to the seventh embodiment.
  • FIG. 15A is a plan view showing a main part of an electronic apparatus 208 according to the eighth embodiment
  • FIG. 15B is a cross-sectional view taken along the line II in FIG.
  • FIG. 16A is a plan view showing the main part of an electronic apparatus 209 according to the ninth embodiment
  • FIG. 16B is a JJ cross-sectional view in FIG.
  • FIG. 17A is a plan view showing the main part of the electronic apparatus 210 according to the tenth embodiment, and FIG. 17B is a cross-sectional view taken along the line KK in FIG.
  • FIG. 18A is a plan view showing the main part of an electronic apparatus 211 according to the eleventh embodiment, and FIG. 18B is a cross-sectional view taken along line LL in FIG.
  • FIG. 19A is a plan view showing the main part of an electronic apparatus 212 according to the twelfth embodiment, and FIG. 19B is a cross-sectional view taken along line MM in FIG. 19A.
  • FIG. 20A is a plan view showing the main part of an electronic device 213 according to the thirteenth embodiment
  • FIG. 20B is a cross-sectional view taken along line NN in FIG.
  • FIG. 21 is a plan view of the circuit board 10 included in the electronic device 213 according to the thirteenth embodiment.
  • the “coil antenna” is a kind of minute loop antenna and is an antenna that radiates magnetic flux.
  • the coil antenna is an antenna used for communication (near field communication) by magnetic field coupling with an antenna on the communication partner side, and is used for communication such as NFC (Near Field Communication), for example.
  • FIG. 1A is a plan view of the antenna device 101 according to the first embodiment
  • FIG. 1B is a cross-sectional view taken along the line AA in FIG.
  • FIG. 2 is a plan view showing the structure of the coil antenna included in the antenna device 101.
  • the magnetic body 4 is not shown.
  • the first coil conductor 31 is indicated by hatching
  • the second coil conductor 32 is indicated by a dot pattern. The same applies to the plan views shown below.
  • the antenna device 101 includes a base material 1, a routing conductor 41, a first planar conductor 21 having a main surface, a first coil conductor 31, a second coil conductor 32, other coil conductors 30A, 30B and 30C, a protective film 2, A magnetic body 4 is provided.
  • the substrate 1 is a resin sheet having flexibility and having a rectangular planar shape whose longitudinal direction matches the X-axis direction.
  • the substrate 1 has a first surface S1 and a second surface S2.
  • the substrate 1 is, for example, a thermoplastic resin sheet whose main material is a liquid crystal polymer.
  • the lead conductor 41 is formed on the first surface S1 of the base 1.
  • a first coil conductor 31, a second coil conductor 32, and other coil conductors 30A, 30B, and 30C are formed on the second surface S2 of the substrate 1.
  • the lead conductor 41 connects the other coil conductor 30 ⁇ / b> B and the other coil conductor 30 ⁇ / b> C via the interlayer connection conductor 7 formed on the base material 1.
  • the lead conductor 41, the first coil conductor 31, the second coil conductor 32, and the coil conductors 30A, 30B, and 30C are conductor patterns made of, for example, Cu foil.
  • the first planar conductor 21 is a conductor that is formed on the second surface S2 of the substrate 1 and has a rectangular planar shape whose longitudinal direction coincides with the X-axis direction. As shown in FIG. 2, the first coil conductor 31 is continuous with the first planar conductor 21.
  • the first planar conductor 21 is a conductor pattern made of Cu foil, for example.
  • the first coil conductor 31 and the second coil conductor 32 have a first direction (X-axis direction) in a plan view of the first planar conductor 21 (viewed from the Z-axis direction). Are opposed to each other with the coil opening interposed therebetween.
  • the coil antenna is a rectangular spiral conductor wound about 3 turns and having a coil opening, and has a first end E1 and a second end E2. The first end E1 and the second end E2 are connected to a power supply circuit (not shown).
  • the first coil conductor is continuous with the first planar conductor
  • the first coil conductor “continuous to the first planar conductor” refers to the shortest electrical path that functions as a part of the coil antenna.
  • the electrical path connecting the one end E0 of the other coil conductor 30A to the first end E1 of the coil antenna in the shortest is the first coil conductor that is “continuous with the first planar conductor”. (Refer to the first coil conductor 31 shown by hatching in FIG. 2).
  • the first coil conductor 31 according to the present embodiment is located in the ⁇ X direction most among the portions opposed to each other across the coil opening in the first direction (X axis direction) when viewed from the Z axis direction.
  • the second coil conductor 32 according to this embodiment is a portion that is located in the + X direction most among the portions that are opposed to each other across the coil opening in the first direction (X-axis direction) when viewed from the Z-axis direction. It is.
  • the protective film 2 is formed on the entire second surface S2 of the substrate 1, and covers the first planar conductor 21 and the formation surface of the coil antenna.
  • the protective film 2 is a resin film provided for the purpose of preventing oxidation of the conductor pattern formed on the surface of the base material 1, improving heat resistance, and preventing a short circuit between conductors due to metallic foreign matter, and is a coverlay film, for example. However, it may be a solder resist film or the like.
  • the magnetic body 4 is a resinous sheet having flexibility and having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction. As shown in FIG. 2, a through hole 5 is formed in the base material 1 and the protective film 2 in a portion inside the coil opening CP of the coil antenna, and the magnetic body 4 is inserted into the through hole 5.
  • the magnetic body 4 is, for example, a resin sheet containing ferrite powder in which magnetic ferrite powder is dispersed in a resin.
  • the first coil conductor 31 and the second coil conductor 32 are different in position (height) in the vertical direction (Z-axis direction) with respect to the main surface of the first planar conductor 21. Yes.
  • the area of the first planar conductor 21 is larger than the area of the coil opening CP when the first planar conductor 21 is viewed in plan (when viewed from the Z-axis direction), as shown in FIG. large.
  • the first planar conductor 21 has a length in the first direction (X-axis direction) longer than the coil opening CP when viewed from the Z-axis direction (LA1 ⁇ LA2).
  • the first planar conductor 21 is disposed on the opposite side of the first coil conductor 31 from the second coil conductor 32 (the ⁇ X direction side of the first coil conductor 31) when viewed from the Z-axis direction.
  • the antenna device 101 according to the present embodiment has the following effects.
  • the antenna device 101 includes the first planar conductor 21 larger than the area of the coil opening CP of the coil antenna when viewed from the Z-axis direction, and a part of the coil antenna (first coil conductor 31) is the first. It is continuous with the one-plane conductor 21. In other words, the first coil conductor 31 is a portion that is electrically continuous with the first planar conductor 21.
  • the substantial antenna area that functions as an antenna is increased, and magnetic flux is radiated and collected efficiently, so that it is easy to couple with the coil antenna on the communication partner side, and the antenna characteristics are improved.
  • the first planar conductor 21 is disposed on the opposite side of the first coil conductor 31 from the second coil conductor 32 in the X-axis direction when viewed from the Z-axis direction.
  • the coil conductor 31 and the second coil conductor 32 have different positions (heights) in the Z-axis direction. Therefore, the magnetic flux that attempts to pass through the first planar conductor 21 in the Z-axis direction is likely to be linked to the coil opening of the coil antenna along the first planar conductor 21 (magnetic flux ⁇ 2 in FIG. 1B). reference).
  • the magnetic body 4 is arrange
  • Second Embodiment An example of an electronic apparatus including the antenna device of the present invention is shown.
  • the “electronic device” in the present invention is a device including an antenna device, a power feeding circuit, and the like. , Game machines, toys and the like.
  • FIG. 3A is a plan view showing the main part of the electronic apparatus 202 according to the second embodiment
  • FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A
  • FIG. 4 is a plan view of the circuit board 10 included in the electronic device 202
  • FIG. 5 is a plan view of the main antenna unit 61 included in the electronic device 202.
  • the first coil conductor 31 is indicated by hatching
  • the second coil conductor 32 is indicated by a dot pattern.
  • illustration of the magnetic body 4 is omitted.
  • the electronic device 202 includes the circuit board 10, the RFIC 51, the reactance element 52, the main antenna unit 61, and the like.
  • the circuit board 10 is an insulative flat plate having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction, and has a first main surface VS1 and a second main surface VS2. Conductor patterns 42 and 43 are formed on the first main surface VS1 of the circuit board 10.
  • the RFIC 51 is mounted on the first main surface VS1 of the circuit board 10 and connected to one end of the conductor patterns 42 and 43, respectively.
  • the reactance element 52 is mounted on the first main surface VS1 of the circuit board 10 and connected to the conductor patterns 42 and 43, respectively.
  • the circuit board 10 is, for example, a printed wiring board.
  • the RFIC 51 is an RFIC element for RFID of 13.56 MHz, for example, and is an example of the “feed circuit” in the present invention.
  • the reactance element 52 is, for example, a chip capacitor.
  • the first planar conductor 21 and the first coil conductor 31 are formed inside the circuit board 10.
  • the first planar conductor 21 is a conductor pattern having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction.
  • the first coil conductor 31 is continuous with the first planar conductor 21.
  • the first coil conductor 31 is a portion that is electrically continuous with the first planar conductor 21.
  • the first planar conductor 21 is a ground conductor formed inside the circuit board, for example.
  • an electrical path that connects the connection point of the interlayer connection conductor (not shown) connected to the connection pin 6 to the connection point of the interlayer connection conductor 8 connected to the conductor pattern 43 in the shortest is “first”.
  • the first coil conductor is continuous with the single planar conductor (see the first coil conductor 31 indicated by hatching in FIG. 4).
  • the main antenna unit 61 includes a base material 1A, a second coil conductor 32, a plurality of third coil conductors 33A, 33B, 33C, 33D, a protective film 2A, a routing conductor 41, an interlayer connection conductor 7, and a magnetic body 4.
  • the main antenna unit 61 is attached to the inner surface of a housing (not shown) included in the electronic device 202, for example.
  • the base material 1A is a resin sheet having flexibility and having a rectangular planar shape whose longitudinal direction matches the Y-axis direction.
  • the base material 1A has a first surface S1 and a second surface S2.
  • a lead conductor 41 is formed on the first surface S1 of the base 1A.
  • the second coil conductor 32 and a plurality of third coil conductors 33A, 33B, 33C, and 33D are formed on the second surface S2 of the base 1A.
  • the routing conductor 41 connects the third coil conductor 33 ⁇ / b> C and the third coil conductor 33 ⁇ / b> D via the interlayer connection conductor 7.
  • the protective film 2A is formed on the entire second surface S2 of the substrate 1A and covers the formation surfaces of the second coil conductor 32 and the third coil conductors 33B and 33C.
  • the protective film 2A has openings corresponding to the positions of the third coil conductors 33A and 33D. Therefore, the third coil conductors 33A and 33D are exposed on the second surface S2 of the base 1A.
  • the third coil conductor 33 ⁇ / b> A is connected to one end of the first coil conductor 31 (see FIG. 4) formed inside the circuit board 10 through the connection pin 6.
  • the third coil conductor 33 ⁇ / b> D is connected to the other end of the conductor pattern 42 formed on the first main surface VS ⁇ b> 1 of the circuit board 10 via the connection pin 6.
  • the other end of the conductor pattern 43 formed on the first main surface VS1 of the circuit board 10 is connected to the first coil conductor 31 formed inside the circuit board 10 via the interlayer connection conductor 8 formed on the circuit board 10. It is connected to the other end (see FIG. 4).
  • the connection pin 6 is, for example, a movable probe pin.
  • the first coil conductor 31, the second coil conductor 32, the plurality of third coil conductors 33A, 33B, 33C, and 33D, the routing conductor 41, the interlayer connection conductor 7, and the connection pin 6 constitute a coil antenna.
  • the coil antenna according to the present embodiment is a rectangular spiral conductor wound about three turns and having a coil opening, and has a first end (the other end of the first coil conductor 31) and a second end (the third end). A coil conductor 33D).
  • the first end and the second end of the coil antenna are connected to the RFIC 51 via conductor patterns 42, 43 and the like.
  • the antenna device includes the first planar conductor 21, the first coil conductor 31, the second coil conductor 32, the third coil conductors 33A, 33B, 33C, and 33D, the connection pin 6, and the interlayer connection conductor 7. , 8 etc.
  • the magnetic body 4 is a resinous sheet having flexibility and having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction. As shown in FIG. 5, the base 1 ⁇ / b> A and the protective film 2 ⁇ / b> A are formed with through holes 5 in portions inside the coil openings formed by the second coil conductor 32 and the third coil conductors 33 ⁇ / b> A, 33 ⁇ / b> B, 33 ⁇ / b> C. The magnetic body 4 is inserted into the through hole 5.
  • the first coil conductor 31 and the second coil conductor 32 have different positions (heights) in the Z-axis direction.
  • the first planar conductor 21 according to the present embodiment has a second direction (Y that is orthogonal to the first direction (X-axis direction) when viewed from the Z-axis direction.
  • the length in the axial direction is longer than that of the coil antenna (LB1 ⁇ LB2).
  • FIG. 6 is a circuit diagram of the electronic device 202 according to the second embodiment.
  • the coil antenna is represented by L3
  • the reactance element 52 is represented by C.
  • the coil antenna L3 is connected to the RFIC 51, and the reactance element C is connected in parallel to the coil antenna L3.
  • An LC resonance circuit is configured by the coil antenna L3, the reactance element C, and the capacitive component of the RFIC 51 itself.
  • the capacitance of the reactance element C is selected so that the resonance frequency of the LC resonance circuit is substantially equal to the communication frequency of the RFID system (for example, 13.56 MHz).
  • the electronic device 202 according to the present embodiment has the following effects in addition to the effects described in the first embodiment.
  • the first planar conductor 21 is a conductor pattern formed on the circuit board 10 provided in the electronic device, it is not necessary to form the first planar conductor 21 separately, and the manufacturing is easy and the cost is reduced. Can be planned.
  • the first planar conductor 21 is formed inside the circuit board 10 in the present embodiment.
  • the first planar conductor 21 is formed on the first main surface VS1 of the circuit board 10.
  • it may be formed on the second main surface VS2.
  • the third embodiment shows an example in which the shape of the first planar conductor is different from that of the second embodiment.
  • FIG. 7A is a plan view showing the main part of an electronic apparatus 203A according to the third embodiment
  • FIG. 7B is a cross-sectional view taken along the line CC in FIG. 7A.
  • illustration of the magnetic body 4 is omitted.
  • the electronic device 203A is different from the electronic device 202 according to the second embodiment in the configuration of the first planar conductor. Other configurations are substantially the same as those of the electronic device 202.
  • the electronic device 203A includes the circuit board 10, the RFIC 51, the reactance element 52, the main antenna unit 61, and the like. Inside the circuit board 10, a first planar conductor 21A and a first coil conductor 31 are formed.
  • the first planar conductor 21A according to the present embodiment is longer in the first direction (X-axis direction) than the first planar conductor 21 shown in the second embodiment. As shown in FIGS. 7A and 7B, the third coil conductors 33A, 33B, 33C, 33D are different from the first planar conductor 21 in the position (height) in the Z-axis direction. . Further, the first planar conductor 21A has a first coil conductor 31 and a coil opening CP in the first direction (X-axis direction) among the third coil conductors 33A, 33B, 33C, and 33D as viewed from the Z-axis direction. It overlaps with a portion (a part of the third coil conductor 33C) disposed between the two. On the other hand, the first planar conductor 21A does not overlap the entire coil opening CP as viewed from the Z-axis direction.
  • the electronic device 203A according to the present embodiment has the following effects in addition to the effects described in the second embodiment.
  • the first planar conductor 21A does not overlap the entire coil opening CP as viewed from the Z-axis direction, and at least a part of the third coil conductors 33A, 33B, 33C, 33D In the first direction (X-axis direction), it overlaps with a portion (a part of the third coil conductor 33C) disposed between the first coil conductor 31 and the coil opening CP.
  • the magnetic flux that attempts to pass through the first planar conductor 21A from the ⁇ Z direction to the + Z direction is likely to interlink with the coil opening along the first planar conductor 21A (in FIG. 7B). (Refer to magnetic flux ⁇ 3). Therefore, an antenna device having directivity in a direction different from that of the antenna device described above can be realized.
  • FIG. 8 is a plan view showing a main part of another electronic device 203B according to the third embodiment.
  • 9 is a cross-sectional view taken along the line DD in FIG. In FIG. 8, illustration of the magnetic body 4 is omitted.
  • the electronic device 203B is different from the electronic device 202 according to the second embodiment in the configuration of the circuit board and the first planar conductor. Other configurations are substantially the same as those of the electronic device 202.
  • the electronic device 203B includes a circuit board 10A, an RFIC 51, a reactance element 52, a main antenna unit 61, and the like.
  • a first planar conductor 21B and a first coil conductor 31 are formed inside the circuit board 10A.
  • the first planar conductor 21B is an L-shaped conductor pattern.
  • the first planar conductor 21B is disposed adjacent to both the first direction ( ⁇ X direction of the coil antenna) and the second direction (+ Y direction of the coil antenna) of the coil antenna as viewed from the Z-axis direction. .
  • the magnetic flux collection effect by the first planar conductor 21B is further increased, and the substantial antenna area that functions as an antenna is further increased. Therefore, the antenna characteristics of the antenna device are further enhanced.
  • FIG. 10A is a plan view showing the main part of an electronic apparatus 204 according to the fourth embodiment
  • FIG. 10B is a cross-sectional view taken along line EE in FIG.
  • the electronic device 204 is different from the electronic device 203A according to the third embodiment in that the main antenna unit 61 does not include the through hole 5 and the magnetic body 4. Other configurations are substantially the same as those of the electronic device 203A.
  • the 2nd coil conductor shows the structural example which is a conductor pattern formed in the inner surface of a housing
  • FIG. 11A is a plan view showing a main part of an electronic apparatus 205 according to the fifth embodiment
  • FIG. 11B is a cross-sectional view taken along line FF in FIG. 11A.
  • the resin casing 71 is not shown.
  • the electronic device 205 includes a resin casing 71, a circuit board 10, an RFIC 51, a reactance element 52, and the like.
  • the circuit board 10, the RFIC 51, the reactance element 52, and the like are accommodated in the resin casing 71.
  • the circuit board 10 is an insulative flat plate having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction, and has a first main surface VS1 and a second main surface VS2.
  • Conductor patterns 42 and 43 are formed on the first main surface VS1 of the circuit board 10.
  • the RFIC 51 is mounted on the first main surface VS1 of the circuit board 10 and connected to one end of the conductor patterns 42 and 43, respectively.
  • the reactance element 52 is mounted on the first main surface VS1 of the circuit board 10 and connected to the conductor patterns 42 and 43, respectively.
  • the first planar conductor 21 is a conductor pattern having a rectangular planar shape whose longitudinal direction coincides with the X-axis direction. As shown in FIG. 11A, the first coil conductor 31 is continuous with the first planar conductor 21.
  • the electrical path connecting the shortest distance from one end E0 of the other coil conductor 30A to the connection point of the interlayer connection conductor 8 connected to the conductor pattern 43 is “continuous with the first planar conductor”.
  • the first coil conductor see the first coil conductor 31 shown by hatching in FIG. 11A).
  • the other coil conductor 33 and the second coil conductor 32 are formed on the inner surface of the resin casing 71.
  • the other coil conductor 33 and the second coil conductor 32 are conductor patterns extending in the second direction (Y-axis direction).
  • One end of the other coil conductor 33 and one end of the second coil conductor 32 are connected to the other ends of the fourth coil conductors 34 ⁇ / b> A and 34 ⁇ / b> B formed inside the circuit board 10 via the connection pins 6.
  • the other end of the other coil conductor 33 and the other end of the second coil conductor 32 are connected to one end of fourth coil conductors 34 ⁇ / b> B and 34 ⁇ / b> C formed inside the circuit board 10 via the connection pin 6.
  • the other end of the other coil conductor 30 ⁇ / b> C is connected to the other end of the conductor pattern 42 via an interlayer connection conductor 8 formed on the circuit board 10.
  • the other end of the first coil conductor 31 is connected to the other end of the conductor pattern 43 formed on the first main surface VS1 of the circuit board 10 via the interlayer connection conductor 8 formed on the circuit board 10.
  • the first coil conductor 31, the second coil conductor 32, the fourth coil conductors 34A, 34B, 34C, 33, the routing conductor 41, and the interlayer connection conductor 7 constitute a coil antenna.
  • the coil antenna according to the present embodiment is a rectangular spiral conductor that is wound about three turns and has a coil opening, and has a first end (the other end of the first coil conductor 31) and a second end (the fourth end). The other end of the coil conductor 34C).
  • the first end and the second end of the coil antenna are connected to the RFIC 51 via conductor patterns 42, 43 and the like.
  • the antenna device includes the first planar conductor 21, the first coil conductor 31, the second coil conductor 32, the fourth coil conductors 34 ⁇ / b> A, 34 ⁇ / b> B, 34 ⁇ / b> C, 33, and the connection pins 6.
  • the first coil conductor 31 and the second coil conductor 32 are opposed to each other across the coil opening in the first direction (X-axis direction) when viewed from the Z-axis direction. Further, as shown in FIG. 11B, the first coil conductor 31 and the second coil conductor 32 are different from each other in position (height) in the Z-axis direction.
  • the basic configuration of the antenna device according to the present embodiment is the same as that of the antenna device 101 according to the first embodiment, and the same operations and effects as the antenna device 101 are achieved.
  • FIG. 12A is a plan view showing the main part of the electronic device 206 according to the sixth embodiment
  • FIG. 12B is a cross-sectional view taken along the line GG in FIG. In FIG. 12A, the resin casing 71 is not shown.
  • the electronic device 206 is different from the electronic device 205 according to the fifth embodiment in that the electronic device 206 includes the second planar conductor 22 having a main surface. Other configurations are substantially the same as those of the electronic device 205.
  • the electronic device 206 includes a resin casing 71, a second planar conductor 22, a circuit board 10, an RFIC 51, a reactance element 52, and the like.
  • the second planar conductor 22 according to the present embodiment is a part of a housing included in the electronic device 206.
  • the second planar conductor 22 is a conductor having a rectangular planar shape whose longitudinal direction coincides with the Y-axis direction. As shown in FIG. 12A, the second coil conductor 32 is continuous with the second planar conductor 22. In other words, the second coil conductor 32 is a portion that is electrically continuous with the second planar conductor 22.
  • the second coil conductor is continuous with the second planar conductor
  • the second coil conductor 32 and the second planar conductor 22 are structurally connected (integrated).
  • the second coil conductor “continuous to the second planar conductor” refers to the shortest electrical path that functions as a part of the coil antenna.
  • the electrical path connecting the two connection points of the second planar conductor 22 and the connection pin 6 in the shortest is the second coil conductor that is “continuous with the second planar conductor”. (See the second coil conductor 32 shown by the dot pattern in FIG. 12A).
  • the second planar conductor 22 is disposed on the opposite side of the second coil conductor 32 from the first coil conductor 31 (the + X direction side of the second coil conductor 32) when viewed from the Z-axis direction. As shown in FIG. 12A, the area of the second planar conductor 22 is larger than the area of the coil opening CP of the coil antenna when viewed from the Z-axis direction. Furthermore, the length of the second planar conductor 22 in the first direction (X-axis direction) is longer than the coil opening CP when viewed from the Z-axis direction (LC1 ⁇ LC2).
  • the second planar conductor 22 has a length in a second direction (Y-axis direction) orthogonal to the first direction (X-axis direction) when viewed from the Z-axis direction. Is longer than the coil antenna (LD1 ⁇ LD2).
  • the electronic device 206 according to the present embodiment has the following effects.
  • the second planar conductor 22 having a larger area than the coil opening CP of the coil antenna when viewed from the Z-axis direction is provided, and a part of the coil antenna (second coil conductor 32) is the first. It is continuous with the two-plane conductor 22. In other words, the second coil conductor 32 is a portion that is electrically continuous with the second planar conductor 22.
  • the magnetic flux that attempts to pass through the second planar conductor 22 in the Z-axis direction is likely to be linked to the coil opening along the second planar conductor 22 (magnetic flux ⁇ 5 in FIG. 12B). (See ⁇ 6). Therefore, both the radiation efficiency of the magnetic flux and the magnetic flux collection effect are enhanced, and it becomes easy to couple with the coil antenna on the communication partner side.
  • the second planar conductor 22 is a part of the housing of the electronic device, it is not necessary to form the second planar conductor 22 separately, and manufacturing is easy and cost reduction can be achieved.
  • the second planar conductor 22 Since the second planar conductor 22 has a length in the second direction (Y-axis direction) orthogonal to the first direction (X-axis direction) as viewed from the Z-axis direction, it is longer than the coil antenna. The magnetic flux collection effect by the second planar conductor 22 is increased, and the substantial antenna area that functions as an antenna is further increased.
  • the second planar conductor 22 may be a conductor formed on the inner surface or the surface of the casing. Good.
  • FIG. 13A is a plan view showing a main part of an electronic device 207 according to the seventh embodiment
  • FIG. 13B is a cross-sectional view taken along line HH in FIG.
  • FIG. 14 is a plan view of the circuit board 10 included in the electronic device 207 according to the seventh embodiment.
  • the resin casing 71 is not shown.
  • the electronic device 207 is different from the electronic device 206 according to the sixth embodiment in that there is one second coil conductor 32. Other configurations are substantially the same as those of the electronic device 206.
  • the electronic device 207 includes a resin casing 71, a second planar conductor 22, a circuit board 10, an RFIC 51, a reactance element 52, and the like. Inside the circuit board 10, a first planar conductor 21, a first coil conductor 31, and a plurality of fourth coil conductors 34A and 34B are formed.
  • the second planar conductor 22 is the same as the second planar conductor shown in the sixth embodiment. As shown in FIG. 13A, the second coil conductor 32 is continuous with the second planar conductor 22. In other words, the second coil conductor 32 is a portion that is electrically continuous with the second planar conductor 22.
  • One end of the second coil conductor 32 is connected to the other end of the fourth coil conductor 34 ⁇ / b> A formed inside the circuit board 10 through the connection pin 6.
  • the other end of the second coil conductor 32 is connected to one end of a fourth coil conductor 34 ⁇ / b> B formed inside the circuit board 10 via the connection pin 6.
  • the other end of the fourth coil conductor 34 ⁇ / b> B is connected to the other end of the conductor pattern 42 via an interlayer connection conductor 8 formed on the circuit board 10.
  • the other end of the first coil conductor 31 is connected to the other end of the conductor pattern 43 via an interlayer connection conductor 8 formed on the circuit board 10.
  • the first coil conductor 31, the second coil conductor 32, the plurality of fourth coil conductors 34A and 34B, the interlayer connection conductor 8, and the connection pin 6 constitute a coil antenna.
  • the coil antenna according to the present embodiment is a rectangular spiral conductor that is wound about three turns and has a coil opening, and has a first end (the other end of the first coil conductor 31) and a second end (the fourth end). The other end of the coil conductor 34B).
  • the first end and the second end of the coil antenna are connected to the RFIC 51 via conductor patterns 42, 43 and the like.
  • the antenna device includes the first planar conductor 21, the first coil conductor 31, the second coil conductor 32, the second planar conductor 22, the plurality of fourth coil conductors 34 ⁇ / b> A and 34 ⁇ / b> B, and the connection pins 6. Etc.
  • the antenna device there is one second coil conductor 32.
  • the magnetic flux that attempts to pass in the X-axis direction along the first planar conductor 21 does not interlink with the coil opening CP viewed from the Z-axis direction, a part of the coil antenna ( Since it is interlinked with the second coil conductor 32), the coupling with the coil antenna on the communication partner side can be ensured (see magnetic flux ⁇ 7 in FIG. 13B).
  • the eighth embodiment shows an example in which the shape of the second planar conductor is different from that of the seventh embodiment.
  • FIG. 15A is a plan view showing the main part of the electronic apparatus 208 according to the eighth embodiment
  • FIG. 15B is a cross-sectional view taken along the line II in FIG. 15A.
  • the resin casing 71 is not shown.
  • the electronic device 208 is different from the electronic device 207 according to the seventh embodiment in the configuration of the second planar conductor. Other configurations are substantially the same as those of the electronic device 207.
  • the electronic device 208 includes a resin casing 71, the second planar conductor 22A, the circuit board 10, the RFIC 51, the reactance element 52, and the like.
  • the second planar conductor 22A according to this embodiment is longer in the first direction (X-axis direction) than the second planar conductor 22 shown in the seventh embodiment. As shown in FIGS. 15A and 15B, the second planar conductor 22A is different from the fourth coil conductors 34A, 34B in the position (height) in the Z-axis direction.
  • the second planar conductor 22A is the first of the fourth coil conductors 34A and 34B in a plan view of the second planar conductor 22A (viewed from the Z-axis direction). It overlaps with a portion (a part of the fourth coil conductor 34B) disposed between the second coil conductor 32 and the coil opening CP in one direction (X-axis direction). On the other hand, the second planar conductor 22A does not overlap the entire coil opening CP viewed from the Z-axis direction.
  • the electronic device 208 according to the present embodiment has the following effects in addition to the effects described in the seventh embodiment.
  • the second planar conductor 22A does not overlap the entire coil opening CP as viewed from the Z-axis direction, and at least a part of the fourth coil conductors 34A and 34B is in the first direction. It overlaps with a portion (a part of the fourth coil conductor 34B) disposed between the second coil conductor 32 and the coil opening CP in the (X-axis direction).
  • the gap between the fourth coil conductors 34B disposed between the second coil conductor 32 and the coil opening CP in the first direction (X-axis direction) is perpendicular to the main surface of the second planar conductor 22A. Generation of magnetic flux (see magnetic flux ⁇ 9 in FIG.
  • the ninth embodiment shows an example in which the shape of the second planar conductor is different from that of the eighth embodiment.
  • FIG. 16A is a plan view showing the main part of an electronic device 209 according to the ninth embodiment, and FIG. 16B is a JJ cross-sectional view in FIG. In FIG. 16A, the resin casing 71 is not shown.
  • the electronic device 209 is different from the electronic device 208 according to the eighth embodiment in the shape of the second planar conductor. Other configurations are the same as those of the electronic device 208.
  • the electronic device 209 includes a resin casing 71, a second planar conductor 22B, a circuit board 10, an RFIC 51, a reactance element 52, and the like.
  • the second planar conductor 22B has a configuration in which a portion extending in the XY plane and a portion extending in the YZ plane are connected to each other by bending or bending.
  • the second planar conductor 22B is disposed between the second coil conductor 32 and the coil opening CP in the first direction (X-axis direction) of the fourth coil conductors 34A and 34B when viewed from the Z-axis direction. It overlaps with the part (a part of the fourth coil conductor 34B).
  • the second planar conductor 22B does not overlap the entire coil opening CP as viewed from the Z-axis direction.
  • an antenna device having desired directivity can be realized by bending or bending the second planar conductor.
  • the tenth embodiment shows an example in which the shape of the second planar conductor is different from that of the ninth embodiment.
  • FIG. 17A is a plan view showing the main part of the electronic apparatus 210 according to the tenth embodiment
  • FIG. 17B is a cross-sectional view taken along the line KK in FIG. In FIG. 17A, the resin casing 71 is not shown.
  • the electronic device 210 is different from the electronic device 209 according to the ninth embodiment in the shape of the second planar conductor. Other configurations are the same as those of the electronic device 209.
  • the electronic device 210 includes a resin casing 71, a second planar conductor 22C, a circuit board 10, an RFIC 51, a reactance element 52, and the like.
  • the second planar conductor 22C is a C-shaped (U-shaped) conductor as viewed from the Z-axis direction. Further, the second planar conductor 22C is bent or curved, and has a configuration in which a portion extending in the XY plane and a portion extending in the YZ plane are connected. Further, the second planar conductor 22C overlaps the fourth coil conductors 34A and 34B as viewed from the Z-axis direction. On the other hand, the second planar conductor 22C does not overlap the entire coil opening CP as viewed from the Z-axis direction.
  • the electronic device 210 according to the present embodiment has the following effects.
  • the second planar conductor 22C overlaps the entire fourth coil conductors 34A and 34B when viewed from the Z-axis direction.
  • generation of magnetic flux that attempts to pass through the gap between the fourth coil conductor 34A and the fourth coil conductor 34B or the gap between the fourth coil conductors 34B is further suppressed, and along the second planar conductor 22C.
  • the density of magnetic flux interlinking with the coil opening is relatively increased. Therefore, when viewed from the Z-axis direction, the antenna characteristics of the antenna device are further enhanced as compared with the case where the second planar conductor overlaps only part of the fourth coil conductor.
  • FIG. 18A is a plan view showing the main part of the electronic apparatus 211 according to the eleventh embodiment
  • FIG. 18B is a cross-sectional view taken along the line LL in FIG. In FIG. 18A, the resin casing 71 is not shown.
  • the electronic device 211 is different from the electronic device 208 according to the eighth embodiment in that it includes the auxiliary coil antenna 81.
  • Other configurations are substantially the same as those of the electronic device 208.
  • the electronic device 211 includes a resin casing 71, the second planar conductor 22A, the circuit board 10, the RFIC 51, the reactance element 52, the auxiliary coil antenna 81, and the like.
  • the auxiliary coil antenna 81 is, for example, a multilayer chip antenna.
  • the antenna device includes a first planar conductor 21, a first coil conductor 31, a second coil conductor 32, a second planar conductor 22A, a plurality of fourth coil conductors 34A and 34B, a connection pin 6, and an auxiliary device.
  • the coil antenna 81 is used.
  • Conductor patterns 42A, 42B, and 43 are formed on the first main surface VS1 of the circuit board 10.
  • the RFIC 51 is mounted on the first main surface VS1 of the circuit board 10 and connected to one ends of the conductor patterns 42A and 43, respectively.
  • the reactance element 52 is mounted on the first main surface VS1 of the circuit board 10 and connected to the conductor patterns 42A and 43, respectively.
  • the auxiliary coil antenna 81 is mounted on the first main surface VS1 of the circuit board 10 so that the winding axis coincides with the X-axis direction, and is connected to the other end of the conductor pattern 42A and one end of the conductor pattern 42B.
  • the other end of the conductor pattern 42B is connected to the second end (the other end of the fourth coil conductor 34C) of the coil antenna according to this embodiment. That is, the auxiliary coil antenna 81 is connected in series between the RFIC 51 and the coil antenna.
  • auxiliary coil antenna 81 since the auxiliary coil antenna 81 is provided, an antenna device having desired directivity can be easily realized. Note that the arrangement of the auxiliary coil antenna 81 and the direction of the winding axis can be appropriately changed within the scope of the effects and advantages of the present invention. Further, the number of auxiliary coil antennas is not limited to one and may be plural.
  • FIG. 19A is a plan view showing the main part of an electronic device 212 according to the twelfth embodiment
  • FIG. 19B is a cross-sectional view taken along line MM in FIG. 19A.
  • the resin casing 71 is not shown.
  • the electronic device 212 is different from the electronic device 209 according to the ninth embodiment in that it includes a power supply coil 82.
  • Other configurations are substantially the same as those of the electronic device 209.
  • the electronic device 212 includes a resin casing 71, a second planar conductor 22A, a circuit board 10, an RFIC 51, a reactance element 52, a feeding coil 82, and the like.
  • the power supply coil 82 is, for example, a multilayer chip coil.
  • the antenna device includes a first planar conductor 21, a first coil conductor 31, a second coil conductor 32, a second planar conductor 22A, a plurality of fourth coil conductors 34A and 34B, and a connection pin 6. Is done.
  • Conductor patterns 44, 45, and 46 are formed on the first main surface VS1 of the circuit board 10.
  • the reactance element 53 is mounted on the first main surface VS1 of the circuit board 10.
  • the first end (the other end of the first coil conductor 31) and the second end (the other end of the fourth coil conductor 34B) of the coil antenna according to the present embodiment are arranged on the conductor pattern 44. And are connected to each other through the reactance element 53 and the like.
  • an LC resonance circuit is configured by the coil antenna and the capacitive component of the reactance element 53.
  • the RFIC 51 is mounted on the first main surface VS1 of the circuit board 10 and connected to one end of the conductor patterns 45 and 46, respectively.
  • the reactance element 52 is mounted on the first main surface VS1 of the circuit board 10 and connected to the conductor patterns 45 and 46, respectively.
  • the feeding coil 82 is mounted on the first main surface VS1 of the circuit board 10 and connected to the other ends of the conductor patterns 45 and 46, respectively. In this embodiment, it arrange
  • This configuration makes it possible to connect the coil antenna and the feeding circuit (RFIC 51) regardless of the balance / unbalance.
  • the configuration in which the feeding coil 82 is magnetically coupled to the coil antenna according to the present embodiment has been described.
  • the power supply coil 82 may not only be magnetically coupled to the coil antenna, but may also be configured to contribute to coupling with the coil antenna on the communication partner side, like the auxiliary coil antenna 81 shown in the eleventh embodiment. That is, the antenna device may be configured including the power supply coil 82 according to the present embodiment.
  • the feeding coil 82 does not contribute to the coupling with the coil antenna on the communication partner side, that is, when the feeding coil 82 is coupled only with the coil antenna like a transformer, design such as impedance matching is easy.
  • Impedance conversion can be performed by adjusting the winding ratio and effective magnetic permeability of the coupling portion between the feeding coil 82 and the coil antenna, thereby achieving impedance matching.
  • by suppressing the winding ratio and effective permeability so as to reduce the inductance of the coupling portion between the feeding coil 82 and the coil antenna the reduction in the coupling coefficient between the coil antenna and the coil antenna on the communication partner side is suppressed. You can also.
  • FIG. 20A is a plan view showing the main part of an electronic device 213 according to the thirteenth embodiment
  • FIG. 20B is an NN cross-sectional view in FIG.
  • FIG. 21 is a plan view of the circuit board 10 included in the electronic device 213 according to the thirteenth embodiment.
  • the resin casing 71 is not shown.
  • the electronic device 213 is different from the electronic device 212 according to the twelfth embodiment in that it includes a feeding coil 83.
  • Other configurations are substantially the same as those of the electronic device 212.
  • the electronic device 213 includes a resin casing 71, a second planar conductor 22A, a circuit board 10, an RFIC 51, a reactance element 52, a feeding coil 83, and the like.
  • Conductor patterns 47A and 47B are further formed on the first main surface VS1 of the circuit board 10, and a first coil conductor 31 and fourth coil conductors 34A, 34B and 34C are formed inside the circuit board 10. .
  • the conductor pattern 47A is connected to one end of the fourth coil conductor 34B, and the conductor pattern 47B is connected to one end of the fourth coil conductor 34C.
  • the power supply coil 83 has a coupling conductor 48.
  • the coupling conductor 48 is a conductor disposed near the mounting surface inside the power supply coil 83.
  • the coupling conductor 48 is connected to the conductor patterns 47A and 47B, respectively.
  • the first coil conductor 31, the second coil conductor 32, the plurality of fourth coil conductors 34A, 34B, 34C, the coupling conductor 48, the connection pin 6, and the like constitute a coil antenna. That is, in this embodiment, a part of the coil antenna (coupling conductor 48) is formed inside the feeding coil 83.
  • the antenna device includes a first planar conductor 21, a first coil conductor 31, a second coil conductor 32, a second planar conductor 22A, a plurality of fourth coil conductors 34A, 34B, and 34C, and a feeding coil 83. (Including the coupling conductor 48) and the connection pin 6.
  • the example of the antenna apparatus provided with one 1st coil conductor 31 and one 2nd coil conductor 32 was shown, it is not limited to this structure.
  • the number of the first coil conductors 31 and the second coil conductors 32 may be plural.
  • the present invention is not limited to this configuration.
  • the outer shape of the coil antenna can be changed as appropriate within the range where the functions and effects of the present invention are exhibited.
  • the outer shape of the coil antenna may be circular, elliptical, polygonal or the like.
  • the number of turns of the coil antenna can be changed as appropriate.

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Abstract

La présente invention concerne un dispositif d'antenne (101) comprenant un premier conducteur plan (21) ayant une surface principale, et une antenne à bobine. L'antenne à bobine est enroulée plusieurs fois pour former une ouverture de bobine, et comprend un premier conducteur de bobine (31) et un second conducteur de bobine (32) ayant différentes positions dans la direction verticale (direction de l'axe Z) par rapport à la surface principale du premier conducteur plan (21). Le premier conducteur de bobine (31) est connecté au premier conducteur plan (21). Dans une vue en plan (vue directionnelle d'axe Z) du premier conducteur plan (21), le premier conducteur de bobine (31) et le second conducteur de bobine (32) sont positionnés l'une en face de l'autre, à travers l'ouverture de bobine (CP), dans une première direction (direction d'axe X). La surface du premier conducteur plan (21) est supérieure à la surface de l'ouverture de bobine (CP) telle qu'observée dans la direction de l'axe Z.
PCT/JP2017/028669 2016-08-10 2017-08-08 Dispositif d'antenne et instrument électronique WO2018030363A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0522017A (ja) * 1991-07-12 1993-01-29 Toshiba Corp 多重ループアンテナ
JP2000114992A (ja) * 1998-09-29 2000-04-21 Seiko Epson Corp 送信機及び受信機
JP2010272963A (ja) * 2009-05-19 2010-12-02 Mitsubishi Electric Corp アンテナ装置
WO2012050037A1 (fr) * 2010-10-12 2012-04-19 株式会社村田製作所 Appareil de type antenne et appareil de type terminal de communication
JP2014011533A (ja) * 2012-06-28 2014-01-20 Nec Tokin Corp アンテナ装置
WO2015141082A1 (fr) * 2014-03-17 2015-09-24 株式会社村田製作所 Dispositif d'antenne et terminal de communication sans fil
WO2015166834A1 (fr) * 2014-04-30 2015-11-05 株式会社村田製作所 Dispositif antenne et dispositif électronique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0522017A (ja) * 1991-07-12 1993-01-29 Toshiba Corp 多重ループアンテナ
JP2000114992A (ja) * 1998-09-29 2000-04-21 Seiko Epson Corp 送信機及び受信機
JP2010272963A (ja) * 2009-05-19 2010-12-02 Mitsubishi Electric Corp アンテナ装置
WO2012050037A1 (fr) * 2010-10-12 2012-04-19 株式会社村田製作所 Appareil de type antenne et appareil de type terminal de communication
JP2014011533A (ja) * 2012-06-28 2014-01-20 Nec Tokin Corp アンテナ装置
WO2015141082A1 (fr) * 2014-03-17 2015-09-24 株式会社村田製作所 Dispositif d'antenne et terminal de communication sans fil
WO2015166834A1 (fr) * 2014-04-30 2015-11-05 株式会社村田製作所 Dispositif antenne et dispositif électronique

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