JPH057109A - Built-in antenna for portable telephone set - Google Patents
Built-in antenna for portable telephone setInfo
- Publication number
- JPH057109A JPH057109A JP15684791A JP15684791A JPH057109A JP H057109 A JPH057109 A JP H057109A JP 15684791 A JP15684791 A JP 15684791A JP 15684791 A JP15684791 A JP 15684791A JP H057109 A JPH057109 A JP H057109A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- mobile phone
- built
- printed circuit
- circuit board
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は携帯電話用内蔵アンテ
ナに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in antenna for mobile phones.
【０００２】[0002]
【従来の技術】図４は従来技術の線状アンテナを配設し
た携帯電話機の構成を示す図である。１は携帯電話機、
２はプリント基板、３はプリント基板２上に実装される
無線送受信機、４は整合回路、５は送信アンテナ、６は
受信アンテナである。無線送受信機３の出力は整合回路
４を経由して送信アンテナ５へ入り送信される。また、
受信アンテナ６が受信した信号は整合回路４を経由して
無線送受信機３へ入る。送受信アンテナ５、６は使用す
る搬送波（以下キャリアという）の周波数により長さが
異なり、一般的には１／４λ（λ＝ｖ／ｆ ｖ：光速、
ｆ：キャリア周波数）とされている。2. Description of the Related Art FIG. 4 is a diagram showing a configuration of a mobile phone having a conventional linear antenna. 1 is a mobile phone,
Reference numeral 2 is a printed circuit board, 3 is a wireless transceiver mounted on the printed circuit board 2, 4 is a matching circuit, 5 is a transmitting antenna, and 6 is a receiving antenna. The output of the wireless transceiver 3 enters the transmission antenna 5 via the matching circuit 4 and is transmitted. Also,
The signal received by the receiving antenna 6 enters the wireless transceiver 3 via the matching circuit 4. The transmission / reception antennas 5 and 6 have different lengths depending on the frequency of a carrier wave (hereinafter referred to as a carrier) to be used, and generally 1 / 4λ (λ = v / f v: speed of light,
f: carrier frequency).
【０００３】次に動作について説明する。図４におい
て、プリント基板２には電源部、制御部および音声部な
どが組み込まれている。プリント基板２からの出力は無
線送受信機３内で、搬送波に変調されて整合回路４に入
る。整合回路４は送信アンテナ５と無線送受信機３との
インピーダンスマッチングをとるためのものであり、一
般的には図８に示すようにインダクタンスａとコンデン
サｂにより構成される。送信アンテナ５に加えられた搬
送波は送信アンテナ５により空間に放射される。基地局
側から送信された電波は受信アンテナ６により受信さ
れ、整合回路４を介して、無線送受信機３へ効率よく送
られる。無線送受信機３は受信した搬送波を復調してプ
リント基板２へ出力する。次に送受信アンテナ５、６に
ついて説明する。携帯電話機では形状的な問題から主に
１／４λの接地アンテナが用いられている。この接地ア
ンテナのアンテナ長ｌ［ｍ］や電圧・電流分布などを図
６に示す。この場合アンテナ長ｌが１／４λの時、アン
テナ基部において電流最大、電圧最小となっているた
め、直列共振状態となり、アンテナのインピーダンスは
抵抗分のみとなる。しかしながら実際の携帯電話機など
で使われている搬送波は送信側２５４ＭＨｚ（１／４λ
は０．２９５ｍ）、受信側３８０ＭＨｚ（１／４λは
０．１９７ｍ）であり、形状的に１／４λの長さのアン
テナを実装することは難しいため、図７に示すように大
体アンテナ長が１／４λ以下となるアンテナが主であ
り、この場合アンテナインピーダンスは容量性になるの
で、図８の整合回路のようにインダクタンスａを直列に
入れて補正する必要がある。Next, the operation will be described. In FIG. 4, the printed circuit board 2 has a power supply unit, a control unit, a sound unit, and the like incorporated therein. The output from the printed circuit board 2 is modulated into a carrier wave in the wireless transceiver 3 and enters the matching circuit 4. The matching circuit 4 is for impedance matching between the transmitting antenna 5 and the wireless transceiver 3, and is generally composed of an inductance a and a capacitor b as shown in FIG. The carrier wave applied to the transmitting antenna 5 is radiated into space by the transmitting antenna 5. The radio wave transmitted from the base station side is received by the receiving antenna 6 and efficiently transmitted to the wireless transceiver 3 via the matching circuit 4. The wireless transceiver 3 demodulates the received carrier wave and outputs it to the printed circuit board 2. Next, the transmitting / receiving antennas 5 and 6 will be described. In a mobile phone, a 1 / 4λ ground antenna is mainly used because of its shape. FIG. 6 shows the antenna length 1 [m] of this ground antenna and the voltage / current distribution. In this case, when the antenna length 1 is 1 / 4λ, the current is maximum and the voltage is minimum at the antenna base, so a series resonance state occurs, and the impedance of the antenna is only resistance. However, the carrier wave used in actual mobile phones is 254 MHz (1 / 4λ) on the transmission side.
Is 0.295 m) and the receiving side is 380 MHz (1/4 λ is 0.197 m), and it is difficult to mount an antenna having a length of 1/4 λ in terms of shape. Therefore, as shown in FIG. Most antennas are ¼ λ or less, and in this case the antenna impedance is capacitive, so it is necessary to insert an inductance a in series as in the matching circuit of FIG. 8 to correct.
【０００４】[0004]
【発明が解決しようとする課題】従来の携帯電話用内蔵
アンテナは以上のように構成されているので、インピー
ダンスマッチングをとるために整合回路を設けなければ
ならず、形状の自由度がなく配設できるポイントが決ま
ってしまい、量産性が悪いなどの問題点があった。Since the conventional built-in antenna for mobile phones is constructed as described above, a matching circuit must be provided for impedance matching, and the antenna can be arranged without any degree of freedom in shape. The point that can be done was decided, and there were problems such as poor mass productivity.
【０００５】この発明は上記のような問題点を解消する
ためになされたもので、小型の性能の良い携帯電話用内
蔵アンテナを得ることを目的とする。The present invention has been made in order to solve the above problems, and an object thereof is to obtain a small-sized built-in antenna for a mobile phone having good performance.
【０００６】[0006]
【課題を解決するための手段】この発明に係る携帯電話
用内蔵アンテナはフレキシブルプリント基板上に、スパ
イラル状もしくはジグザグ状に形成し、薄形化するとと
もに小型化して携帯電話用に形成したものである。A built-in antenna for a mobile phone according to the present invention is formed on a flexible printed circuit board in a spiral shape or a zigzag shape, and is thinned and downsized for a mobile phone. is there.
【０００７】[0007]
【作用】この発明における携帯電話用内蔵アンテナはフ
レキシブルプリント基板上に、スパイラル状もしくはジ
グザグ状に形成したので、放射効率が良くなり薄形化と
ともに形状の自由度も増し、小型化することができる。The built-in antenna for a mobile phone according to the present invention is formed in a spiral shape or a zigzag shape on a flexible printed circuit board, so that the radiation efficiency is improved, the thickness is reduced, the degree of freedom in shape is increased, and the size can be reduced. .
【０００８】[0008]
【実施例】実施例１．以下、この発明の一実施例を図に
ついて説明する。図１において、１は携帯電話機（主に
コードレス電話機）、２はプリント基板、３はプリント
基板２に実装されている無線送受信機、５は送信アンテ
ナ、６は受信アンテナ、７は無線送受信機３と送受信ア
ンテナ５、６を接続するための中継基板である。図２は
一例として送信アンテナ５の導体パターン図である。こ
の導体パターンはパターン幅を３５μｍの銅箔で作り、
その周囲を２５μｍのポリイミドで包んで絶縁し、プリ
ント基板の厚さを１００μｍ以下とする。EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a mobile phone (mainly a cordless phone), 2 is a printed circuit board, 3 is a wireless transceiver mounted on the printed circuit board 5, 5 is a transmitting antenna, 6 is a receiving antenna, and 7 is a wireless transceiver 3. Is a relay board for connecting the transmitting and receiving antennas 5 and 6. FIG. 2 is a conductor pattern diagram of the transmitting antenna 5 as an example. This conductor pattern is made of copper foil with a pattern width of 35 μm,
The periphery thereof is wrapped with 25 μm of polyimide for insulation, and the thickness of the printed board is set to 100 μm or less.
【０００９】次に動作について説明する。電気的な信号
の流れについては従来技術と同様であるため、ここでは
説明を省略する。図２において、導体長は導体をスパイ
ラル状に形成することにより目標とする携帯電話機（コ
ードレス電話機）の搬送波（２５４ＭＨｚ）の１／４λ
（０．２９５ｍ）をとっている。また一番問題となる導
体パターンを囲むフレキシブル材料の誘電正接（以下ｔ
ａｎδという）といわれる損失に関するファクターであ
るが、絶縁材料であるポリイミドは高周波特性に優れて
いて殆ど問題にならず、導体と絶縁材料を接着する接着
材の特性も一般に１ＧＨｚ位までの高周波で使われてい
るプリント基板であるガラスエポキシ基板と殆ど変らな
い。かつ厚さが１００μｍ以下と非常に薄くなるため、
この部分での損失は少ないと考えられる。また携帯電話
機などに使用されるアンテナの帯域幅はある程度広いこ
とが望まれるが、この帯域幅を広くするためには一般的
に線状アンテナの径を太くすることにより実現できると
されているが、従来の線状アンテナでは径もある程度限
られていた。これに対しこの発明のアンテナでは導体を
スパイラル状に形成することにより、図４に示すように
等価的にアンテナの径を太くする働きがあり、前述のよ
うにアンテナの帯域幅を広くとることができる。人体の
影響を受けにくく、送受信電波の干渉を受けにくい様に
するために、送受信用アンテナを各々分離して、携帯電
話機の先端部側面に配設している。Next, the operation will be described. The electrical signal flow is the same as that of the conventional technique, and therefore its description is omitted here. In FIG. 2, the conductor length is 1 / 4λ of the carrier wave (254 MHz) of the target mobile phone (cordless phone) by forming the conductor in a spiral shape.
(0.295m). Also, the dielectric loss tangent (hereinafter t
It is a factor related to loss, which is called an δ), but polyimide, which is an insulating material, has excellent high-frequency characteristics and causes almost no problem. The characteristics of the adhesive that bonds the conductor and the insulating material are generally used at high frequencies up to about 1 GHz. It is almost the same as the glass epoxy board which is a known printed board. And since the thickness is very thin, 100 μm or less,
It is considered that the loss in this part is small. Further, it is desired that the bandwidth of an antenna used for a mobile phone or the like be wide to some extent, but it is generally said that it is possible to increase the bandwidth by increasing the diameter of the linear antenna. The diameter of the conventional linear antenna is limited to some extent. On the other hand, in the antenna of the present invention, by forming the conductor in a spiral shape, the diameter of the antenna is equivalently increased as shown in FIG. 4, and the antenna bandwidth can be widened as described above. it can. In order to reduce the influence of the human body and the interference of transmitted / received radio waves, the transmitting / receiving antennas are separated from each other and arranged on the side surface of the tip of the mobile phone.
【００１０】実施例２．アンテナの形状は実装される機
器により自由であり、アンテナの広帯域化を図るために
アンテナ導体を図３に示すようにジグザグ状に形成する
ことによってもアンテナの広帯域化を図ることができ
る。Embodiment 2. The shape of the antenna is free depending on the equipment to be mounted, and the antenna can be widened by forming the antenna conductor in a zigzag shape as shown in FIG. 3 in order to widen the antenna.
【００１１】[0011]
【発明の効果】以上のように、この発明によればアンテ
ナをフレキシブルプリント基板上にスパイラル状もしく
はジグザグ状に形成しているので、広帯域化が図れて放
射効率の良い携帯電話用内蔵アンテナを得ることができ
る。As described above, according to the present invention, since the antenna is formed on the flexible printed circuit board in a spiral shape or a zigzag shape, a wide band can be achieved and a built-in antenna for a mobile phone having good radiation efficiency can be obtained. be able to.
【図１】本発明のアンテナを内蔵した携帯電話機の構成
図である。FIG. 1 is a configuration diagram of a mobile phone incorporating an antenna of the present invention.
【図２】本発明のアンテナの導体パターン図である。FIG. 2 is a conductor pattern diagram of the antenna of the present invention.
【図３】本発明のアンテナの導体パターン図である。FIG. 3 is a conductor pattern diagram of the antenna of the present invention.
【図４】本発明のアンテナの説明図である。FIG. 4 is an explanatory diagram of an antenna of the present invention.
【図５】従来のアンテナを内蔵した携帯電話機の構成図
である。FIG. 5 is a configuration diagram of a mobile phone including a conventional antenna.
【図６】１／４λ長アンテナの電流・電圧分布である。FIG. 6 is a current / voltage distribution of a 1 / 4λ long antenna.
【図７】１／４λ以下長アンテナの電流・電圧分布であ
る。FIG. 7 is a current / voltage distribution of an antenna with a length of ¼λ or less.
【図８】容量性アンテナの整合回路である。FIG. 8 is a matching circuit for a capacitive antenna.
１ 携帯電話機 ２ プリント基板 ３ 無線送受信機 ４ 整合回路 ５ 送信アンテナ ６ 受信アンテナ ７ 中継基板 1 Mobile Phone 2 Printed Circuit Board 3 Radio Transceiver 4 Matching Circuit 5 Transmitting Antenna 6 Receiving Antenna 7 Relay Board
Claims (1)
形状で先端側から終端側に配設し、前記携帯電話機に内
蔵したフレキシブルプリント基板と、前記フレキシブル
プリント基板上に前記基板形状に沿って幅方向に分布さ
せたスパイラル状もしくはジグザグ状にパターンを形成
させたアンテナ導体とを具備した携帯電話用内蔵アンテ
ナ。 （２） アンテナ導体周辺をポリイミドで絶縁した特許
請求の範囲第１項記載の携帯電話用内蔵アンテナ。Claims: (1) A flexible printed circuit board having a width near the side surface of a mobile phone, the flexible printed circuit board being installed in the mobile phone from the front end side to the end side, and the flexible printed circuit board. A built-in antenna for a mobile phone, comprising: an antenna conductor having a spiral or zigzag pattern formed thereon and distributed in the width direction along the substrate shape. (2) The built-in antenna for a mobile phone according to claim 1, wherein the periphery of the antenna conductor is insulated with polyimide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3156847A JP2653277B2 (en) | 1991-06-27 | 1991-06-27 | Portable wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3156847A JP2653277B2 (en) | 1991-06-27 | 1991-06-27 | Portable wireless communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH057109A true JPH057109A (en) | 1993-01-14 |
| JP2653277B2 JP2653277B2 (en) | 1997-09-17 |
Family
ID=15636676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3156847A Expired - Lifetime JP2653277B2 (en) | 1991-06-27 | 1991-06-27 | Portable wireless communication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2653277B2 (en) |
Cited By (36)
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|---|---|---|---|---|
| EP0616383A1 (en) * | 1993-03-19 | 1994-09-21 | Ascom Business Systems Ag | Antenna device for hand-held portable transceivers |
| EP0938158A2 (en) * | 1998-02-20 | 1999-08-25 | Nokia Mobile Phones Ltd. | Antenna |
| WO1999043039A1 (en) * | 1998-02-20 | 1999-08-26 | Qualcomm Incorporated | Substrate antenna |
| EP0814536A3 (en) * | 1996-06-20 | 1999-10-13 | Kabushiki Kaisha Yokowo | Antenna and radio apparatus using same |
| WO2000001028A1 (en) * | 1998-06-26 | 2000-01-06 | Research In Motion Limited | Dual embedded antenna for an rf data communications device |
| WO2000003453A1 (en) * | 1998-07-09 | 2000-01-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Miniature printed spiral antenna for mobile terminals |
| US6097339A (en) * | 1998-02-23 | 2000-08-01 | Qualcomm Incorporated | Substrate antenna |
| FR2802709A1 (en) * | 1999-12-15 | 2001-06-22 | Canon Europa Nv | Communications equipment wire antenna shaping container unit having internal profiled container with curved inner wall and antenna end section pushed into shape during assembly. |
| EP1198027A1 (en) * | 2000-10-12 | 2002-04-17 | The Furukawa Electric Co., Ltd. | Small antenna |
| KR20020052161A (en) * | 2002-06-14 | 2002-07-02 | 박문식 | Antenna in a contactless card reader |
| US6515054B1 (en) | 1999-11-02 | 2003-02-04 | Nippon Shokubai Co., Ltd. | Biodegradable resin composition and its molded product |
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| GB2355116B (en) * | 1999-10-08 | 2003-10-08 | Nokia Mobile Phones Ltd | An antenna assembly and method of construction |
| US6664930B2 (en) | 2001-04-12 | 2003-12-16 | Research In Motion Limited | Multiple-element antenna |
| US6781548B2 (en) | 2000-04-05 | 2004-08-24 | Research In Motion Limited | Electrically connected multi-feed antenna system |
| US6791500B2 (en) | 2002-12-12 | 2004-09-14 | Research In Motion Limited | Antenna with near-field radiation control |
| US6812897B2 (en) | 2002-12-17 | 2004-11-02 | Research In Motion Limited | Dual mode antenna system for radio transceiver |
| US6876320B2 (en) | 2001-11-30 | 2005-04-05 | Fractus, S.A. | Anti-radar space-filling and/or multilevel chaff dispersers |
| US6891506B2 (en) | 2002-06-21 | 2005-05-10 | Research In Motion Limited | Multiple-element antenna with parasitic coupler |
| EP1593177A2 (en) * | 2003-01-17 | 2005-11-09 | The Insitu Group | Conductive structures including aircraft antennae and associated methods of formation |
| US6980173B2 (en) | 2003-07-24 | 2005-12-27 | Research In Motion Limited | Floating conductor pad for antenna performance stabilization and noise reduction |
| US7023387B2 (en) | 2003-05-14 | 2006-04-04 | Research In Motion Limited | Antenna with multiple-band patch and slot structures |
| US7148846B2 (en) | 2003-06-12 | 2006-12-12 | Research In Motion Limited | Multiple-element antenna with floating antenna element |
| US7183983B2 (en) | 2005-04-26 | 2007-02-27 | Nokia Corporation | Dual-layer antenna and method |
| US7245196B1 (en) | 2000-01-19 | 2007-07-17 | Fractus, S.A. | Fractal and space-filling transmission lines, resonators, filters and passive network elements |
| JP2007325147A (en) * | 2006-06-05 | 2007-12-13 | Hitachi Metals Ltd | Chip antenna, antenna device, and communication equipment |
| US7369089B2 (en) | 2004-05-13 | 2008-05-06 | Research In Motion Limited | Antenna with multiple-band patch and slot structures |
| EP2097946A1 (en) * | 2006-11-28 | 2009-09-09 | Pulse Finland Oy | Dielectric antenna |
| US7696935B2 (en) | 2004-06-02 | 2010-04-13 | Research In Motion Limited | Mobile wireless communications device comprising multi-frequency band antenna and related methods |
| WO2010073627A1 (en) | 2008-12-22 | 2010-07-01 | 株式会社フジクラ | Film antenna and method for manufacturing the same |
| US8472908B2 (en) | 2006-04-03 | 2013-06-25 | Fractus, S.A. | Wireless portable device including internal broadcast receiver |
| US9755314B2 (en) | 2001-10-16 | 2017-09-05 | Fractus S.A. | Loaded antenna |
| US9761934B2 (en) | 1999-09-20 | 2017-09-12 | Fractus, S.A. | Multilevel antennae |
| US9899727B2 (en) | 2006-07-18 | 2018-02-20 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
| US9905940B2 (en) | 1999-10-26 | 2018-02-27 | Fractus, S.A. | Interlaced multiband antenna arrays |
| US10355346B2 (en) | 2000-01-19 | 2019-07-16 | Fractus, S.A. | Space-filling miniature antennas |
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| Publication number | Publication date |
|---|---|
| JP2653277B2 (en) | 1997-09-17 |
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