WO2007013338A1 - Antenna unit and portable communication device - Google Patents

Antenna unit and portable communication device 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
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WO
WIPO (PCT)
Prior art keywords
antenna
antenna unit
magnetic
communication
contact communication
Prior art date
Application number
PCT/JP2006/314295
Other languages
French (fr)
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/en

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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.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

Provided is an antenna unit applicable to a noncontact communication system, by which the sizes of an antenna for noncontact communication can be reduced and communication distance characteristics of the noncontact communication can be improved. In the antenna unit (1), two types of magnetic bodies (22, 23) having different relative magnetic permeabilities in a frequency band used for the noncontact communication are stacked on a substrate (2) whereupon an antenna pattern (21), i.e. the antenna for noncontact communication, is provided. The two types of magnetic bodies (22, 23) are stacked on a plane (2B) of the substrate (2) opposite to a plane (2A) which performs noncontact communication.

Description

明 細 書  Specification
アンテナユニット及び携帯通信機器  Antenna unit and portable communication device
技術分野  Technical field
[0001] 本発明は、非接触通信を行うアンテナユニット及びこれを搭載した携帯通信機器に 関する。  The present invention relates to an antenna unit that performs non-contact communication and a portable communication device equipped with the antenna unit.
背景技術  Background art
[0002] 近時我々は、個人情報、例えば電話帳などのデータが記憶された電子データを携 帯電話機へ複写したり、病院や薬局などでの電子カルテの読取 ·書込や住民票 ·戸 籍などの電子化された住民台帳データの閲覧'請求などを行ったり、個人の趣味の データ (音楽や画像などの各種データ)を自己の携帯電話機などへ転送 ·複写 ·記憶 させたり、自動販売機などのプリペイド用として金額データを所望の電子機器へ読取 つて入力したり、或いは遊園地 ·駅などでの改札通過用のパスなどとして携帯電話を 使用することができる、換言すれば、通信相手を接触あるいは密着する程度まで近 接させて、具体的には電界或!ヽは磁界の作用する凡そ 1 Ocm以下程度の近接領域 において、電界或いは磁界を利用して通信を行う通信システム（以下、これを「近接 非接触通信システム」とよぶ）の開発要求が高まってきている。  [0002] Recently, we have copied electronic data in which personal information, such as data such as a telephone book, has been stored, to mobile phones, reading and writing electronic medical records at hospitals, pharmacies, etc. Browsing electronic resident register data such as registrants' requests, transferring personal hobby data (various data such as music and images) to your mobile phone, copying, storing, and vending You can read and enter the amount data into a desired electronic device for prepaid devices, etc., or you can use a mobile phone as a pass for passing a ticket gate at an amusement park or station, in other words, a communication partner In particular, a communication system (hereinafter referred to as a communication system) that uses an electric field or a magnetic field to communicate in an adjacent region of about 1 Ocm or less where an electric field or magnetic field acts. This Development requirements of the referred to as "proximity non-contact communication system") is increasing the.
[0003] このため、近接非接触通信を行うときの相手側となる外部の近接非接触通信機器（ 以下、「外部近接非接触通信機器」と略す)との間で近接非接触通信を行うことので きる携帯通信機器の開発が各種検討されている。  [0003] For this reason, 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. Various developments of portable communication devices that can be used have been studied.
[0004] このような近接非接触通信システムに対応した携帯通信機器の 1つとして、近接非 接触通信機能を付加した携帯電話機の開発が各種検討されている。  [0004] As one of mobile communication devices compatible with such a proximity contactless communication system, various developments of mobile phones to which a proximity contactless communication function is added have been studied.
[0005] 例えば図 11に示すように、この近接非接触通信機能を有する携帯電話機 100には 、メイン筐体 101を備えた形状 (勿論、折り畳み式でも構わない)であって、メイン筐体 101内部に図示外の基地局との送受信を行う携帯電話用アンテナ 102と、外部近接 非接触通信機器 300との間で近接非接触通信を行う近接非接触通信用アンテナュ ニット 200などを備えたものが各種提案されている。一方、この携帯電話機 100との 間で近接非接触通信を行う通信相手となる前述した外部近接非接触通信機器 300 には、近接非接触通信を行うためのアンテナ 301を備えて!/ヽる。 For example, as shown in FIG. 11, 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. Various proposals have been made. On the other hand, 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!
[0006] また近接非接触通信では、通常、磁界を利用して通信を行っており、近接非接触 通信用のアンテナとしては一般的にループアンテナを使用している。しかしながら、 ループアンテナは、導電性物質の影響を受け易ぐループアンテナの近傍に金属板 等が存在すると、近接非接触通信の際に通信距離特性が劣化することが知られてい る。 [0006] In 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. However, it is known that 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.
[0007] そこで、この近接する金属板等の影響を軽減するため、近接非接触通信に対応し た携帯通信機器の近接非接触通信用アンテナユニットの 1つとして、例えば図 12〖こ 示すような携帯通信機器用の近接非接触通信用アンテナユニット 400の開発が検討 されている。即ち、このアンテナユニット 400には、例えば、ループアンテナ 402を表 面に実装した基板 401において、その基板 401の背面に磁性体 403を配置する技 術力 例えば特許文献 1から特許文献 3等に記載されている。この技術によれば、金 属板等による磁界の反射を抑えるので、金属板等に起因する悪影響を軽減すること ができる。  [0007] Therefore, in order to reduce the influence of the adjacent metal plate or the like, as one of the proximity non-contact communication antenna units of the portable communication device corresponding to the proximity non-contact communication, for example, as shown in FIG. Development of an antenna unit 400 for proximity contactless communication for portable communication devices is under consideration. That is, 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.
特許文献 1：特開平 7— 46164号公報  Patent Document 1: Japanese Patent Laid-Open No. 7-46164
特許文献 2：特開 2002— 319008号公報  Patent Document 2: Japanese Patent Laid-Open No. 2002-319008
特許文献 3：特開 2001— 319192号公報  Patent Document 3: Japanese Patent Laid-Open No. 2001-319192
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0008] ところで、ループアンテナの背面に配置する磁性体としては、ループアンテナに磁 束を集めやす ヽ、換言すれば比透磁率のインダクタンス成分（ μ a)が高 ヽものを使 用している。し力しながら、一般的に、この磁性体は、比透磁率のインダクタンス成分 ( μ a)を高くすると比透磁率の磁気損失成分 b)も高くなるという特性がある。この ため、ループアンテナの背面に配置する磁性体において、比透磁率のインダクタンス 成分（ a)を高くしすぎると、比透磁率の磁気損失成分（ b)も高くなる。その結果、 磁性体とループアンテナが結合してループアンテナの Qが劣化し、ループアンテナ の利得を劣化させてしまう。  [0008] By the way, as the magnetic material disposed on the back surface of the loop antenna, it is easy to collect the magnetic flux in the loop antenna. In other words, a magnetic material having a high relative permeability inductance component (μa) is used. . However, in general, this magnetic material has a characteristic that, when the inductance component (μa) of the relative permeability is increased, the magnetic loss component b) of the relative permeability is increased. For this reason, if 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. As a result, the magnetic material and the loop antenna are combined to degrade the Q of the loop antenna, degrading the gain of the loop antenna.
[0009] 従って、ループアンテナの背面に配置する磁性体は、トレードオフの関係にある比 透磁率のインダクタンス成分（ μ a)と比透磁率の磁気損失成分（ μ b)とのバランスを とりながら、ループアンテナの利得を劣化させな 、程度で比透磁率のインダクタンス 成分 a)が高 、ものを選択せざるを得な!/、。このため、本来の自由空間上における ループアンテナの利得より劣化した状態で使用することになる。 [0009] Therefore, 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 (μa) of the permeability and the magnetic loss component (μb) 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.
[0010] このような事情から、近接非接触通信用アンテナユニットでは、規定の近接非接触 通信の通信距離を確保するため、近接非接触通信用アンテナの開口面積を増やす ようにすると、近接非接触通信用アンテナのサイズも大きくなつてしまう。このため、近 接非接触通信対応携帯通信機器のサイズも大きくなり、デザイン性が損なわれてしま うという問題も発生している。 [0010] For these reasons, in 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.
[0011] 本発明は、このような従来の問題を解決するためになされたものであり、非接触通 信用アンテナを小型化することができ、かつ非接触通信の通信距離特性の向上も図 ることができるアンテナユニット及びこのアンテナユニットを搭載した携帯通信機器を 提供することを目的とする。  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.
課題を解決するための手段  Means for solving the problem
[0012] 本発明の携帯通信機器は、非接触通信用のアンテナを設けた基板に、前記非接 触通信に使用する周波数帯域での比透磁率が異なる 2種類の磁性体を使用したも のである。この構成により、外部近接非接触通信機器と近接非接触通信を行うために 携帯通信機器などに搭載した近接非接触通信用のアンテナユニットにおいて、携帯 通信機器内部などの近接非接触通信用のアンテナ近傍に存在する金属、例えば携 帯通信機器用の電子部品等による影響を軽減することができる。その結果、近接非 接触通信の通信距離特性の劣化を軽減することができるとともに、近接非接触通信 用のアンテナの小型化を図ることができる。  [0012] 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. With this configuration, in 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. As a result, 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.
[0013] また、前記 2種類の磁性体は、前記基板の、非接触通信を行う面とは反対の面に配 置したものである。  [0013] Further, the two types of magnetic bodies are arranged on a surface of the substrate opposite to a surface that performs non-contact communication.
[0014] また、前記磁性体のうち、比透磁率が小さ!/、方の磁性体は、前記基板の非接触通 信を行う面とは反対の面に配置するとともに、前記 2種類の磁性体のうち、透磁率が 大き 、方の磁性体は、前記基板の前記非接触通信を行う面に配置したものである。  [0014] Further, of the magnetic bodies, the relative magnetic permeability is small! /, And 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. Among the bodies, the magnetic body having a larger magnetic permeability is arranged on the surface of the substrate that performs the non-contact communication.
[0015] また、前記 2種類の磁性体のうち、比透磁率力 S小さい方の磁性体は、金属系磁性 体で構成し、前記基板の前記アンテナを設けた一面とは反対の面で、前記アンテナ の設置部分と位置的に重なり合う部分に設けたものである。 [0015] Of the two types of magnetic materials, 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.
[0016] また、本発明の携帯通信機器は、上記に記載のアンテナユニットを有するものであ る。  [0016] A portable communication device of the present invention has the antenna unit described above.
発明の効果  The invention's effect
[0017] 本発明によれば、非接触通信用のアンテナを設けた基板に、非接触通信に使用す る周波数帯域での比透磁率が異なる 2種類の磁性体を積層することにより、所望の 通信距離を確保できるのと同時に非接触通信用アンテナの小型化を図ることができ る近接非接触通信用のアンテナユニットを提供できる。  [0017] According to 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.
図面の簡単な説明  Brief Description of Drawings
[0018] [図 1]本発明の実施形態に係るアンテナユニットの側断面図  FIG. 1 is a side sectional view of an antenna unit according to an embodiment of the present invention.
[図 2]そのアンテナユニットの概略平面図  [Figure 2] Schematic plan view of the antenna unit
[図 3]そのアンテナユニットを設けた携帯通信機器及びこれと通信する外部近接非接 触通信機器との相対位置関係を示す説明図  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.
[図 4]そのアンテナユニットの変形例を示す側断面図  FIG. 4 is a side sectional view showing a modification of the antenna unit.
[図 5]そのアンテナユニットの他の変形例を示す側断面図  FIG. 5 is a side sectional view showing another modification of the antenna unit.
[図 6]そのアンテナユニットの他の変形例を示す側断面図  FIG. 6 is a side sectional view showing another modification of the antenna unit.
[図 7]そのアンテナユニットの他の変形例を示す側断面図  FIG. 7 is a side sectional view showing another modification of the antenna unit.
[図 8]そのアンテナユニットの他の変形例を示す側断面図  FIG. 8 is a side sectional view showing another modification of the antenna unit.
[図 9]そのアンテナユニットの他の変形例を示す側断面図  FIG. 9 is a side sectional view showing another modification of the antenna unit.
[図 10]そのアンテナユニットの他の変形例を示す側断面図  FIG. 10 is a side sectional view showing another modification of the antenna unit.
[図 11]従来のアンテナユニットを設けた携帯通信機器及びこれと通信する外部近接 非接触通信機器との相対位置関係を示す説明図  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.
[図 12]従来のアンテナユニットを示す側断面図  FIG. 12 is a side sectional view showing a conventional antenna unit.
符号の説明  Explanation of symbols
[0019] 1 1A〜： LG アンテナユニット [0019] 1 1A ~: LG antenna unit
10 携帯通信機器  10 Mobile communication devices
11 メイン筐体 12 携帯電話用アンテナ 11 Main chassis 12 Mobile phone antenna
2 アンテナ基板 (基板）  2 Antenna board (board)
2A 表面  2A surface
2B 裏面  2B reverse side
21 アンテナパターン（アンテナ）  21 Antenna pattern (antenna)
22 磁性体 (比透磁率が小さい）  22 Magnetic material (low relative permeability)
23 磁性体 (比透磁率が大きい）  23 Magnetic material (high relative permeability)
300 外部近接非接触通信機器  300 External proximity non-contact communication equipment
T 近接非接触通信用アンテナパターンと磁性体との距離  T Distance between antenna pattern for proximity non-contact communication and magnetic material
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0020] 以下、本発明に係る実施の形態について、添付図面を参照しながら詳細に説明す る。 Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.
図 1は本発明の実施形態に係る近接非接触通信用のアンテナユニット 1を示すもの であり、このアンテナユニット 1には、基板 (以下、「アンテナ基板」とよぶ） 2を備えてお り、この一面（以下、表面とよぶ） 2Aには近接非接触通信用のアンテナを構成するァ ンテナパターン 21を設けているとともに、このアンテナ基板 2の表面とは反対面（以下 、裏面とよぶ） 2Bに 2種類の磁性体、つまり磁性体 22と磁性体 23とを設けている。  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.
[0021] このうち、アンテナパターン 21は、前述したように、近接非接触通信用のアンテナと して機能するものであり、本実施形態では、図 2に示すように、一般的に使用されるル ープアンテナのパターンで構成している。また、ここでは、アンテナパターン 21を 3タ ーンとして記載している力 このターン数に限るものではなぐ 3ターン以上でも 3ター ン以下でも構わないものとする。また、図 2ではアンテナパターン 21をアンテナ基板 2 の 1面で構成している力 アンテナ基板 2として複数の層からなる基板を使用する場 合は、複数の層に亙っていても構わない。なお、図 2では、アンテナ基板 2のアンテナ パターン 11の設置面とは反対面にある磁性体 23を透力した状態で示している。  Of these, 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. In addition, here, 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. In FIG. 2, when a substrate composed of a plurality of layers is used as the force antenna substrate 2 in which the antenna pattern 21 is formed on one surface of the antenna substrate 2, the antenna pattern 21 may be spread over a plurality of layers. In FIG. 2, 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.
[0022] 一方、磁性体 22は、アンテナ基板 2の裏面 2Bにおいて、アンテナパターン 21とは 正反対の位置、つまりアンテナパターン 21と位置的に重なり合う部分に設置されてい る。一方、磁性体 23は、アンテナ基板 2の裏面 2Bにおいて、アンテナパターン 21と 位置的に重なり合わな 、部分に設置されて!、る。 On the other hand, 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. On the other hand, 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!
[0023] ここで、磁性体 22と磁性体 23は、以下のような関係を有している。  Here, the magnetic body 22 and the magnetic body 23 have the following relationship.
μ a ^ μ a · · · l)  μ a ^ μ a ... l)
1 2  1 2
但し、 μ Ά；磁性体 22の比透磁率のインダクタンス成分  However, μ Ά; inductance component of relative permeability of magnetic body 22
1  1
；磁性体 23の比透磁率のインダクタンス成分  ; Inductance component of relative permeability of magnetic material 23
2  2
また、上記の（1)式より、一般的には以下の関係が成り立つ。  Further, from the above equation (1), the following relationship is generally established.
b < ;z b · · · (2)  b <; z b (2)
1 2  1 2
但し、 /z b；磁性体 22の比透磁率の磁気損失成分  However, / z b; magnetic loss component of relative permeability of magnetic body 22
1  1
b；磁性体 23の比透磁率の磁気損失成分  b: Magnetic loss component of relative permeability of magnetic body 23
2  2
しカゝしながら、比透磁率の磁気損失成分の関係は、この磁性体 22と磁性体 23の比 透磁率のインダクタンス成分の関係と比べ、絶対条件ではないため、ここでは特定し ないものとする。  However, 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.
[0024] これにより、アンテナパターン 21と重なり合う（磁性体 22に相当する）部分では、ァ ンテナパターン 21との結合を抑えることができる程度の比透磁率の磁気損失成分（ / b )に設定し (一般的には 5以下）、かつ前述の条件（1)の中で比透磁率のインダク タンス成分 a )が最大となるように、磁性体 22を構成している。  [0024] Thereby, in the portion that overlaps with the antenna pattern 21 (corresponding to the magnetic body 22), 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).
一方、アンテナパターン 21と位置的に重なり合わな 、 (磁性体 23に相当する）部分 では、図 1、図 2で示す間隔の寸法 Tが lmm以上を確保していれば、アンテナパター ン 21との結合は大きく軽減されるため、比透磁率の磁気損失成分 b )を気にする  On the other hand, in a portion (corresponding to the magnetic body 23) that does not overlap with the antenna pattern 21, if the distance T shown in FIG. 1 and FIG. Since the coupling is greatly reduced, the magnetic loss component b) of the relative permeability is a concern.
2  2
ことなぐ比透磁率のインダクタンス成分 a )が大きい磁性体 23とすることで、近接  By adopting a magnetic material 23 with a large inductance component a) of relative permeability,
2  2
非接触通信時の磁界の反射を減らし磁束を大きく集めることができる。  Magnetic field reflection at the time of non-contact communication can be reduced and a large amount of magnetic flux can be collected.
[0025] また、磁性体 22および磁性体 23は、近接非接触通信用のアンテナユニット 1の一 部として、図 3に示す携帯通信機器 10のメイン筐体 11内に配置したときに、メイン筐 体 11内にある携帯通信機器 10の部品（以下、「携帯通信機器部品」とよぶ)が近接 非接触通信アンテナの特性に及ぼす影響 (磁界の反射や渦電流発生等を指す)を 軽減することができ、近接非接触通信時の通信距離特性を安定させることができる。 また、磁性体 22は、携帯通信機器部品の影響を軽減するため、一般的には、金属 系磁性体を使用する。 ここで、実際に aが 70と 35の 2種の磁性体にて取得したデータは、以下の表 1の ようになる [0025] Further, 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. Moreover, in order to reduce the influence of mobile communication device parts, the magnetic body 22 is generally made of a metallic magnetic body. Here, the data actually obtained for two types of magnetic materials with a being 70 and 35 are as shown in Table 1 below.
[0026] [表 1] [0026] [Table 1]
Figure imgf000009_0001
Figure imgf000009_0001
[0027] なお、近接非接触通信距離の差は、図 12の構成で/ z aが 35の磁性体 403を使用 した時を基準としており、アンテナ 2は全て同一のものを使用している。また、本発明 の実施形態は、上記表 1の（3)の態様であり、従来の実施で一般的に使用されてい る例は、（1)の態様である。上記結果より、本発明の効果が分かる。  [0027] 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.
[0028] また、図 1のアンテナユニット 1では、アンテナ基板 2において、磁性体 22および磁 性体 23を、近接非接触通信を行う表面 2Aとは反対の裏面 2Bに配置している力 特 にこれに限定されるものではな!/、。  In the antenna unit 1 of FIG. 1, in the antenna substrate 2, 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!
[0029] 例えば、図 4に示すように、アンテナユニット 1Aとして、アンテナパターン 21とは正 反対の重なり合う位置に配置する磁性体 22は、アンテナ基板 2に対して図 1に示す 構成と同様に近接非接触通信面とは反対の裏面（図 4で下方向）に配置するが、アン テナパターン 21よりも内側に配置する磁性体 23は、近接非接触通信面側、つまりァ ンテナ基板 2の表側に配置しても構わな 、。  [0029] For example, as shown in FIG. 4, as the antenna unit 1A, 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
[0030] また、図 5に示すように、アンテナユニット 1Bとして、アンテナ基板 2に対して、アン テナパターン 21の下面に配置する磁性体 22を近接非接触通信面である表面 2Aと は反対に裏面 2B (図 5では下面）に配置するとともに、アンテナパターン 21よりも内 側に配置する磁性体 23を表面 2A (近接非接触通信面）に配置し、さらに磁性体 22 をアンテナパターン 21の下だけではなく、アンテナパターン 21よりも内側まで、つまり 図 1のアンテナユニット 1にお!/、て、磁性体 23の設置部分に対応する領域まで配置し た構成のものであっても構わな 、。  As shown in FIG. 5, as the antenna unit 1B, 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. Arranged on the rear surface 2B (the lower surface in FIG. 5), 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 In addition to the antenna pattern 21, that is, 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! .
[0031] また、図 6に示すように、アンテナユニット 1Cとして、アンテナ基板 2において、この 裏面側のアンテナパターン 21と正反対の位置的に重なり合う部分に磁性体 22を配 置する一方、アンテナパターン 21との間の寸法 Tが lmm以上確保されていれば、ァ ンテナパターン 21よりも内側およびアンテナパターン 21よりも外側の部分に、磁性体 23を配置しても構わない。 [0031] Further, as shown in FIG. 6, 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.
[0032] さらに、このアンテナユニットは、図 7乃至図 10に示すような構成でも構わない。 Furthermore, the antenna unit may have a configuration as shown in FIGS.
即ち、例えば図 7に示すアンテナユニット 1Dのように、図 4に示すアンテナユニット 1 Aと同様の構成のものにおいて、アンテナパターン 21との間の寸法 Tが lmm以上確 保されていれば、アンテナ基板 2の表面のアンテナパターン 21よりも外側部分に磁 性体 23を配置しても構わな 、。  That is, for example, in an antenna unit 1D shown in FIG. 7 having the same configuration as that of the antenna unit 1A shown in FIG. 4, if the dimension T between the antenna pattern 21 and the antenna pattern 21 is secured at least 1 mm, the antenna The magnetic body 23 may be disposed outside the antenna pattern 21 on the surface of the substrate 2.
また、図 8に示すアンテナユニット 1Eのように、図 4に示すアンテナユニット 1Aと同 様の構成のものにぉ 、て、アンテナパターン 21との間の寸法 Tが lmm以上確保され ていれば、アンテナ基板 2の裏面の、アンテナパターン 21よりも外側に相当する部分 にも磁性体 23を配置しても構わな 、。  In addition, as in the antenna unit 1E shown in FIG. 8, if the dimension T between the antenna pattern 21 and the antenna unit 21 is equal to or greater than 1 mm, the antenna unit 1A 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.
また、図 9に示すアンテナユニット 1Fのように、図 5に示すアンテナユニット 1Bと同 様の構成のものにぉ 、て、アンテナパターン 21との間の寸法 Tが lmm以上確保され ていれば、アンテナ基板 2の表面の、アンテナパターン 21よりも外側部分にも磁性体 23を配置しても構わない。  In addition, if the dimension T between the antenna pattern 21 and the antenna unit 1B shown in FIG. 9 is the same as that of the antenna unit 1B shown in FIG. The magnetic body 23 may be disposed on the outer surface of the antenna substrate 2 outside the antenna pattern 21.
また、図 10に示すアンテナユニット 1Eのように、図 5に示すアンテナユニット 1Bと同 様の構成のものにぉ 、て、アンテナパターン 21との間の寸法 Tが lmm以上確保され ていれば、アンテナ基板 2の裏面の、アンテナパターン 21よりも外側に相当する部分 にも磁性体 23を配置しても構わな 、。  In addition, as in the antenna unit 1E shown in FIG. 10, if 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.
[0033] このように、上記のような構成の本実施形態によれば、近接非接触通信用アンテナ ユニットを構成する磁性体を、比透磁率の異なる 2種類の磁性体 22、 23で構成する ことで、近接非接触通信用アンテナユニット 1のアンテナ利得が向上し、近接非接触 通信用アンテナユニット 1を小型化できるとともに、携帯通信機器 10を小型化できると いう利点を有する。 As described above, according to the present embodiment having the above-described configuration, 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. As a result, 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.
[0034] 次に、本発明の実施形態に係る近接非接触通信機能を有する携帯通信機器 10お よび外部近接非接触通信機器 300について、図面を参照しながら説明する。 本実施形態の携帯通信機器 10は、通常の携帯電話機としての携帯電話機能と、 携帯通信機器としての近接非接触通信機能との 2つの通信機能を有するものであり 、図 3に示すように、筐体部分が、図示外の操作キーや LCDなどを備えたメイン筐体 11 (本実施形態ではストレート状の構造を有しているが、本発明はこれに限定される ものではなぐ勿論、折り畳み形状でも構わない)からなる構造となっており、このメイ ン筐体 11には、携帯電話用アンテナ 12を備えている。この携帯電話用アンテナ 12 は、通常の携帯電話用のアンテナであって、この携帯電話用のアンテナ 12により、図 示外の基地局との間で通話もしくはデータ通信を行うようになっている。また、メイン 筐体 11には、先の実施形態の近接非接触通信用のアンテナユニット 1も備えている [0034] Next, the mobile communication device 10 and the external proximity non-contact communication device 300 having the proximity non-contact communication function according to the embodiment of the present invention will be described with reference to the drawings. 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. As shown in FIG. The main body 11 is provided with an operation key, LCD, etc. (not shown). (In this embodiment, 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.
[0035] この近接非接触通信用のアンテナユニット 1は、メイン筐体 11内部において、できる だけ近接非接触通信面寄り（本実施形態では同図において上面寄り）に配置されて おり、外部近接非接触通信機器 300の近接非接触通信用アンテナ 301との間で近 接非接触通信を行う。 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.
[0036] 一方、外部近接非接触通信機器 300は、「背景技術」において図 11で示したものと 同じ構成のものであって、近接非接触通信機能を有する本実施形態の携帯通信機 器 10との間で近接非接触通信を行うため、外部近接非接触通信機器 300の内部に は、携帯通信機器 10に対向する面 (図 2では下面に相当する部分)寄りに近接非接 触通信用アンテナ 301を設置して!/ヽる。  On the other hand, 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. In order to perform proximity non-contact communication with the mobile phone, 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!
[0037] なお、ここで、「近接非接触通信」とは、「背景技術」でも述べたように、電界或いは 磁界を利用して通信するものであり、周知のように、磁力および電気力は、クーロンの 法則に従う力の一種であって、距離の 2乗に反比例する（逆 2乗則に従う）といった特 徴を有するので、ショートレンジで急激にその力が減少する。このため、本発明での「 近接非接触通信」とは、電界或いは磁界の作用する専ら 10cm以下程度の近接領域 において成立する通信のことを指すものとする。  [0037] Here, "proximity non-contact communication" refers to communication using an electric field or a magnetic field as described in "Background Art". As is well known, 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. For this reason, “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.
[0038] なお、本発明は上述した実施形態に何ら限定されるものではなぐその要旨を逸脱 しな 、範囲にぉ 、て種々の形態で実施し得るものである。  Note that the present invention is not limited to the above-described embodiments, and can be carried out in various forms without departing from the gist thereof.
[0039] 本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲 を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明ら かである。 [0039] While the invention has been described in detail and with reference to specific embodiments, the spirit and scope of the invention It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the invention.
[0040] 本出願は、 2005年 7月 29日出願の日本特許出願 (特願 2005— 221537)に基づくも のであり、その内容はここに参照として取り込まれる。  [0040] This application is based on a Japanese patent application filed on July 29, 2005 (Japanese Patent Application No. 2005-221537), the contents of which are incorporated herein by reference.
産業上の利用可能性  Industrial applicability
[0041] 本発明のアンテナユニットは、基板のアンテナ設置面とは反対側の面においてその アンテナと重なり合う部分、つまりアンテナとは正反対の位置と、基板のアンテナとは 重なり合わない部分とに、近接非接触通信に使用する周波数帯域で比透磁率のイン ダクタンス成分 a)が異なる 2種類の磁性体を配置することにより、所望の通信距離 の確保と同時に小型化が実現でき、その結果、近接非接触通信用アンテナが小型 化できるようになり、近接非接触通信システムに対応した携帯通信機器等に有用で ある。 [0041] 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. By arranging two types of magnetic materials with different relative permeability inductance components a) in the frequency band used for non-contact communication, a desired communication distance can be secured and miniaturization can be realized. The contact communication antenna can be reduced in size, which is useful for portable communication devices that support proximity contactless communication systems.

Claims

請求の範囲 The scope of the claims
[1] 非接触通信用のアンテナを設けた基板に、前記非接触通信に使用する周波数帯 域での比透磁率が異なる 2種類の磁性体を使用したアンテナユニット。  [1] An antenna unit that 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.
[2] 前記 2種類の磁性体は、前記基板の非接触通信を行う面とは反対の面に配置した 請求項 1記載のアンテナユニット。 2. The antenna unit according to claim 1, wherein the two types of magnetic bodies are arranged on a surface opposite to a surface that performs non-contact communication of the substrate.
[3] 前記 2種類の磁性体のうち、比透磁率力小さい方の磁性体は、前記基板の非接触 通信を行う面とは反対の面に配置するとともに、 [3] Of the two types of magnetic bodies, the magnetic body having a smaller relative permeability is disposed on a surface opposite to the surface that performs non-contact communication of the substrate,
前記 2種類の磁性体のうち、比透磁率が大きい方の磁性体は、前記基板の前記非 接触通信を行う面に配置した請求項 1記載のアンテナユニット。  2. The antenna unit according to claim 1, wherein, of the two types of magnetic bodies, the magnetic body having a higher relative permeability is disposed on a surface of the substrate that performs the contactless communication.
[4] 前記 2種類の磁性体のうち、比透磁率力 S小さい方の磁性体は、金属系磁性体で構 成し、前記基板の前記アンテナを設けた一面とは反対の面で、前記アンテナの設置 部分と位置的に重なり合う部分に設けた請求項 1から 3のいずれ力 1項に記載のアン テナユニット。 [4] Of the two types of magnetic bodies, the magnetic body having a smaller relative permeability force S is composed of a metal-based magnetic body, and is a surface opposite to the one surface on which the antenna is provided on the substrate. The antenna unit according to any one of claims 1 to 3, wherein the antenna unit is provided in a portion that overlaps with an antenna installation portion.
[5] 請求項 1から 4の何れか 1項に記載のアンテナユニットを有する携帯通信機器。  [5] A mobile communication device having the antenna unit according to any one of claims 1 to 4.
PCT/JP2006/314295 2005-07-29 2006-07-19 Antenna unit and portable communication device WO2007013338A1 (en)

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