JP2010268306A - Coil antenna - Google Patents

Coil antenna Download PDF

Info

Publication number
JP2010268306A
JP2010268306A JP2009119027A JP2009119027A JP2010268306A JP 2010268306 A JP2010268306 A JP 2010268306A JP 2009119027 A JP2009119027 A JP 2009119027A JP 2009119027 A JP2009119027 A JP 2009119027A JP 2010268306 A JP2010268306 A JP 2010268306A
Authority
JP
Japan
Prior art keywords
coil conductor
coil
magnetic core
antenna
axis
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP2009119027A
Other languages
Japanese (ja)
Other versions
JP4883136B2 (en
Inventor
Hiromitsu Ito
Hiroyuki Kubo
Kuniaki Yosui
浩行 久保
宏充 伊藤
邦明 用水
Original Assignee
Murata Mfg Co Ltd
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 Murata Mfg Co Ltd, 株式会社村田製作所 filed Critical Murata Mfg Co Ltd
Priority to JP2009119027A priority Critical patent/JP4883136B2/en
Publication of JP2010268306A publication Critical patent/JP2010268306A/en
Application granted granted Critical
Publication of JP4883136B2 publication Critical patent/JP4883136B2/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00Loop 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
    • H01Q7/06Loop 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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00Loop 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
    • H01Q7/06Loop 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
    • H01Q7/08Ferrite rod or like elongated core
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/16Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/27Spiral antennas

Abstract

An object of the present invention is to provide a small coil antenna that operates even when placed close to a conductor plate and has a high degree of coupling with a communication partner antenna.
A lower coil conductor portion 11U and an upper layer coil conductor portion 11S each have a substantially rectangular spiral shape, and an inner end portion of the lower layer coil conductor portion 11U and an inner end portion of the upper layer coil conductor portion 11S are electrically connected. Thus, both are connected in series. Regarding the lower layer coil conductor part 11U and the upper layer coil conductor part 11S, the arrangement interval of the axis parallel parts PA parallel to the axial direction of the magnetic core 1 is narrower than the arrangement interval of the axis orthogonal part CA orthogonal to the axis of the magnetic core 1. . Moreover, it arrange | positions so that the axial parallel part PA of the upper layer coil conductor part 11S may overlap with the axial parallel part PA of the lower layer coil conductor part 11U.
[Selection] Figure 2

Description

  The present invention relates to a coil antenna used in an RFID (Radio Frequency Identification) system or the like that communicates with an external device via an electromagnetic field signal.

For example, Patent Document 1, Patent Document 2, and Patent Document 3 disclose a coil antenna mounted on a portable electronic device used in an RFID system.
FIG. 1 is a top view showing a structure of an antenna coil described in Patent Document 1. FIG. An antenna coil 30 shown in FIG. 1 includes an air-core coil 32 formed by spirally winding a conductor 31 (31a, 31b, 31e, 31d) in a plane on a film 32a, and the air-core coil 32. A flat magnetic core member 33 inserted into the air-core coil 32 so as to be substantially parallel to the plane is provided. The air core coil 32 is provided with a hole 32d, and a magnetic core member 33 is inserted into the hole 32d. The first terminal 31a and the connecting conductor 31e are connected by a through hole 32b, and the second terminal 31b and the connecting conductor 31e are connected by a through hole 32c. The magnetic antenna is disposed on the conductive plate 34.

  In addition, the antenna coil of Patent Document 2 is arranged so that the antenna magnetic core made of a planar body is inserted into the air core portion of the antenna coil and forms substantially the same plane as the antenna coil.

  In the coil antenna of Patent Document 3, a plurality of coils wound on a plane are arranged in multiple layers on the same central axis, coils of each layer are connected in series, and a member with high magnetic permeability is arranged between the coils of each layer Has been.

JP 2002-325013 A JP 2002-373319 A JP 2005-94319 A

  In general, if the coil antenna has the inductance required to resonate at a predetermined resonance frequency, the number of turns of the coil, the loss of the coil, and the thicker the magnetic core, the better the characteristics as the coil antenna, and the communication performance Will be better. However, the coil antennas disclosed in Patent Documents 1 to 3 have the following problems.

  In the antenna coils of Patent Documents 1 and 2, it is necessary to make the magnetic core thinner if the number of turns of the coil is increased, and if the magnetic core is made thicker, the number of turns of the coil cannot be increased. When the number of turns is increased, the coil loss increases.

  Moreover, the antenna coil of patent document 1 is a structure couple | bonded with the magnetic flux parallel to the back conductive plate 34, as FIG. 1 shows. For this reason, for example, when mounted on a mobile phone terminal, if the mobile phone terminal is mounted parallel to the circuit board inside the housing, the mobile phone terminal cannot be used while being held parallel to the surface of the reader / writer. .

  In the coil antenna of patent document 3, since the member (magnetic body core) with high magnetic permeability has faced the vertical direction, if this coil antenna is put on a conductor board, it cannot communicate.

  Accordingly, an object of the present invention is to provide a small coil antenna that operates even when placed close to a conductor plate and has a high degree of coupling with a communication partner antenna.

In order to solve the above problems, the coil antenna of the present invention is configured as follows.
(1) A flexible substrate on which a coil conductor is formed and a plate-like magnetic core,
Of the coil conductor, the arrangement interval of the portions parallel to the axis of the magnetic core is formed narrower than the arrangement interval of the portions orthogonal to the axis of the magnetic core.

(2) The coil conductor is composed of a plurality of layers, and portions of the coil conductors of each layer that are parallel to the axis of the magnetic core are arranged at positions overlapping each other.

(3) The coil conductor is formed in a spiral around the coil conductor opening, the flexible substrate has a hole formed in the coil conductor opening of the coil conductor, and the magnetic core is inserted through the hole. .

(4) The coil conductor is formed in a rectangular spiral shape having a portion parallel to the axis of the magnetic core and a portion orthogonal to the axis of the magnetic core at two locations, and the magnetic core is the coil Of the conductor, one of the two portions perpendicular to the axis of the magnetic core is covered.

(5) The coil conductor is formed in a spiral shape around the coil conductor opening, and the flexible substrate is bent at the coil conductor opening of the coil conductor so as to wrap the magnetic core.

According to the present invention, the following effects can be obtained.
(A) Even if it is arranged close to the conductor plate, it works and can communicate.

(B) Since the magnetic core can be thickened with the same antenna size, the magnetic flux passing through the magnetic core is increased, and the communication performance is improved.

(C) Since the line width of the coil can be increased with the same antenna size, the loss of the coil is reduced and the communication performance is improved.

(D) By increasing the pitch of the coil pattern, the coupling coefficient with the antenna coil on the communication partner side is increased, and the communication performance is improved.

it can.

It is a front view which shows the structure of the coil antenna described in patent document 1. It is a figure which shows the structure of the coil antenna which concerns on 1st Embodiment. FIG. 2A is a top view of the flexible substrate 101. FIG. 2B is a diagram illustrating the shape of the upper layer coil conductor portion 11 </ b> S of the coil conductor 11. FIG. 2C is a diagram showing the shape of the lower layer coil conductor portion 11U of the coil conductor 11. FIG. 2D is a diagram showing a state in which the lower layer coil conductor portion 11U and the upper layer coil conductor portion 11S overlap each other. 3A is a top view of the coil antenna 201, and FIG. 3B is a front view. It is a figure which shows the relationship between the length L of a coil, and a coupling coefficient. FIG. 5A is a top view of the coil antenna 202 according to the second embodiment, and FIG. 5B is a front view of the whole antenna device including the coil antenna 202. 6A is a top view of the coil antenna 203 according to the third embodiment, and FIG. 6B is a bottom view of the coil antenna 203. FIG. 6C is a front view of the entire antenna device including the coil antenna 203.

<< First Embodiment >>
FIG. 2 is a diagram illustrating the configuration of the coil antenna according to the first embodiment.
FIG. 2A is a top view of the flexible substrate 101 which is one of the constituent elements of the coil antenna. The flexible substrate 101 includes a base material 10 and a coil conductor 11. The coil conductor 11 is formed on the upper surface of the base material 10.

  FIG. 2B is a view showing the shape of the upper layer coil conductor portion 11S of the coil conductor 11. FIG. 2C is a view showing the shape of the lower layer coil conductor portion 11U of the coil conductor 11. FIG. 2D is a diagram showing a state in which the lower layer coil conductor portion 11U and the upper layer coil conductor portion 11S overlap each other.

  Each of the lower layer coil conductor part 11U and the upper layer coil conductor part 11S has a substantially rectangular spiral shape, and an insulating layer is interposed between the lower layer coil conductor part 11U and the upper layer coil conductor part 11S. However, the inner end portion of the lower layer coil conductor portion 11U and the inner end portion of the upper layer coil conductor portion 11S are electrically connected, and both are connected in series. Thus, the coil conductor 11 is spirally formed around the coil conductor opening CW.

  The flexible substrate 101 is provided with a terminal electrode 12 that is continuous with an outer end portion of the upper coil conductor portion 11S. Moreover, the terminal electrode 13 which conduct | electrically_connects to the outer edge part of the lower layer coil conductor part 11U is provided.

The lower layer coil conductor part 11U and the upper layer coil conductor part 11S may be formed on both sides of the base material of the flexible substrate instead of being formed on one side of the base material of the flexible substrate.
As shown in FIG. 2A, a hole (slit) S is formed in the base material 10 of the flexible substrate 101 at a position corresponding to the coil conductor opening CW.

3A is a top view of the coil antenna 201, and FIG. 3B is a front view.
A magnetic core 1 made of a rectangular ferrite sheet is inserted into the hole S of the flexible substrate 101. Thus, the coil antenna 201 is configured. The coil antenna 201 is disposed close to the planar conductor 2 to constitute an antenna device. The planar conductor 2 is a circuit board on which the coil antenna 201 is mounted. The coil antenna 201 is disposed so that the formation surfaces of the terminal electrodes 12 and 13 shown in FIG. 3A face the planar conductor (circuit board) 2.

  As shown in FIG. 2A, for the lower layer coil conductor portion 11U and the upper layer coil conductor portion 11S, the axis parallel portion PA parallel to the axial direction (left-right direction in the figure) (magnetic path direction) of the magnetic core 1 The arrangement interval is narrower than the arrangement interval of the axis orthogonal part CA orthogonal to the axis of the magnetic core 1. Furthermore, in this example, it arrange | positions so that the axial parallel part PA of the upper layer coil conductor part 11S may overlap with the axial parallel part PA of the lower layer coil conductor part 11U.

  Therefore, the magnetic core can be made thicker with the same antenna size, the coil line width can be made thicker with the same antenna size, and the pitch of the coil pattern can be further widened.

  Here, the simulation result of the resistance value representing the loss of the coil and the coupling coefficient representing the good communication performance (coupling coefficient with the coil antenna on the communication partner side) is shown. The simulation conditions are as follows.

<Each coil antenna>
(1) Coil antenna of the first conventional structure A coil antenna in which the coil conductor is wide and the magnetic core is thin without overlapping coils parallel to the length of the magnetic core. Size of the magnetic core 14 × 15 × 0.2 mm
Coil conductor wire width 0.1mm
(2) Coil antenna of the second conventional structure Coil antenna in which the coil conductor is thinned and the magnetic core is thickened without overlapping the coil parallel to the length of the magnetic core The size of the magnetic core 17 × 15 × 0.2 mm
Coil conductor wire width 0.1mm
(3) Coil antenna of the present invention Coil antenna in which coils parallel to the length of the magnetic core are stacked, the line width of the coil conductor is wide, and the magnetic core is thickened. Size of the magnetic core 17 × 15 × 0.2 mm
Coil conductor wire width 0.3mm
<Common Items>
Size of coil antenna of communication partner 100 × 100mm
Distance to communication partner coil antenna 30mm
Size of coil conductor of each coil antenna 20 × 15mm
Number of turns of coil conductor of each coil antenna 6
The relationship between the resistance value representing the loss of the coil and the coupling coefficient representing the good communication performance is as follows.

――――――――――――――――――――――――――――――
Coil antenna Resistance [Ω] Coupling coefficient ――――――――――――――――――――――――――――――
(1) 1.59 2.11%
(2) 2.00 2.29%
(3) 1.62 2.33%
――――――――――――――――――――――――――――――
Thus, a coil antenna having a high coupling coefficient with the counterpart antenna and a low resistance can be configured.

Next, FIG. 4 shows the relationship between the coil length (the size in the coil axis direction in the range wound around the magnetic core) L and the coupling coefficient. The simulation conditions are the same as those described above.
Thus, when the ratio of the coil length L to the axial length M of the magnetic core 1 exceeds 25%, the coupling coefficient reaches the maximum value. Therefore, the best communication performance can be obtained.

<< Second Embodiment >>
FIG. 5A is a top view of the coil antenna 202 according to the second embodiment, and FIG. 5B is a front view of the whole antenna device including the coil antenna 202.
The flexible substrate 102 includes a base material 10 and a coil conductor 11. The coil conductor 11 is formed on the upper surface of the base material 10.

  As in the case of the first embodiment, the coil conductor 11 includes a substantially rectangular spiral lower layer coil conductor portion and upper layer coil conductor portion. The difference from the coil antenna shown in the first embodiment is that the flexible substrate 102 and the magnetic core 1 are arranged so as to overlap each other.

The coil conductor 11 includes an axis parallel part PA parallel to the axis of the magnetic core 1 and an axis orthogonal part CA orthogonal to the axis of the magnetic core 1, and the arrangement interval of the axis parallel part PA is the arrangement interval of the axis orthogonal part CA. Narrower.
The magnetic core 1 covers one part of the two axis parallel parts PA of the coil conductor 11.

  Even with such a structure, a coil antenna having a high coupling coefficient with the counterpart antenna and a low resistance can be configured, as in the case of the first embodiment. In addition, a small coil antenna that operates even when placed close to the conductor plate can be configured.

<< Third Embodiment >>
6A is a top view of the coil antenna 203 according to the third embodiment, FIG. 6B is a bottom view of the coil antenna 203, and FIG. 6C is a front view of the entire antenna device including the coil antenna 203. FIG.

  The flexible substrate 103 includes a base material 10 and a coil conductor 11. The coil conductor 11 is formed on one surface of the base material 10.

  As with the first and second embodiments, the coil conductor 11 includes a substantially rectangular spiral lower layer coil conductor portion and upper layer coil conductor portion. The difference from the coil antenna shown in the second embodiment is that the flexible substrate 103 is bent and arranged so as to wrap the magnetic core 1.

The coil conductor 11 includes an axis parallel part PA parallel to the axis of the magnetic core 1 and an axis orthogonal part CA orthogonal to the axis of the magnetic core 1.
The flexible substrate 103 is bent along a line passing through the coil conductor opening CW of the coil conductor 11 and disposed so as to wrap the magnetic core 1.

  Even with such a structure, similarly to the first and second embodiments, a coil antenna having a high coupling coefficient with the counterpart antenna and a low resistance can be configured. In addition, a small coil antenna that operates even when placed close to the conductor plate can be configured.

CA ... Axis orthogonal part CW ... Coil conductor opening PA ... Axis parallel part S ... Hole 1 ... Magnetic core 2 ... Planar conductor 10 ... Base material 11 ... Coil conductor 11S ... Upper layer coil conductor part 11U ... Lower layer coil conductor part 12, 13 ... Terminal electrodes 101-103 ... Flexible substrates 201-203 ... Coil antenna

Claims (5)

  1. In a coil antenna comprising a flexible substrate on which a coil conductor is formed and a plate-like magnetic core,
    Of the coil conductor, a coil antenna in which an arrangement interval of a portion parallel to the axis of the magnetic core is formed narrower than an arrangement interval of a portion orthogonal to the axis of the magnetic core.
  2.   2. The coil antenna according to claim 1, wherein the coil conductor is formed of a plurality of layers, and portions of the coil conductors of each layer that are parallel to the axis of the magnetic core are arranged at positions overlapping each other.
  3.   The coil conductor is spirally formed around a coil conductor opening, the flexible substrate has a hole formed in the coil conductor opening of the coil conductor, and the magnetic core is inserted through the hole. Or the coil antenna of 2.
  4.   The coil conductor is formed in a rectangular spiral shape having a portion parallel to the axis of the magnetic core and a portion orthogonal to the axis of the magnetic core, respectively, and the magnetic core is formed of the coil conductor. 3. The coil antenna according to claim 1, wherein one of the two portions perpendicular to the axis of the magnetic core is covered.
  5.   The coil conductor is formed in a spiral shape around a coil conductor opening, and the flexible substrate is bent at the coil conductor opening of the coil conductor so as to wrap the magnetic core. The coil antenna described in 1.
JP2009119027A 2009-05-15 2009-05-15 Coil antenna Active JP4883136B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009119027A JP4883136B2 (en) 2009-05-15 2009-05-15 Coil antenna

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009119027A JP4883136B2 (en) 2009-05-15 2009-05-15 Coil antenna
CN 201010180738 CN101888021B (en) 2009-05-15 2010-05-14 Coil antenna
GB201008206A GB2470299B (en) 2009-05-15 2010-05-17 Coil antenna with a planar magnetic core

Publications (2)

Publication Number Publication Date
JP2010268306A true JP2010268306A (en) 2010-11-25
JP4883136B2 JP4883136B2 (en) 2012-02-22

Family

ID=42334883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009119027A Active JP4883136B2 (en) 2009-05-15 2009-05-15 Coil antenna

Country Status (3)

Country Link
JP (1) JP4883136B2 (en)
CN (1) CN101888021B (en)
GB (1) GB2470299B (en)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012091108A1 (en) * 2010-12-28 2012-07-05 ソニーケミカル&インフォメーションデバイス株式会社 Antenna module, communication device and method of manufacturing antenna module
WO2012141070A1 (en) * 2011-04-13 2012-10-18 株式会社村田製作所 Wireless ic device and wireless communication terminal
US8757502B2 (en) 2011-02-28 2014-06-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8770489B2 (en) 2011-07-15 2014-07-08 Murata Manufacturing Co., Ltd. Radio communication device
US8797225B2 (en) 2011-03-08 2014-08-05 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US8797148B2 (en) 2008-03-03 2014-08-05 Murata Manufacturing Co., Ltd. Radio frequency IC device and radio communication system
US8814056B2 (en) 2011-07-19 2014-08-26 Murata Manufacturing Co., Ltd. Antenna device, RFID tag, and communication terminal apparatus
US8853549B2 (en) 2009-09-30 2014-10-07 Murata Manufacturing Co., Ltd. Circuit substrate and method of manufacturing same
US8876010B2 (en) 2009-04-14 2014-11-04 Murata Manufacturing Co., Ltd Wireless IC device component and wireless IC device
US8905296B2 (en) 2011-12-01 2014-12-09 Murata Manufacturing Co., Ltd. Wireless integrated circuit device and method of manufacturing the same
US8917211B2 (en) 2008-11-17 2014-12-23 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8976075B2 (en) 2009-04-21 2015-03-10 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US8973841B2 (en) 2008-05-21 2015-03-10 Murata Manufacturing Co., Ltd. Wireless IC device
US9024725B2 (en) 2009-11-04 2015-05-05 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US9024837B2 (en) 2010-03-31 2015-05-05 Murata Manufacturing Co., Ltd. Antenna and wireless communication device
US9117157B2 (en) 2009-10-02 2015-08-25 Murata Manufacturing Co., Ltd. Wireless IC device and electromagnetic coupling module
US9219301B2 (en) 2010-12-24 2015-12-22 Murata Manufacturing Co., Ltd. Antenna device, battery pack with antenna, and communication terminal device
US9281873B2 (en) 2008-05-26 2016-03-08 Murata Manufacturing Co., Ltd. Wireless IC device system and method of determining authenticity of wireless IC device
US9378452B2 (en) 2011-05-16 2016-06-28 Murata Manufacturing Co., Ltd. Radio IC device
US9543642B2 (en) 2011-09-09 2017-01-10 Murata Manufacturing Co., Ltd. Antenna device and wireless device
US9558384B2 (en) 2010-07-28 2017-01-31 Murata Manufacturing Co., Ltd. Antenna apparatus and communication terminal instrument
US9692128B2 (en) 2012-02-24 2017-06-27 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device
US9727765B2 (en) 2010-03-24 2017-08-08 Murata Manufacturing Co., Ltd. RFID system including a reader/writer and RFID tag
KR101812782B1 (en) 2016-12-23 2017-12-27 주식회사 알에프텍 Antenna and mobile terminal apparatus having the same
US10013650B2 (en) 2010-03-03 2018-07-03 Murata Manufacturing Co., Ltd. Wireless communication module and wireless communication device
US10235544B2 (en) 2012-04-13 2019-03-19 Murata Manufacturing Co., Ltd. Inspection method and inspection device for RFID tag

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103518289B (en) * 2011-09-09 2016-01-20 株式会社村田制作所 Antenna assembly and communication terminal
DE102013104059A1 (en) 2013-04-22 2014-10-23 Infineon Technologies Ag Antenna arrangement, communication device and antenna structure
CN204809410U (en) 2013-08-13 2015-11-25 株式会社村田制作所 Antenna device , card formula device and electronic equipment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3896965B2 (en) * 2002-01-17 2007-03-22 三菱マテリアル株式会社 Reader / writer antenna and reader / writer equipped with the antenna
JP3975918B2 (en) * 2002-09-27 2007-09-12 ソニー株式会社 Antenna device
WO2005053095A1 (en) * 2003-11-28 2005-06-09 Fujitsu Limited Information processing device having non-contact reader and/or writer and coil antenna for magnetic connection
JP4414940B2 (en) * 2005-06-14 2010-02-17 ソニーケミカル&インフォメーションデバイス株式会社 Antenna device and antenna device adjusting method
JP4367717B2 (en) * 2007-03-26 2009-11-18 ソニー・エリクソン・モバイルコミュニケーションズ株式会社 Near field communication antenna and portable device
WO2009078214A1 (en) * 2007-12-18 2009-06-25 Murata Manufacturing Co., Ltd. Magnetic material antenna and antenna device
CN101447603A (en) * 2008-12-19 2009-06-03 上海集成电路研发中心有限公司 Antenna with progressive structure on RFID chip
JP4752909B2 (en) * 2008-12-24 2011-08-17 株式会社村田製作所 Magnetic material antenna and antenna device

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8797148B2 (en) 2008-03-03 2014-08-05 Murata Manufacturing Co., Ltd. Radio frequency IC device and radio communication system
US9022295B2 (en) 2008-05-21 2015-05-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8973841B2 (en) 2008-05-21 2015-03-10 Murata Manufacturing Co., Ltd. Wireless IC device
US9281873B2 (en) 2008-05-26 2016-03-08 Murata Manufacturing Co., Ltd. Wireless IC device system and method of determining authenticity of wireless IC device
US8917211B2 (en) 2008-11-17 2014-12-23 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8876010B2 (en) 2009-04-14 2014-11-04 Murata Manufacturing Co., Ltd Wireless IC device component and wireless IC device
US8976075B2 (en) 2009-04-21 2015-03-10 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US8853549B2 (en) 2009-09-30 2014-10-07 Murata Manufacturing Co., Ltd. Circuit substrate and method of manufacturing same
US9117157B2 (en) 2009-10-02 2015-08-25 Murata Manufacturing Co., Ltd. Wireless IC device and electromagnetic coupling module
US9024725B2 (en) 2009-11-04 2015-05-05 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US10013650B2 (en) 2010-03-03 2018-07-03 Murata Manufacturing Co., Ltd. Wireless communication module and wireless communication device
US9727765B2 (en) 2010-03-24 2017-08-08 Murata Manufacturing Co., Ltd. RFID system including a reader/writer and RFID tag
US9024837B2 (en) 2010-03-31 2015-05-05 Murata Manufacturing Co., Ltd. Antenna and wireless communication device
US9558384B2 (en) 2010-07-28 2017-01-31 Murata Manufacturing Co., Ltd. Antenna apparatus and communication terminal instrument
US9219301B2 (en) 2010-12-24 2015-12-22 Murata Manufacturing Co., Ltd. Antenna device, battery pack with antenna, and communication terminal device
TWI568072B (en) * 2010-12-28 2017-01-21 Dexerials Corp Antenna module, communication device and antenna module manufacturing method
US9627128B2 (en) 2010-12-28 2017-04-18 Dexerials Corporation Antenna module, communication device and method of manufacturing antenna module
JP2012151836A (en) * 2010-12-28 2012-08-09 Sony Chemical & Information Device Corp Antenna module, communication device, and method of manufacturing antenna module
WO2012091108A1 (en) * 2010-12-28 2012-07-05 ソニーケミカル&インフォメーションデバイス株式会社 Antenna module, communication device and method of manufacturing antenna module
US8757502B2 (en) 2011-02-28 2014-06-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8960561B2 (en) 2011-02-28 2015-02-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8797225B2 (en) 2011-03-08 2014-08-05 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US8740093B2 (en) 2011-04-13 2014-06-03 Murata Manufacturing Co., Ltd. Radio IC device and radio communication terminal
JP5482964B2 (en) * 2011-04-13 2014-05-07 株式会社村田製作所 Wireless IC device and wireless communication terminal
WO2012141070A1 (en) * 2011-04-13 2012-10-18 株式会社村田製作所 Wireless ic device and wireless communication terminal
US9378452B2 (en) 2011-05-16 2016-06-28 Murata Manufacturing Co., Ltd. Radio IC device
US8770489B2 (en) 2011-07-15 2014-07-08 Murata Manufacturing Co., Ltd. Radio communication device
US8814056B2 (en) 2011-07-19 2014-08-26 Murata Manufacturing Co., Ltd. Antenna device, RFID tag, and communication terminal apparatus
US9543642B2 (en) 2011-09-09 2017-01-10 Murata Manufacturing Co., Ltd. Antenna device and wireless device
US8905296B2 (en) 2011-12-01 2014-12-09 Murata Manufacturing Co., Ltd. Wireless integrated circuit device and method of manufacturing the same
US9692128B2 (en) 2012-02-24 2017-06-27 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device
US10235544B2 (en) 2012-04-13 2019-03-19 Murata Manufacturing Co., Ltd. Inspection method and inspection device for RFID tag
KR101812782B1 (en) 2016-12-23 2017-12-27 주식회사 알에프텍 Antenna and mobile terminal apparatus having the same

Also Published As

Publication number Publication date
GB2470299B (en) 2011-10-26
GB201008206D0 (en) 2010-06-30
JP4883136B2 (en) 2012-02-22
GB2470299A (en) 2010-11-17
CN101888021B (en) 2014-03-12
CN101888021A (en) 2010-11-17

Similar Documents

Publication Publication Date Title
US9997952B2 (en) Wireless charging module and mobile terminal including the same
CN101578736B (en) Wireless ic device
JP4788850B2 (en) Antenna module
US6367143B1 (en) Coil element and method for manufacturing thereof
JP4404166B2 (en) Wireless IC device
CN102273012B (en) Wireless IC device, wireless IC module and wireless IC module manufacturing method
US9825365B2 (en) Antenna device and communication terminal apparatus
FI119010B (en) RFID antenna
JP5510475B2 (en) Magnetic material antenna and antenna device
KR100881910B1 (en) Antenna coil to be mounted on a circuit board and antenna device
CN103427153B (en) Antenna assembly and radio communication device
EP2568417A2 (en) Antenna device and method of setting resonant frequency of antenna device
CN102414916B (en) Antenna device and handheld terminal
JP6311779B2 (en) Antenna device and electronic device
JP2008035464A (en) Portable electronic device
JP4325621B2 (en) Reader / writer and mobile communication device
JP5018918B2 (en) Antenna device and portable terminal device using the same
KR101132460B1 (en) Antenna device
US8718727B2 (en) Antenna having structure for multi-angled reception and mobile terminal including the antenna
JP2008092131A (en) Antenna element and mobile information terminal
CN101859923B (en) antenna
US8231061B2 (en) Contactless device with miniaturized antenna
KR101701552B1 (en) Antenna device and communication device
JP5757345B2 (en) wireless communication device
JP5532191B1 (en) Antenna device and communication terminal device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100914

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20100921

A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20101019

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110118

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110315

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110628

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110826

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111108

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111121

R150 Certificate of patent or registration of utility model

Ref document number: 4883136

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141216

Year of fee payment: 3