WO2007013338A1 - Unité d'antenne et dispositif de communication portatif - Google Patents

Unité d'antenne et dispositif de communication portatif Download PDF

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Publication number
WO2007013338A1
WO2007013338A1 PCT/JP2006/314295 JP2006314295W WO2007013338A1 WO 2007013338 A1 WO2007013338 A1 WO 2007013338A1 JP 2006314295 W JP2006314295 W JP 2006314295W WO 2007013338 A1 WO2007013338 A1 WO 2007013338A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna unit
magnetic
communication
contact communication
Prior art date
Application number
PCT/JP2006/314295
Other languages
English (en)
Japanese (ja)
Inventor
Hajime Shimada
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2007013338A1 publication Critical patent/WO2007013338A1/fr

Links

Classifications

    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole
    • 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
    • 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
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant 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
    • H01Q9/27—Spiral antennas

Definitions

  • Antenna unit and portable communication device are antenna unit and portable communication device.
  • the present invention relates to an antenna unit that performs non-contact communication and a portable communication device equipped with the antenna unit.
  • proximity non-contact communication is performed with an external proximity non-contact communication device (hereinafter referred to as "external proximity non-contact communication device”) that is a counterpart when performing proximity non-contact communication.
  • external proximity non-contact communication device an external proximity non-contact communication device
  • portable communication devices that can be used have been studied.
  • the mobile phone 100 having the proximity non-contact communication function has a shape including a main casing 101 (of course, it may be foldable), and the main casing 101
  • a mobile phone antenna 102 for transmitting / receiving to / from a base station (not shown) and a proximity contactless communication antenna unit 200 for performing proximity contactless communication with an external proximity contactless communication device 300 are provided.
  • the above-mentioned external proximity non-contact communication device 300 which is a communication partner for performing proximity contactless communication with the mobile phone 100, is described above. Includes an antenna 301 for performing proximity contactless communication!
  • proximity contactless communication communication is normally performed using a magnetic field, and a loop antenna is generally used as an antenna for proximity contactless communication.
  • a loop antenna is generally used as an antenna for proximity contactless communication.
  • the communication distance characteristic of a loop antenna deteriorates during proximity non-contact communication if a metal plate or the like is present in the vicinity of the loop antenna that is easily affected by a conductive material.
  • the antenna unit 400 includes, for example, a technical force for arranging the magnetic body 403 on the back surface of the substrate 401 on which the loop antenna 402 is mounted on the surface. Has been. According to this technique, since the reflection of the magnetic field by the metal plate or the like is suppressed, the adverse effect caused by the metal plate or the like can be reduced.
  • Patent Document 1 Japanese Patent Laid-Open No. 7-46164
  • Patent Document 2 Japanese Patent Laid-Open No. 2002-319008
  • Patent Document 3 Japanese Patent Laid-Open No. 2001-319192
  • the magnetic material disposed on the back surface of the loop antenna it is easy to collect the magnetic flux in the loop antenna.
  • a magnetic material having a high relative permeability inductance component ( ⁇ a) is used.
  • this magnetic material has a characteristic that, when the inductance component ( ⁇ a) of the relative permeability is increased, the magnetic loss component b) of the relative permeability is increased.
  • the inductance component (a) of the relative magnetic permeability is excessively increased in the magnetic body disposed on the back surface of the loop antenna, the magnetic loss component (b) of the relative magnetic permeability is also increased.
  • the magnetic material and the loop antenna are combined to degrade the Q of the loop antenna, degrading the gain of the loop antenna.
  • the magnetic material disposed on the back surface of the loop antenna has a trade-off ratio.
  • the inductance component a) of the relative permeability is high to the extent that the gain of the loop antenna is not degraded while balancing the inductance component ( ⁇ a) of the permeability and the magnetic loss component ( ⁇ b) of the relative permeability. You have to choose something! /. For this reason, it is used in a state in which the gain of the loop antenna in the original free space is deteriorated.
  • the proximity non-contact communication antenna unit in order to secure a prescribed proximity non-contact communication distance, if the opening area of the proximity non-contact communication antenna is increased, the proximity non-contact communication antenna unit The size of the communication antenna will also increase. For this reason, the size of portable communication devices supporting near-contactless communication has also increased, and there has been a problem that design is impaired.
  • the present invention has been made to solve such a conventional problem, and can reduce the size of a non-contact communication antenna and improve the communication distance characteristics of non-contact communication. It is an object of the present invention to provide an antenna unit that can be used and a portable communication device equipped with the antenna unit.
  • the mobile communication device of the present invention uses two types of magnetic bodies having different relative magnetic permeability in the frequency band used for non-contact communication on a substrate provided with an antenna for non-contact communication. is there.
  • the proximity non-contact communication antenna unit installed in a portable communication device or the like for performing proximity non-contact communication with an external proximity non-contact communication device
  • the proximity of the proximity non-contact communication antenna inside the mobile communication device or the like Can reduce the effects of metals present in the network, such as electronic parts for mobile communication devices.
  • it is possible to reduce the deterioration of the communication distance characteristics of proximity contactless communication and it is possible to reduce the size of the antenna for proximity contactless communication.
  • the two types of magnetic bodies are arranged on a surface of the substrate opposite to a surface that performs non-contact communication.
  • the relative magnetic permeability is small! /
  • the other magnetic body is disposed on a surface opposite to the surface that performs non-contact communication of the substrate, and the two types of magnetic materials are disposed.
  • the magnetic body having a larger magnetic permeability is arranged on the surface of the substrate that performs the non-contact communication.
  • the magnetic material having a smaller relative permeability S is a metal-based magnetic material. And is provided on a portion of the substrate opposite to the surface on which the antenna is provided, and on a portion overlapping the antenna installation portion.
  • a portable communication device of the present invention has the antenna unit described above.
  • the present invention by laminating two kinds of magnetic bodies having different relative magnetic permeability in a frequency band used for non-contact communication on a substrate provided with an antenna for non-contact communication, It is possible to provide an antenna unit for proximity contactless communication that can secure a communication distance and at the same time reduce the size of the contactless communication antenna.
  • FIG. 1 is a side sectional view of an antenna unit according to an embodiment of the present invention.
  • FIG. 3 is an explanatory diagram showing a relative positional relationship between a mobile communication device provided with the antenna unit and an external proximity non-contact communication device communicating with the mobile communication device.
  • FIG. 4 is a side sectional view showing a modification of the antenna unit.
  • FIG. 5 is a side sectional view showing another modification of the antenna unit.
  • FIG. 6 is a side sectional view showing another modification of the antenna unit.
  • FIG. 7 is a side sectional view showing another modification of the antenna unit.
  • FIG. 8 is a side sectional view showing another modification of the antenna unit.
  • FIG. 9 is a side sectional view showing another modification of the antenna unit.
  • FIG. 10 is a side sectional view showing another modification of the antenna unit.
  • FIG. 11 is an explanatory diagram showing a relative positional relationship between a portable communication device provided with a conventional antenna unit and an external proximity non-contact communication device communicating with the portable communication device.
  • FIG. 12 is a side sectional view showing a conventional antenna unit.
  • FIG. 1 shows an antenna unit 1 for proximity contactless communication according to an embodiment of the present invention, and this antenna unit 1 is provided with a substrate (hereinafter referred to as “antenna substrate”) 2.
  • This one surface (hereinafter referred to as the front surface) 2A is provided with an antenna pattern 21 that constitutes an antenna for proximity contactless communication, and the surface opposite to the surface of this antenna substrate 2 (hereinafter referred to as the back surface) 2B
  • Two types of magnetic bodies, that is, a magnetic body 22 and a magnetic body 23 are provided.
  • the antenna pattern 21 functions as an antenna for proximity contactless communication as described above, and is generally used in this embodiment as shown in FIG. It consists of a loop antenna pattern.
  • the force described for antenna pattern 21 as 3 turns is not limited to the number of turns, and may be 3 turns or more and 3 turns or less.
  • the antenna pattern 21 may be spread over a plurality of layers.
  • the magnetic body 23 on the surface opposite to the installation surface of the antenna pattern 11 of the antenna substrate 2 is shown in a transparent state.
  • the magnetic body 22 is disposed on the back surface 2 B of the antenna substrate 2 at a position opposite to the antenna pattern 21, that is, at a position overlapping the antenna pattern 21.
  • the magnetic body 23 is formed on the back surface 2B of the antenna substrate 2 with the antenna pattern 21. It is installed in a part that does not overlap in position!
  • the magnetic body 22 and the magnetic body 23 have the following relationship.
  • the relationship of the magnetic loss component of the relative permeability is not an absolute condition compared to the relationship of the inductance component of the relative permeability of the magnetic body 22 and the magnetic body 23, so it is not specified here. To do.
  • the magnetic loss component (/ b) of the relative permeability is set so that the coupling with the antenna pattern 21 can be suppressed.
  • the magnetic body 22 is configured so that the inductance component a) of the relative permeability is maximized under the above-mentioned condition (1) (generally 5 or less).
  • Magnetic field reflection at the time of non-contact communication can be reduced and a large amount of magnetic flux can be collected.
  • the magnetic body 22 and the magnetic body 23 are arranged in the main casing 11 of the mobile communication device 10 shown in FIG. 3 as a part of the antenna unit 1 for proximity contactless communication.
  • Reduce the effects of mobile communication device 10 parts in body 11 (hereinafter referred to as “portable communication device parts”) on the characteristics of proximity contactless communication antennas (referring to magnetic field reflection and eddy current generation) It is possible to stabilize the communication distance characteristics during proximity non-contact communication.
  • the magnetic body 22 is generally made of a metallic magnetic body.
  • Table 1 the data actually obtained for two types of magnetic materials with a being 70 and 35 are as shown in Table 1 below.
  • the proximity non-contact communication distance difference is based on the use of the magnetic body 403 with / za of 35 in the configuration of FIG. 12, and the antennas 2 are all the same.
  • the embodiment of the present invention is the aspect (3) in Table 1 above, and the example generally used in the conventional implementation is the aspect (1). From the above results, the effect of the present invention can be understood.
  • the magnetic body 22 and the magnetic body 23 are arranged on the back surface 2B opposite to the front surface 2A for performing proximity contactless communication. Not limited to this!
  • the magnetic body 22 arranged at the overlapping position opposite to the antenna pattern 21 is close to the antenna substrate 2 in the same manner as the configuration shown in FIG. Arranged on the back side opposite to the non-contact communication surface (downward in Fig. 4), the magnetic body 23 arranged on the inner side of the antenna pattern 21 is the proximity non-contact communication surface side, that is, the front side of the antenna substrate 2 You can place it in the
  • the magnetic body 22 disposed on the lower surface of the antenna pattern 21 is opposite to the surface 2A that is a proximity non-contact communication surface with respect to the antenna substrate 2.
  • the magnetic body 23 disposed on the inner side of the antenna pattern 21 is disposed on the front surface 2A (proximity non-contact communication surface), and further the magnetic body 22 is placed under the antenna pattern
  • the antenna unit 1 in FIG. 1 may be configured to be arranged up to the area corresponding to the installation part of the magnetic body 23! .
  • the antenna substrate 1 is used as the antenna unit 1C. If the magnetic material 22 is placed in the position that overlaps the position opposite to the antenna pattern 21 on the back side, while the dimension T between the antenna pattern 21 and the antenna pattern 21 is at least lmm, the magnetic material 22 is placed on the inner side of the antenna pattern 21.
  • the magnetic body 23 may be disposed in a portion outside the antenna pattern 21.
  • the antenna unit may have a configuration as shown in FIGS.
  • the antenna The magnetic body 23 may be disposed outside the antenna pattern 21 on the surface of the substrate 2.
  • the antenna unit 1A shown in FIG. 8 may be arranged on the back surface of the antenna substrate 2 on the portion corresponding to the outside of the antenna pattern 21.
  • the magnetic body 23 may be disposed on the outer surface of the antenna substrate 2 outside the antenna pattern 21.
  • the dimension T between the antenna pattern 21 and the antenna unit 21 is equal to or more than lmm, as long as the antenna unit 1B shown in FIG.
  • the magnetic body 23 may be arranged on the back surface of the antenna substrate 2 on the portion corresponding to the outside of the antenna pattern 21.
  • the magnetic body constituting the proximity non-contact communication antenna unit is configured by the two types of magnetic bodies 22 and 23 having different relative magnetic permeability.
  • the antenna gain of the proximity contactless communication antenna unit 1 is improved, and the proximity contactless communication antenna unit 1 can be reduced in size, and the portable communication device 10 can be reduced in size.
  • the mobile communication device 10 of the present embodiment has two communication functions, a mobile phone function as a normal mobile phone and a proximity non-contact communication function as a mobile communication device.
  • the main body 11 is provided with an operation key, LCD, etc. (not shown).
  • the main body has a straight structure, but the present invention is not limited to this.
  • the main casing 11 includes a cellular phone antenna 12.
  • the cellular phone antenna 12 is an ordinary cellular phone antenna, and the cellular phone antenna 12 is configured to perform a call or data communication with a base station (not shown).
  • the main casing 11 also includes the antenna unit 1 for proximity contactless communication of the previous embodiment.
  • the antenna unit 1 for proximity non-contact communication is arranged as close as possible to the proximity non-contact communication surface (in the present embodiment, close to the top surface in the figure) in the main housing 11, Proximity contactless communication with the contactless communication antenna 301 of the contact communication device 300 is performed.
  • the external proximity non-contact communication device 300 has the same configuration as that shown in FIG. 11 in the “background art”, and has the proximity non-contact communication function 10 according to the present embodiment.
  • the external proximity non-contact communication device 300 is for proximity non-contact communication near the surface facing the mobile communication device 10 (the portion corresponding to the lower surface in FIG. 2). Install antenna 301!
  • proximity non-contact communication refers to communication using an electric field or a magnetic field as described in "Background Art".
  • magnetic force and electric force are It is a kind of force that follows Coulomb's law, and has the characteristic that it is inversely proportional to the square of the distance (follows the inverse square law), so the force decreases rapidly in the short range.
  • proximity non-contact communication in the present invention refers to communication that is established in a proximity region of approximately 10 cm or less where an electric field or magnetic field acts.
  • the antenna unit of the present invention is close to a portion that overlaps with the antenna on the surface opposite to the antenna mounting surface of the substrate, that is, a position that is opposite to the antenna and a portion that does not overlap with the antenna of the substrate.

Abstract

L'invention concerne une unité d'antenne pouvant être appliquée à un système de communication sans contact, selon laquelle les dimensions d'une antenne destinée à une communication sans contact peuvent être réduites et les caractéristiques de distance de communication de la communication sans contact peuvent être améliorées. Dans l'unité d'antenne (1), deux types de corps magnétiques (22, 23), présentant des perméabilités magnétiques relatives différentes dans une bande de fréquence utilisée pour la communication sans contact, sont empilés sur un substrat (2) après quoi on obtient un motif d'antenne (21), c'est-à-dire l'antenne destinée à une communication sans contact. Les deux types de corps magnétiques (22, 23) sont empilés sur un plan (2B) du substrat (2) opposé à un plan (2A) qui effectue une communication sans contact.
PCT/JP2006/314295 2005-07-29 2006-07-19 Unité d'antenne et dispositif de communication portatif WO2007013338A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-221537 2005-07-29
JP2005221537 2005-07-29

Publications (1)

Publication Number Publication Date
WO2007013338A1 true WO2007013338A1 (fr) 2007-02-01

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008219614A (ja) * 2007-03-06 2008-09-18 Sony Corp アンテナ装置および電子装置
JP2009055412A (ja) * 2007-08-28 2009-03-12 Tdk Corp 薄膜コイルを備えたアンテナ、アンテナシステム及びアンテナの製造方法
WO2010137605A1 (fr) * 2009-05-26 2010-12-02 アルプス電気株式会社 Dispositif de communication
WO2011078293A1 (fr) * 2009-12-24 2011-06-30 旭硝子株式会社 Étiquette rfid
WO2012111430A1 (fr) * 2011-02-15 2012-08-23 株式会社村田製作所 Dispositif d'antenne et dispositif formant terminal de communication
WO2013035820A1 (fr) * 2011-09-09 2013-03-14 株式会社村田製作所 Dispositif d'antenne, étiquette rfid et article métallique comprenant dispositif d'antenne
WO2013051684A1 (fr) * 2011-10-07 2013-04-11 株式会社村田製作所 Dispositif d'antenne et dispositif électronique
US8480228B2 (en) 2009-12-18 2013-07-09 Amo Groningen B.V. Limited echelette lens, systems and methods
JP2014132658A (ja) * 2013-01-04 2014-07-17 Lg Innotek Co Ltd 軟磁性層、これを含む受信アンテナ及び無線電力受信装置

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JPH0816745A (ja) * 1994-06-24 1996-01-19 Seiko Instr Inc Ｉｃカードシステム
JPH10145267A (ja) * 1996-09-13 1998-05-29 Hitachi Ltd 高効率アンテナコイル並びに無線カードおよび無線カードを用いた情報通信システム
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Cited By (17)

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Publication number Priority date Publication date Assignee Title
JP2008219614A (ja) * 2007-03-06 2008-09-18 Sony Corp アンテナ装置および電子装置
JP2009055412A (ja) * 2007-08-28 2009-03-12 Tdk Corp 薄膜コイルを備えたアンテナ、アンテナシステム及びアンテナの製造方法
WO2010137605A1 (fr) * 2009-05-26 2010-12-02 アルプス電気株式会社 Dispositif de communication
CN102414699A (zh) * 2009-05-26 2012-04-11 阿尔卑斯电气株式会社 通讯装置
US8480228B2 (en) 2009-12-18 2013-07-09 Amo Groningen B.V. Limited echelette lens, systems and methods
WO2011078293A1 (fr) * 2009-12-24 2011-06-30 旭硝子株式会社 Étiquette rfid
JP5472322B2 (ja) * 2009-12-24 2014-04-16 旭硝子株式会社 Ｒｆｉｄタグ
US9917366B2 (en) 2011-02-15 2018-03-13 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
WO2012111430A1 (fr) * 2011-02-15 2012-08-23 株式会社村田製作所 Dispositif d'antenne et dispositif formant terminal de communication
JP5131413B2 (ja) * 2011-02-15 2013-01-30 株式会社村田製作所 アンテナ装置および通信端末装置
KR101374302B1 (ko) 2011-02-15 2014-03-14 가부시키가이샤 무라타 세이사쿠쇼 안테나 장치 및 통신단말장치
WO2013035820A1 (fr) * 2011-09-09 2013-03-14 株式会社村田製作所 Dispositif d'antenne, étiquette rfid et article métallique comprenant dispositif d'antenne
WO2013051684A1 (fr) * 2011-10-07 2013-04-11 株式会社村田製作所 Dispositif d'antenne et dispositif électronique
US9577334B2 (en) 2011-10-07 2017-02-21 Murata Manufacturing Co., Ltd. Antenna device and electronic apparatus
CN107069191A (zh) * 2011-10-07 2017-08-18 株式会社村田制作所 天线装置及电子设备
CN107069191B (zh) * 2011-10-07 2019-10-18 株式会社村田制作所 天线装置及电子设备
JP2014132658A (ja) * 2013-01-04 2014-07-17 Lg Innotek Co Ltd 軟磁性層、これを含む受信アンテナ及び無線電力受信装置

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