WO2017047483A1 - アンテナ装置および電子機器 - Google Patents

アンテナ装置および電子機器 Download PDF

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Publication number
WO2017047483A1
WO2017047483A1 PCT/JP2016/076377 JP2016076377W WO2017047483A1 WO 2017047483 A1 WO2017047483 A1 WO 2017047483A1 JP 2016076377 W JP2016076377 W JP 2016076377W WO 2017047483 A1 WO2017047483 A1 WO 2017047483A1
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WO
WIPO (PCT)
Prior art keywords
coil
planar conductor
antenna
coil antenna
magnetic body
Prior art date
Application number
PCT/JP2016/076377
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English (en)
French (fr)
Japanese (ja)
Inventor
高橋博宣
小林英晃
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 JP2017539862A priority Critical patent/JP6323616B2/ja
Priority to CN201690001021.8U priority patent/CN207834575U/zh
Publication of WO2017047483A1 publication Critical patent/WO2017047483A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • the present invention relates to an antenna device used in, for example, a short-range communication system and a non-contact power transmission system, and an electronic apparatus including the antenna device.
  • Patent Document 1 discloses an antenna device used in a near field communication system such as NFC (Near Field Communication) or a non-contact power transmission system.
  • Patent Document 1 describes that a metal plate acts as a radiating element by magnetically coupling a power transmission coil and a short-distance communication coil to a metal plate. Moreover, the structure which has arrange
  • the size of the coil antenna naturally becomes smaller if sufficient space cannot be secured inside the housing.
  • An antenna device used in a short-range communication system or a non-contact power transmission system includes a coil antenna. And in order to raise electric power transmission amount, it is important to raise the coupling
  • the coil antenna and the planar conductor are strongly magnetically coupled.
  • simply disposing a magnetic material does not sufficiently enhance the magnetic field coupling between the coil and the conductive member, and the planar conductor may not function sufficiently as a magnetic flux radiating element.
  • simply providing a large-sized magnetic body cannot provide a high enough bond for the cost.
  • the magnetic material sheet shown in Patent Document 1 is provided to suppress unnecessary magnetic field coupling between the coil antenna and the printed wiring board.
  • An object of the present invention is to provide an antenna device in which the degree of coupling of magnetic field coupling with a coil antenna of a counterpart device is effectively increased, and an electronic apparatus including the antenna device.
  • An antenna device of the present invention includes a planar conductor, a coil antenna, and a magnetic body,
  • the coil antenna has a coil conductor wound around a coil opening and constituting one or more layers;
  • the coil conductor is close to the outer edge of the planar conductor, and at least a part of the coil opening overlaps with a region outside the outer edge of the planar conductor in a plan view of the coil opening,
  • the magnetic body is disposed at a position not interposed between the planar conductor and the coil antenna,
  • the magnetic body has an extending portion that extends from the coil antenna toward the outer edge of the planar conductor along the planar conductor.
  • the planar conductor faces the coil antenna of the counterpart device, so that the magnetic body is disposed on the opposite side of the counterpart device, and the side on which the magnetic body is not disposed (the counterpart side) Magnetic flux spreads in the device direction), the coil antenna of the counterpart device and the planar conductor are strongly magnetically coupled, and the coil antenna of the antenna device is strongly magnetically coupled to the coil antenna of the counterpart device.
  • the coil conductor overlaps the planar conductor.
  • the coil antenna and the planar conductor of the antenna device are strongly magnetically coupled, and the degree of magnetic field coupling between the coil antenna of the antenna device and the coil antenna of the counterpart device is further increased.
  • the planar conductor has a notch at an outer edge, and at least a part of the coil opening overlaps the notch of the planar conductor in plan view. preferable.
  • the coil antenna of the antenna device and the planar conductor are strongly coupled, and the degree of magnetic field coupling between the coil antenna of the antenna device and the coil antenna of the counterpart device is further increased.
  • the coil antenna is preferably disposed between the planar conductor and the magnetic body. As a result, leakage magnetic flux from the coil antenna of the antenna device is hardly generated, and the coil antenna of the antenna device and the planar conductor are strongly magnetically coupled.
  • the extending portion is linear.
  • the length of the magnetic body in the longitudinal direction becomes the shortest, and the coil antenna of the antenna device and the planar conductor are strongly magnetically coupled.
  • the number of the extending portions is preferably plural. As a result, the coil antenna of the antenna device and the planar conductor are strongly magnetically coupled.
  • the electronic device of the present invention includes a planar conductor, a coil antenna, a magnetic body, and a housing.
  • the coil antenna is adjacent to an outer edge of the planar conductor;
  • the coil antenna has a coil conductor that is wound around a coil opening and forms one or more layers, and at least a part of the coil opening is more than an outer edge of the planar conductor in a plan view of the coil opening.
  • Overlap the outer area The magnetic body is disposed at a position not interposed between the planar conductor and the coil antenna, The magnetic body has an extending portion that extends from the coil antenna toward the outer edge of the planar conductor along the planar conductor, At least the magnetic body is housed in the housing.
  • the coil antenna of the electronic device is strongly magnetically coupled to the coil antenna of the counterpart device.
  • An electronic device of the present invention includes a coil antenna, a magnetic body, and a housing,
  • the housing is at least partially a planar conductor,
  • the coil antenna is adjacent to an outer edge of the planar conductor;
  • the coil antenna has a coil conductor that is wound around a coil opening and forms one or more layers, and at least a part of the coil opening is more than an outer edge of the planar conductor in a plan view of the coil opening.
  • the magnetic body is disposed at a position not interposed between the planar conductor and the coil antenna,
  • the magnetic body has an extending portion that extends from the coil antenna toward the outer edge of the planar conductor along the planar conductor, At least the magnetic body is housed in the housing.
  • the coil antenna of the electronic device is strongly magnetically coupled to the coil antenna of the counterpart device.
  • the electronic device according to (7) or (8) is connected to the coil antenna, for example, and is connected to the coil antenna and the coil antenna, and is used for the power transmission system.
  • a power transmission circuit As a result, not only short-distance communication but also non-contact power transmission of large power becomes possible while being a small antenna device.
  • an antenna device that effectively increases the degree of coupling of magnetic field coupling with the coil antenna of the counterpart device and an electronic device including the antenna device are configured.
  • FIG. 1 is a cross-sectional view of an electronic apparatus 201 according to the first embodiment.
  • FIG. 2 is a plan view showing a housing of the electronic device 201.
  • FIG. 3 is a plan view showing the configuration of the main part inside the housing of the electronic apparatus 201.
  • 4 (A) and 4 (B) are perspective views showing a coil antenna having coil conductors constituting a plurality of layers.
  • FIGS. 5A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D are plan views illustrating the configuration of the main part of the electronic apparatus according to the second embodiment.
  • FIGS. 5A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D are plan views illustrating the configuration of the main part of the electronic apparatus according to the second embodiment.
  • FIGS. 6A, 6 ⁇ / b> B, 6 ⁇ / b> C, and 6 ⁇ / b> D are diagrams illustrating the structure and arrangement of the magnetic body 30 included in the electronic apparatus according to the third embodiment.
  • FIGS. 7A, 7 ⁇ / b> B, and 7 ⁇ / b> C are diagrams illustrating the structure and arrangement of the magnetic body included in the electronic apparatus according to the fourth embodiment.
  • FIGS. 8A, 8 ⁇ / b> B, 8 ⁇ / b> C, and 8 ⁇ / b> D are diagrams illustrating the structure and arrangement of a magnetic body included in the electronic apparatus according to the fifth embodiment.
  • FIG. 9 is a cross-sectional view of an electronic device 206 according to the sixth embodiment.
  • FIG. 10 is a circuit diagram of a main part of an electronic apparatus according to the seventh embodiment.
  • First Embodiment an antenna device applied to a short-range communication system and a non-contact power transmission system and an electronic device including the antenna device will be described.
  • FIG. 1 is a cross-sectional view of an electronic apparatus 201 according to the first embodiment.
  • FIG. 2 is a plan view showing a housing of the electronic device 201.
  • FIG. 3 is a plan view showing the configuration of the main part inside the housing of the electronic apparatus 201.
  • the electronic device 201 is a so-called portable electronic device such as a smartphone, and a display 50 is provided on the first surface of the housing.
  • FIG. 2 is a plan view of the second surface of the housing.
  • the casing of the electronic device 201 includes a planar conductor 10 that is a metal casing and resin casings 91 and 92.
  • the planar conductor 10 has a notch 10C.
  • the lens portion of the camera module is disposed in the notch 10C.
  • FIGS. 1, 2, and 3 the lens portion and the like are not shown, and the notch 10 ⁇ / b> C is drawn open in order to clarify the structure according to the present invention. This applies not only to the present embodiment but also to the drawings shown in the following embodiments.
  • a coil antenna 20, a magnetic body 30, a circuit board 40, and the like are provided inside the housing.
  • the planar conductor 10, the coil antenna 20, and the magnetic body 30 constitute an antenna device according to the present invention.
  • the magnetic body 30 is, for example, a ferrite sheet obtained by molding a composite material of a resin material and magnetic ferrite powder into a sheet shape.
  • the magnetic body 30 is disposed at a position not interposed between the planar conductor 10 and the coil antenna 20.
  • the coil antenna 20 is disposed in a layer between the planar conductor 10 and the magnetic body 30.
  • the magnetic body 30 may be attached to the planar conductor 10 through an adhesive sheet (double-sided adhesive tape).
  • the magnetic body 30 may be attached to the circuit board 40 via an adhesive sheet.
  • the coil antenna 20 may be attached to the planar conductor 10 in an electrically insulated state, or may be attached to the magnetic body 30 in an electrically insulated state.
  • the coil conductor of the coil antenna 20 is electrically connected to a circuit formed on the circuit board 40.
  • the coil conductor 21 is close to the outer edge of the planar conductor 10.
  • the inner edge of the notch 10 ⁇ / b> C is a part of the outer edge of the planar conductor 10.
  • the coil conductor 21 is formed in one layer, and the shape thereof is a rectangular spiral shape or a spiral shape.
  • the rectangular coil antenna 20 may be constituted by the coil conductors 21 constituting the layers.
  • a helical coil antenna 20 may be constituted by coil conductors 21 constituting a plurality of layers.
  • the coil antenna 20 is wound around the coil opening 20AP and has a coil conductor 21 constituting one or a plurality of layers.
  • the coil opening 20AP at least partially overlaps the notch 10C of the planar conductor 10. That is, at least a part of the coil opening 20AP is exposed from the planar conductor 10 in plan view. In addition, at least a part of the coil conductor 21 overlaps the planar conductor 10 in plan view.
  • the magnetic body 30 includes a collective portion 32 that overlaps the cutout portion 10C of the planar conductor 10 and the coil opening 20AP, and an outer edge direction of the planar conductor 10 along the planar conductor 10 from the collective portion 32. And extending portions 31A, 31B, and 31C extending radially (thus linearly).
  • the magnetic flux generated from the coil antenna 20 passes through the magnetic body 30 having a high permeability. That is, the magnetic body 30 acts as a magnetic path with a high permeability, and the effect of magnetic flux radiation and magnetic collection of the coil antenna 20 is enhanced.
  • the magnetic body 30 can extend the magnetic path of high permeability to the outside of the circuit board 40, thereby preventing the collected magnetic flux from interlinking with the circuit board 40, and unnecessary magnetic field coupling with the circuit board 40. Can be suppressed. For this reason, it is preferable that the magnetic body 30 extends to the circuit board 40 or the outer edge portion of the planar conductor 10.
  • the magnetic flux passing through the magnetic body 30 is generated radially from the coil antenna 20, it is preferable to provide the extending portions 31 ⁇ / b> A, 31 ⁇ / b> B, and 31 ⁇ / b> C radially with respect to the coil antenna 20.
  • the shape of the extending portions 31A, 31B, and 31C is preferably linear because the magnetic flux generated from the coil antenna 20 is linear (radial), but may be configured with a curve.
  • the width of the extending portions 31A, 31B, and 31C is preferably equal to the length of each side of the rectangular shape. And when several extending part 31A, 31B, 31C touches each rectangular side of coil opening 20AP, the length which added the width
  • the length obtained by adding the widths of the extending portions 31A, 31B, and 31C is preferably equal to the length of the circular outer periphery of the coil opening 20AP.
  • the magnetic body 30 By arranging the magnetic body 30 in this way, the magnetic flux is efficiently radiated to the planar conductor 10 side, and the coupling degree of the magnetic field coupling between the coil antenna 20 and the planar conductor 10 can be further increased.
  • the planar conductor 10, the coil antenna 20 and the magnetic body 30 constitute an antenna device 101.
  • FIG. 1 also shows a coil antenna 210 of a counterpart device such as a charging stand.
  • the broken line indicates the state of the magnetic flux ⁇ that contributes to magnetic field coupling between the coil antenna 20 and the coil antenna 210 of the counterpart device.
  • the magnetic body 30 is disposed on the opposite side of the counterpart device, and thus the magnetic body 30.
  • the coil antenna 20 and the planar conductor 10 are strongly magnetically coupled, and the planar conductor 10 and the coil antenna 210 of the counterpart device are strongly coupled. Magnetic field coupling.
  • the metal casing part which is a part of the casing is used as the planar conductor, but the planar conductor may be formed on a part of the resin casing.
  • the magnetic body 30 may be a sintered ferrite plate in addition to the ferrite sheet. Furthermore, it may be a composite sheet in which an individualized sintered ferrite plate is attached to a flexible sheet.
  • FIGS. 5A, 5 ⁇ / b> B, 5 ⁇ / b> C, and 5 ⁇ / b> D are plan views showing the configuration of the main part of four electronic devices according to the second embodiment.
  • the planar conductor 10 has an example in which the inside has a cutout portion 10C having a circular shape. However, as illustrated in FIG. The shape without a notch may be sufficient. Further, as shown in FIG. 5B, the cutout portion 10C may have a shape extending from the outer edge to the inside with a constant width. Furthermore, the housing may include a plurality of metal housing portions. In the example of FIG. 5C, in addition to the planar conductor 10A corresponding to the main part on the plane side and the main part on the side surface side of the metal casing part, the main part other than the main part on the plane side and the side surface side of the metal casing part.
  • planar conductor 10B constituting a portion other than the main part is provided, and a notch 10C is provided between the planar conductors 10A and 10B.
  • This planar conductor 10A can be used in the same manner as the planar conductor 10 shown in FIG.
  • the planar conductors 10A and 10B can be used similarly to the planar conductor 10 and the notch 10C shown in FIG.
  • the coil antenna 20 includes a flexible substrate 22 and a rectangular spiral coil conductor 21 formed thereon.
  • the coil antenna 20 is configured by winding the conductor wire 21 covered with the insulator in a circular shape, similarly to the example shown in FIG. 3 in the first embodiment. .
  • a part of the coil opening 20AP overlaps with a region outside the outer edge of the planar conductor 10 of the coil opening 20AP in plan view.
  • at least a part of the coil conductor 21 overlaps the planar conductor 10 in plan view.
  • the coil antenna 20 is composed of a flexible base material 22 and a rectangular spiral coil conductor 21 formed thereon. And in planar view, a part of coil opening 20AP overlaps the area
  • spring pin terminals projecting from the circuit board 40 abut on both ends of the coil conductor 21 of the coil antenna 20. Thereby, the coil conductor 21 is electrically connected to the circuit formed in the circuit board 40 through the spring pin terminal.
  • the coil conductor 21 of the coil antenna 20 is a conductor pattern formed on a base material.
  • the magnetic body 30 extends linearly in the longitudinal direction from the coil antenna 20 along the planar conductor 10 toward the outer edge of the planar conductor 10. In these examples, the entire magnetic body 30 is an “extended portion”.
  • the magnetic body 30 extends halfway without reaching the outer edge of the planar conductor 10.
  • the arrangement relationship between the coil antenna 20 and the planar conductor 10 is as shown in FIG.
  • the magnetic body 30 extends linearly in the longitudinal direction from the coil antenna 20 along the planar conductor 10 in the two outer edge directions of the planar conductor 10 facing each other. That is, the entire magnetic body 30 is an “extended portion”.
  • 6A, 6B, 6C, and 6D are diagrams showing the structure and arrangement of the magnetic body 30 provided in the electronic apparatus according to the third embodiment.
  • FIGS. 5 (A), (B), (C), and (D). the arrangement relationship between the coil antenna 20 and its planar conductor 10 is as shown in FIGS. 5 (A), (B), (C), and (D). is there.
  • the magnetic body 30 extends linearly from the coil antenna 20 along the planar conductor 10 toward the outer edge of the planar conductor 10 in the short direction.
  • the magnetic bodies 30A and 30B extend linearly from the middle of the coil antenna 20 along the planar conductor 10 in the lateral direction toward the outer edge of the planar conductor 10, respectively.
  • the position where the magnetic bodies 30A and 30B are provided is preferably such that the distance from the outer edge of the planar conductor 10 to the outer edge of the coil antenna 20 is short.
  • the magnetic body 30 linearly extends in the short direction from the coil antenna 20 to the two outer edge directions of the planar conductor 10 facing each other.
  • the entire magnetic body 30 is an “extended portion”.
  • FIGS. 7A, 7B, and 7C are diagrams showing the structure and arrangement of magnetic bodies provided in the electronic apparatus according to the fourth embodiment.
  • FIGS. 5A, 5B, and 6C the arrangement relationship between the coil antenna 20 and the planar conductor 10 is shown in FIGS. 5A, 5B, and 6C, and FIGS. ).
  • the magnetic bodies 31 ⁇ / b> A, 31 ⁇ / b> B, and 31 ⁇ / b> C are formed along the planar conductor 10 from the coil opening 20 ⁇ / b> AP of the coil antenna 20 toward the outer edge of the planar conductor 10. It extends radially in a letter shape.
  • FIGS. 8A, 8B, 8C, and 8D are diagrams showing the structure and arrangement of magnetic bodies provided in the electronic apparatus according to the fifth embodiment.
  • FIGS. 5A, 5B, 5C, 6D, and 6A the arrangement relationship between the coil antenna 20 and the planar conductor 10 is shown in FIGS. 5A, 5B, 5C, 6D, and 6A, respectively.
  • (B) (C) (D) As shown.
  • the magnetic bodies 31D and 31E extend obliquely from the coil antenna 20 along the planar conductor 10 in the angular direction of the planar conductor 10.
  • the magnetic bodies 31A, 31B, 31C, 31D, and 31E extend radially from the coil antenna 20 along the planar conductor 10.
  • the magnetic bodies 31A, 31B, 31C, 31D, 31E, 31F, and 31G extend radially from the coil antenna 20 along the planar conductor 10.
  • openings are formed in the magnetic bodies 31A, 31B, 31C, 31D, 31E, 31F, and 31G at positions where the coil openings and the cutout portions of the planar conductors overlap.
  • an electronic device such as a camera module can be arranged in such a manner as to penetrate the coil antenna, the planar conductor, and the magnetic body, so that it is suitable for arranging a thick electronic device.
  • the conductor and the magnetic body can be brought closer to each other.
  • FIG. 9 is a cross-sectional view of an electronic device 206 according to the sixth embodiment. Unlike the electronic device 201 shown in FIG. 1 in the first embodiment, a resin casing 90 is provided, and the planar conductor 10 does not constitute a part of the casing. Further, the coil conductor 21 of the coil antenna is disposed on the opposite side of the surface of the magnetic body 30 with respect to the planar conductor 10.
  • the planar conductor 10 may be attached to the inner surface of the housing 90 via an adhesive sheet (double-sided adhesive tape).
  • the magnetic body 30 may be attached to the planar conductor 10 via an adhesive sheet, or may be attached to the circuit board 40.
  • the coil antenna 20 may be attached to the planar conductor 10 in an electrically insulated state, or may be attached to the inner surface of the housing 90.
  • Other configurations are the same as those of the electronic apparatus 201 of the first embodiment.
  • planar conductor 10 is disposed between the coil antenna 20 and the magnetic body 30 is also possible.
  • the broken line shows the state of the magnetic flux ⁇ that contributes to the magnetic field coupling between the coil antenna 20 and the coil antenna 210 of the counterpart device.
  • the magnetic body 30 is arranged on the opposite side of the counterpart device from the coil antenna 210, so that a magnetic flux is generated on the side where the magnetic body 30 is not arranged (toward the counterpart device).
  • the coil antenna 20 and the planar conductor 10 are strongly magnetically coupled, and the planar conductor 10 and the coil antenna 210 of the counterpart device are strongly magnetically coupled.
  • Seventh Embodiment an example of an antenna device applied to a short-range communication system and a non-contact power transmission system and a circuit connected to the antenna device will be described.
  • FIG. 10 is a circuit diagram of the main part of the electronic apparatus according to the seventh embodiment.
  • the structure of the coil antenna is as shown in the above embodiments.
  • an inductor L20 represents a coil antenna (coil antenna 20 shown in the above embodiments) by a circuit symbol of the inductor.
  • the switching circuit 1 is a circuit that selectively connects the coil antenna to one of the power transmission circuit 2 and the NFC communication circuit 3.
  • the inductor L20 and the capacitor C1 constitute an LC resonance circuit that resonates at a frequency for non-contact power transmission.
  • an LC resonance circuit that resonates at a frequency for NFC communication is configured by the inductor L20 and the capacitor C2.
  • the frequency for NFC communication is, for example, 13.56 MHz
  • the frequency for non-contact power transmission is, for example, 6.78 MHz, which is a half thereof.
  • Both are frequency bands in the HF band of ISM (Industrial, “Scientific” and “Medical” Band), and the planar conductor 10 already shown acts as a radiating element, and the magnetic body 30 can effectively use its magnetic permeability.

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PCT/JP2016/076377 2015-09-17 2016-09-08 アンテナ装置および電子機器 WO2017047483A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017539862A JP6323616B2 (ja) 2015-09-17 2016-09-08 アンテナ装置および電子機器
CN201690001021.8U CN207834575U (zh) 2015-09-17 2016-09-08 天线装置及电子设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-184284 2015-09-17
JP2015184284 2015-09-17

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WO2017047483A1 true WO2017047483A1 (ja) 2017-03-23

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JP (1) JP6323616B2 (zh)
CN (1) CN207834575U (zh)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002334314A (ja) * 2001-05-09 2002-11-22 Hanex Chuo Kenkyusho:Kk データキャリア構造及びその製造方法
JP2005228908A (ja) * 2004-02-13 2005-08-25 Mitsubishi Materials Corp 高周波磁芯材及びその製造方法並びに該磁芯材を備えたアンテナ
JP2012060372A (ja) * 2010-09-08 2012-03-22 Murata Mfg Co Ltd アンテナ装置および通信端末機器
JP2012200085A (ja) * 2011-03-22 2012-10-18 Toshiba Corp 無線電力伝送装置および無線電力伝送システム
JP2014022909A (ja) * 2012-07-18 2014-02-03 Nec Tokin Corp アンテナ装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002334314A (ja) * 2001-05-09 2002-11-22 Hanex Chuo Kenkyusho:Kk データキャリア構造及びその製造方法
JP2005228908A (ja) * 2004-02-13 2005-08-25 Mitsubishi Materials Corp 高周波磁芯材及びその製造方法並びに該磁芯材を備えたアンテナ
JP2012060372A (ja) * 2010-09-08 2012-03-22 Murata Mfg Co Ltd アンテナ装置および通信端末機器
JP2012200085A (ja) * 2011-03-22 2012-10-18 Toshiba Corp 無線電力伝送装置および無線電力伝送システム
JP2014022909A (ja) * 2012-07-18 2014-02-03 Nec Tokin Corp アンテナ装置

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CN207834575U (zh) 2018-09-07
JPWO2017047483A1 (ja) 2018-03-01

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