WO2015025833A1 - アンテナ装置及び通信装置 - Google Patents
アンテナ装置及び通信装置 Download PDFInfo
- Publication number
- WO2015025833A1 WO2015025833A1 PCT/JP2014/071613 JP2014071613W WO2015025833A1 WO 2015025833 A1 WO2015025833 A1 WO 2015025833A1 JP 2014071613 W JP2014071613 W JP 2014071613W WO 2015025833 A1 WO2015025833 A1 WO 2015025833A1
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- WIPO (PCT)
- Prior art keywords
- antenna
- circuit
- substrate
- antenna coil
- coil
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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 a communication device that are incorporated in an electronic device and can communicate by receiving a magnetic field transmitted from a transmitter.
- an antenna module for RFID Radio Frequency Identification
- RFID Radio Frequency Identification
- This antenna module communicates with an antenna coil mounted on a transmitter such as a reader / writer using inductive coupling. That is, this antenna module drives an IC functioning as a communication processing unit by receiving a magnetic field from a reader / writer and converting it into electric power.
- the antenna module needs to receive a magnetic flux of a certain value or more from the reader / writer with the antenna coil in order to reliably communicate. Therefore, in the antenna module according to the conventional example, a loop coil is provided in the casing of the mobile phone, and the loop coil receives the magnetic flux from the reader / writer.
- an antenna module incorporated in an electronic device such as a cellular phone has a magnetic flux from the reader / writer due to an eddy current generated when a metal such as a substrate or a battery pack inside the device receives a magnetic field from the reader / writer. Since it is bounced back, the magnetic flux reaching the loop coil is reduced. Since the magnetic flux reaching the loop coil is reduced, the antenna module requires a loop coil having a certain size of opening in order to collect the necessary magnetic flux, and further, the magnetic flux collected in the opening by using a magnetic sheet. It is necessary to increase.
- Patent Document 1 proposes an antenna structure in which a coil is wound around a ferrite core in order to reduce the area occupied by the coil.
- the antenna module as described above is electrically connected to a communication processing unit that performs transmission and reception, and communicates with electronic devices such as a reader / writer and a non-contact IC card. Since signals to be transmitted and received modulate high frequency, it is necessary to match the input / output impedance of the communication processing unit with the input / output impedance of the antenna module in order to ensure communication characteristics such as transmission / reception efficiency and coupling coefficient. .
- a matching circuit that performs impedance matching with the communication processing unit may be mounted on the antenna module in order to reduce the size of the device on which the antenna module is mounted. As described above, by adding the magnetic sheet to the antenna coil, the communication characteristics of the antenna can be improved.
- the antenna module is provided.
- a matching circuit or the like it is necessary to increase the area of the antenna substrate on which the antenna coil is formed. Further, if a space for circuit arrangement is provided on the antenna substrate, there is a problem that an effective opening area of the antenna is reduced and communication characteristics are deteriorated.
- An object is to provide an antenna device and a communication device.
- the present invention is an antenna device that is incorporated in an electronic device and can communicate by receiving a magnetic field transmitted from a transmitter, and circulates around a substrate and one surface of the substrate.
- the formed antenna coil, the magnetic sheet that is inserted into the central portion of the antenna coil and draws the magnetic field from the transmitter, and the other surface of the substrate is formed at a position that avoids the position where the magnetic sheet is inserted,
- at least one part of the winding of an antenna coil surrounds a circuit part, It is characterized by the above-mentioned.
- the present invention is a communication device incorporated in an electronic device and capable of communicating by receiving a magnetic field transmitted from a transmitter.
- the antenna coil is formed so as to circulate on one surface of the substrate.
- a magnetic sheet that is inserted into the center portion of the antenna coil and draws the magnetic field from the transmitter, and is formed on the other surface of the substrate at a position that avoids the position where the magnetic sheet is inserted, and is connected to an external circuit,
- an antenna device having a circuit portion including one or more circuit elements.
- the antenna device is characterized in that at least a part of the winding of the antenna coil surrounds the circuit unit.
- the circuit part is formed on the other surface of the substrate, and at least a part of the loop antenna winding surrounds at least a part of the circuit element of the circuit part, so that the opening area of the loop antenna is not reduced.
- a circuit portion can be mounted, and miniaturization of the antenna device and the communication device can be realized.
- FIG. 1 is a diagram for explaining a configuration of a wireless communication system in which an antenna device and a communication device to which the present invention is applied are incorporated.
- FIG. 2 is a diagram illustrating a configuration example of an antenna device according to an embodiment of the present invention.
- 2A is a plan view
- FIG. 2B is a bottom view
- FIG. 2C is a cross-sectional view taken along line AA ′ of FIG. 2A.
- FIG. 3 is a diagram showing a modification of the configuration of the antenna device according to the embodiment of the present invention.
- 3A is a plan view and FIG. 3B is a bottom view.
- FIG. 4 is a circuit diagram of an example of an antenna device to which the present invention is applied.
- FIG. 4 is a circuit diagram of an example of an antenna device to which the present invention is applied.
- FIG. 5A is a plan view showing the shape and dimensions of an embodiment of the antenna device
- FIG. 5B is a plan view showing the shape and size of a conventional antenna device as a comparative example
- FIG. 5C is a diagram of the antenna device of the reference example. It is a top view which shows a shape dimension.
- FIG. 6A is a perspective view showing a measurement system for measuring the communication characteristics of the antenna device according to the embodiment, the comparative example, and the reference example, and the reader / writer.
- FIG. 6B is a diagram for explaining the definition of the offset distance a.
- FIG. 7 is a graph in which the coupling coefficient of each antenna coil is measured and plotted against the offset distance a as the communication characteristics between the antenna device and the reader / writer.
- a communication apparatus to which the present invention is applied is an apparatus that is incorporated in an electronic device and can communicate by receiving a magnetic field transmitted from a transmitter.
- a RFID Radio Frequency Identification
- the wireless communication system 100 is used by being incorporated.
- the wireless communication system 100 includes a communication device 1 and a reader / writer 120 that accesses the communication device 1 in a contactless manner.
- the communication device 1 and the reader / writer 120 are arranged to face each other in the xy plane of the three-dimensional orthogonal coordinate system xyz.
- the reader / writer 120 functions as a transmitter that transmits a magnetic field in the positive z-axis direction to the communication devices 1 that face each other in the xy plane, and specifically, an antenna that transmits a magnetic field toward the communication device 1. 121 and a control board 122 that communicates with the communication device 1 that is inductively coupled via the antenna 121.
- the reader / writer 120 has a control board 122 that is electrically connected to the antenna 121.
- a control circuit composed of electronic components such as one or a plurality of integrated circuit chips is mounted on the control board 122.
- the control circuit executes various processes based on the data received from the communication device 1. For example, when transmitting data to the communication device 1, the control circuit encodes the data, modulates a carrier wave of a predetermined frequency (for example, 13.56 MHz) based on the encoded data, and modulates the modulation.
- the signal is amplified, and the antenna 121 is driven by the amplified modulation signal.
- the control circuit When reading data from the communication apparatus 1, the control circuit amplifies the modulation signal of the data received by the antenna 121, demodulates the modulation signal of the amplified data, and decodes the demodulated data.
- a coding method and a modulation method used in a general reader / writer are used. For example, a Manchester coding method or an ASK (Amplitude Shift Keying) modulation method is used.
- the communication device 1 is incorporated in a housing of a mobile phone 130 that is arranged so as to face the reader / writer 120 in the xy plane, for example, and can communicate with the reader / writer 120 that is inductively coupled. Is provided with the antenna module 2 having the antenna substrate 11 mounted thereon.
- an antenna coil 11a is formed by patterning a wiring of Cu or Al on a flexible substrate such as polyimide using a printing technique.
- a circuit mounting shared region 20 for mounting a matching circuit 28 and the like for matching the impedance between the antenna coil 11 a and the communication processing unit 30 outside the antenna module 2 to be electrically connected is formed. ing.
- the antenna coil 11a and the matching circuit 28 and the like mounted on the circuit mounting shared area 20 are electrically connected using a known technique such as a via hole.
- the antenna module 2 is electrically connected to the communication processing unit 30 mounted on the main body side of the mobile phone 130 via a connector or the like.
- the antenna coil 11a When the antenna coil 11a receives a magnetic field transmitted from the reader / writer 120, the antenna coil 11a is magnetically coupled by inductively coupling with the antenna 121 of the reader / writer 120, receives the modulated electromagnetic wave, and converts the received signal into a matching circuit.
- the data is supplied to the communication processing unit 30 mounted on the main body side of the mobile phone 130 via 28 or the like.
- the communication processing unit 30 is driven by a current flowing through the antenna coil 11 a and performs communication with the reader / writer 120. More specifically, the communication processing unit 30 demodulates the received modulation signal, decodes the demodulated data, and writes the decoded data to the internal memory based on an instruction from the communication processing unit 30.
- the communication processing unit 30 reads data to be transmitted to the reader / writer 120 from the internal memory, encodes the read data, modulates the carrier wave based on the encoded data, and is magnetically coupled by inductive coupling.
- the modulated radio wave is transmitted to the reader / writer 120 via the coil 11a.
- the antenna module 2 includes an antenna substrate 11 and an antenna coil 11a formed on one surface of the antenna substrate 11, as shown in FIG. 2A.
- the antenna substrate 11 is preferably a flexible printed circuit board and has a rectangular shape having a long side and a short side.
- the antenna coil 11a is a loop antenna formed so as to circulate on the antenna substrate 11, and is preferably formed by a wiring pattern formed on the flexible printed circuit board.
- the antenna coil 11a starts to be wound from the outer edge of the antenna substrate 11, and is wound toward the inside of the antenna substrate 11 by a predetermined number of turns.
- a slit 14 is opened at a substantially central portion of the antenna coil 11a in a direction along the long side of the antenna substrate 11.
- the magnetic sheet 13 that collects the magnetic flux from the reader / writer 120 and guides it to the antenna coil 11 a is inserted into the slit 14.
- a circuit mounting shared region 20 is formed on the other surface of the antenna substrate 11 where a matching circuit 28 for connecting the antenna coil 11a and the communication processing unit 30 while impedance matching is mounted. Therefore, the slit 14 is formed in the antenna coil occupation area 10 adjacent to the circuit mounting shared area 20.
- the antenna module 2 is impedance-matched with the antenna coil 11 a and the communication processing unit 30 for transmission / reception installed on the main body side of the mobile phone 130 on the other surface of the antenna substrate 11.
- the circuit mounting shared area 20 in which the matching circuit 28 and the like that make a general connection can be mounted.
- the circuit mounting shared area 20 is preferably arranged on one short side of the antenna substrate 11.
- circuit mounting shared area 20 limiting resistors 21 a and 21 b for setting a Q (Quality factor) value when a resonant circuit is configured by the inductance of the antenna coil 11 a and a resonant capacitor, and a communication processing unit 30.
- the circuit mounting shared area 20 includes terminals 26a and 26b and a ground terminal 27 for connection to the communication processing unit 30 via the low-pass filter 29, the matching circuit 28, and the like.
- the antenna coil 11a is not limited to a configuration in which the coil starts from the outer edge of the antenna substrate 11 and is wound along the outer edge of the antenna substrate 11 for all the turns. As shown in FIGS. 3A and 3B, only a part of the antenna coil 11a may circulate around the outer edge on the circuit mounting shared area 20 side. That is, the antenna module 2a includes the antenna substrate 11 and the antenna coil 11a formed on one surface of the antenna substrate 11, as in the case of FIGS. 2A to 2C. A circuit mounting shared area 20 on which a matching circuit 28 and the like that electrically connect the coil 11a and the communication processing unit 30 while impedance matching is mounted is formed, and a magnetic field from the antenna 121 of the reader / writer 120 is collected to collect the antenna.
- a magnetic sheet 13 led to the coil 11 a is inserted into the slit 14.
- the antenna coil 11a is formed on the antenna substrate 11 along the outer edge of the antenna substrate 11, whereas in this modification, the outermost side of the antenna coil 11a. Are formed along the outer edge of the antenna substrate 11, and the second turn winding is wound in the antenna coil occupation region 10 adjacent to the circuit mounting shared region 20 of the antenna substrate 11.
- the outermost winding of the antenna coil 11a that is, only the first turn winding is not limited to being formed from the antenna coil occupation area 10 to the circuit mounting shared area 20, but the second turn, the third turn, etc. Needless to say, it may be wound up.
- the antenna modules 2 and 2a to which the present invention is applied include an antenna coil 11a on the antenna substrate 11 and a damping resistor that adjusts the Q of a resonance circuit composed of the antenna coil 11a.
- R1, R2) 21a, 21b a matching circuit 28 for impedance matching between the antenna coil 11a and a circuit connected to the antenna coil 11a, and spurious suppression of a drive signal for driving the antenna coil 11a by the communication processing unit 30
- the low-pass filter 29 is connected in cascade.
- a communication processing unit 30 for exchanging transmission / reception signals with the antenna modules 2 and 2a is connected via the connection terminals (TX1, TX2) 26a and 26b and the ground terminal (G) 27 of the antenna modules 2 and 2a.
- the above-described circuit configuration is an example of a differential circuit configuration connected to the communication processing unit 30 having a balanced input / output.
- the circuit configuration may be a single-ended circuit configuration corresponding to an unbalanced input / output, or a low-pass filter circuit. Needless to say, the configuration can be changed.
- the functional blocks of the circuit mounted in the circuit mounting shared area 20 are not limited to the case where all the functional blocks described above are mounted, and it is of course possible to select only the matching circuit 28 or the like.
- the matching circuit 28 and the like By mounting the matching circuit 28 and the like on the antenna modules 2 and 2a side, it is possible to receive the technical standard conformity certification of the specific radio equipment as the antenna module, and to simplify the authentication procedure of the electronic device equipped with this antenna module. There is also an advantage of being able to.
- a circuit mounting shared area 20 was provided adjacent to the antenna coil occupation area 10.
- a 4-turn antenna coil 11a was formed on one surface of the polyimide substrate with Cu foil.
- the slit 14 for inserting the magnetic sheet was formed only in the antenna coil occupation region 10, and the magnetic sheet 13 made of Ni—Zn ferrite was inserted.
- Example 1 As Example 1, the first turn of the antenna coil 11a was formed along the outermost periphery of the polyimide substrate of FIG. 5A, and the second to fourth turns were formed in the antenna coil occupation region 10.
- ⁇ Comparative example> As a comparative example, as shown in FIG. 5B, winding of the first turn was started from the outermost periphery of the polyimide substrate to form a 4-turn antenna coil 11a.
- the size of the polyimide substrate was made substantially the same as the antenna coil occupation region 10 in the antenna module in the case of FIG. 5A. Further, the same magnetic sheet 13 made of Ni—Zn ferrite as used in the antenna module of FIG. 5A was inserted.
- the dimension of the slit 14 is also the same as that of FIG. 5A.
- FIG. 5C Winding of the first turn was started from the outermost periphery of the polyimide substrate to form a four-turn antenna coil 11a.
- the size of the polyimide substrate is the same as that of FIG. 5A.
- a slit 14a was formed with a width approximately equal to the width of the long side of the polyimide substrate, and a magnetic sheet 13a made of Ni—Zn ferrite was inserted into the slit 14a. Therefore, the width of the magnetic sheet 13a is wider than that of FIGS. 5A and 5B.
- the antenna module for measuring the communication characteristics was arranged with the opening surface facing the antenna 121 of the reader / writer 120 and separated from the origin (O) 121a by 20 mm in the z direction.
- the relative position between the antenna module and the reader / writer 120 is defined as an offset distance a.
- the offset distance a is a distance at which the end on the long side of the antenna module protrudes in the x direction from the origin (O) 121a.
- the coupling coefficient k between the antenna coil of the antenna module and the antenna 121 of the reader / writer 120 was measured while changing the offset distance a.
- FIG. 7 shows a graph in which changes of the coupling coefficient k with respect to the offset distance a are plotted for each of the antenna modules having the configurations of Example 1, Example 2, Comparative Example, and Reference Example.
- Example 1 Both the antenna modules of Example 1 and Example 2 were able to realize a high coupling coefficient with respect to the antenna module of the comparative example, indicating that the communication characteristics were good.
- the number of turns that circulates around the outermost periphery of the antenna substrate is one turn, and the remaining number of turns is formed in the antenna coil occupation region, so that all four turns are wound from the outermost periphery.
- the coupling coefficient was lower than that of Example 2, it was a level comparable to that of Reference Example.
- 1 communication device 2, 2a antenna module, 10 antenna coil occupation area, 11 antenna substrate, 11a antenna coil, 13 magnetic sheet, 14 slit, 20 circuit mounting shared area, 28 matching circuit, 29 low pass filter, 30 communication processing unit, 120 reader / writer, 121 antenna, 122 control board, 130 mobile phone
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Abstract
Description
本発明が適用されたアンテナモジュールと従来構造のアンテナモジュールとの通信特性を比較する実験を行った。
実施例1として、アンテナコイル11aの1ターン目を図5Aのポリイミド基板の最外周に沿って形成し、2ターン目~4ターン目をアンテナコイル占有領域10内に形成した。
比較例として、図5Bに示すように、ポリイミド基板の最外周から1ターン目の巻回を開始し、4ターンのアンテナコイル11aを形成した。ポリイミド基板のサイズは、図5Aの場合のアンテナモジュールにおけるアンテナコイル占有領域10とほぼ同一となるようにした。また、図5Aのアンテナモジュールに用いたものと同一のNi-Znフェライト製の磁性シート13を挿入した。スリット14の寸法も、図5Aのものと同一である。
参考例として、図5Cに示すように、ポリイミド基板の最外周から1ターン目の巻回を開始し、4ターンのアンテナコイル11aを形成した。ポリイミド基板のサイズは、図5Aのものと同一である。ポリイミド基板の長辺の幅にほぼ等しい幅にスリット14aを形成し、スリット14aには、Ni-Znフェライト製の磁性シート13aを挿入した。したがって、磁性シート13aの幅は、図5A及び図5Bのものよりも広い。
アンテナモジュールの通信特性は、図6Aに示す測定系を構成して測定した。具体的な評価条件としては、以下のようにした。すなわち、リーダライタ120のアンテナ121は、リーダライタ120の中心をxyz座標の原点(O)121aとするx×y=70mm×40mmの4ターンの方形コイルとした。通信特性を測定するアンテナモジュールは、開口面をリーダライタ120のアンテナ121に対向させ、原点(O)121aからz方向に20mm離間して配置した。ここで、図6Bに示すように、アンテナモジュールとリーダライタ120との相対的位置をオフセット距離aとして定義した。オフセット距離aは、原点(O)121aからアンテナモジュールの長辺側の端部がx方向に突出する距離をいうものとする。オフセット距離aを変化させて、アンテナモジュールのアンテナコイルと、リーダライタ120のアンテナ121との結合係数kを測定した。
実施例1、実施例2、比較例及び参考例の構成のアンテナモジュールのそれぞれについて、オフセット距離aに対する結合係数kの変化をプロットしたグラフを図7に示す。
Claims (4)
- 電子機器に組み込まれ、発信器から発信される磁界を受けて通信可能となるアンテナ装置において、
基板と、
上記基板の一方の面に周回するように形成されたアンテナコイルと、
上記アンテナコイルの中心部分に差し込まれて上記発信器からの磁界を引き込む磁性シートと、
上記基板の他方の面に、上記磁性シートが差し込まれた位置を回避する位置に形成され、外部回路に接続され、1つ以上の回路要素を含む回路部とを備え、
上記アンテナコイルの巻き線の少なくとも一部が、上記回路部を取り囲むことを特徴とするアンテナ装置。 - 上記回路部のうち上記回路要素の少なくとも一部が、上記アンテナコイルに取り囲まれることを特徴とする請求項1記載のアンテナ装置。
- 上記回路部は、外部の駆動回路とのインピーダンス整合をとる整合回路であることを特徴とする請求項1又は2記載のアンテナ装置。
- 電子機器に組み込まれ、発信器から発信される磁界を受けて通信可能となる通信装置において、
基板と、該基板の一方の面に周回するように形成されたアンテナコイルと、該アンテナコイルの中心部分に差し込まれて上記発信器からの磁界を引き込む磁性シートと、該基板の他方の面に、該磁性シートが差し込まれた位置を回避する位置に形成され、外部回路に接続され、1つ以上の回路要素を含む回路部とを有するアンテナ装置を備え、
上記アンテナコイルの巻き線の少なくとも一部が、上記回路部を取り囲むことを特徴とする通信装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US14/912,459 US20160204500A1 (en) | 2013-08-22 | 2014-08-19 | Antenna device and communication device |
CN201480046435.8A CN105493346A (zh) | 2013-08-22 | 2014-08-19 | 天线装置及通信装置 |
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JP2013-171951 | 2013-08-22 | ||
JP2013171951A JP6122362B2 (ja) | 2013-08-22 | 2013-08-22 | アンテナ装置及び通信装置 |
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WO2015025833A1 true WO2015025833A1 (ja) | 2015-02-26 |
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US (1) | US20160204500A1 (ja) |
JP (1) | JP6122362B2 (ja) |
CN (1) | CN105493346A (ja) |
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Cited By (3)
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US20180082782A1 (en) * | 2015-04-08 | 2018-03-22 | Nissan Motor Co., Ltd. | Ground-side coil unit |
CN110781696A (zh) * | 2018-07-27 | 2020-02-11 | 日本电产三协株式会社 | 非接触式通信模块及读卡器 |
CN113540754A (zh) * | 2020-04-22 | 2021-10-22 | 江原磁石技术株式会社 | 利用多线嵌入的收发天线模块 |
Families Citing this family (2)
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US10050678B2 (en) * | 2015-07-08 | 2018-08-14 | Continental Automotive France | Radiofrequency transmission device |
JP6630308B2 (ja) * | 2017-04-05 | 2020-01-15 | 矢崎総業株式会社 | アンテナユニット |
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JP2009152862A (ja) * | 2007-12-20 | 2009-07-09 | Tamura Seisakusho Co Ltd | 可変インダクタンスコイル、並びにそれを備えたブースターアンテナおよび読取書込装置 |
JP2010252402A (ja) * | 2010-08-12 | 2010-11-04 | Murata Mfg Co Ltd | アンテナ |
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JP3570430B1 (ja) * | 2003-10-29 | 2004-09-29 | オムロン株式会社 | ループコイルアンテナ |
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US8474726B2 (en) * | 2010-08-12 | 2013-07-02 | Feinics Amatech Teoranta | RFID antenna modules and increasing coupling |
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2013
- 2013-08-22 JP JP2013171951A patent/JP6122362B2/ja active Active
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2014
- 2014-08-19 US US14/912,459 patent/US20160204500A1/en not_active Abandoned
- 2014-08-19 WO PCT/JP2014/071613 patent/WO2015025833A1/ja active Application Filing
- 2014-08-19 CN CN201480046435.8A patent/CN105493346A/zh active Pending
- 2014-08-22 TW TW103128894A patent/TW201513458A/zh unknown
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JP2009152862A (ja) * | 2007-12-20 | 2009-07-09 | Tamura Seisakusho Co Ltd | 可変インダクタンスコイル、並びにそれを備えたブースターアンテナおよび読取書込装置 |
JP2011229133A (ja) * | 2010-03-31 | 2011-11-10 | Sony Chemical & Information Device Corp | アンテナ装置、通信装置 |
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US20180082782A1 (en) * | 2015-04-08 | 2018-03-22 | Nissan Motor Co., Ltd. | Ground-side coil unit |
US10199163B2 (en) * | 2015-04-08 | 2019-02-05 | Nissan Motor Co., Ltd. | Ground-side coil unit |
CN110781696A (zh) * | 2018-07-27 | 2020-02-11 | 日本电产三协株式会社 | 非接触式通信模块及读卡器 |
CN110781696B (zh) * | 2018-07-27 | 2023-10-31 | 日本电产三协株式会社 | 非接触式通信模块及读卡器 |
CN113540754A (zh) * | 2020-04-22 | 2021-10-22 | 江原磁石技术株式会社 | 利用多线嵌入的收发天线模块 |
Also Published As
Publication number | Publication date |
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CN105493346A (zh) | 2016-04-13 |
JP2015041888A (ja) | 2015-03-02 |
JP6122362B2 (ja) | 2017-04-26 |
TW201513458A (zh) | 2015-04-01 |
US20160204500A1 (en) | 2016-07-14 |
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