JPH09139621A - Built-in plane antenna - Google Patents

Built-in plane antenna

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Publication number
JPH09139621A
JPH09139621A JP29829695A JP29829695A JPH09139621A JP H09139621 A JPH09139621 A JP H09139621A JP 29829695 A JP29829695 A JP 29829695A JP 29829695 A JP29829695 A JP 29829695A JP H09139621 A JPH09139621 A JP H09139621A
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Patent type
Prior art keywords
antenna
board
terminal
built
plane
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Pending
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JP29829695A
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Japanese (ja)
Inventor
Shinichi Nakada
慎一 中田
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Kyocera Corp
京セラ株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a miniaturized and high-gain built-in plane antenna by horizontally holding a meandering antenna element electrically having a specified electric length at a certain height on the ground of a base board.
SOLUTION: Concerning an antenna to be built in the casing of portable radio equipment, this antenna is provided with a meandering antenna element 4 which is formed on the surface of a dielectric board 1 and has the electric length of 1/4 wavelength, and a means (strut) 3 for parallelly holding the dielectric board 1 at a fixed height from a base board 2 (including the circuit board), a power feeding point 7 is formed by defining one terminal of the meandering antenna element 4 as a power feeding terminal 5 and connecting it through a power feeding pin 8 to a feeder line 9 on the base board 2 almost just under that terminal 5, and the built-in plane antenna with the other terminal as a released terminal 6 is provided. In this case, concerning the plane antenna built in the casing of portable telephone, a slender conductor is formed on the surface of the dielectric board 1 while meandering so as to get the electric length of 1/4 wavelength to be resonated in a reception band for receiving radio waves transmitted from a base station.
COPYRIGHT: (C)1997,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、主としてデジタル方式の携帯電話機等に内蔵して使用される平面アンテナに関する。 The present invention relates to relates to planar antennas used built mainly in the mobile phone of the digital system.

【0002】 [0002]

【従来の技術】従来、平面アンテナは小型で高利得という利点により、デジタル方式の携帯電話の内蔵アンテナとして広く使われてきた。 Conventionally, planar antenna by virtue of high gain compact, has been widely used as a built-in antenna of the cellular phone digital. 近年、携帯電話市場は急速に普及し、小型化になる傾向がある。 In recent years, mobile phone market is spreading rapidly, there is a tendency to become miniaturization. 従って、携帯電話に搭載されているアンテナもより小型化が求められている。 Therefore, an antenna mounted on the portable phone even more miniaturization is required. 本発明は、内蔵して使用する平面アンテナの小型化に関するものである。 The present invention relates to the miniaturization of the planar antenna built and used.

【0003】内蔵アンテナに用いられている方式として、図4のように、逆Fアンテナ17やマイクロストリップラインアンテナ(図示せず)などがある。 As a method used in the built-in antenna, as shown in FIG. 4, and the like inverted F antenna 17 and a microstrip line antenna (not shown). これらのアンテナとして共通する点は、給電ピン8の給電手段と短絡導体18の短絡手段の2つを必要とすることである。 Common points as these antennas is that it requires two shorting means of the feeding means and the short-circuit conductor 18 of the feeding pin 8.

【0004】アンテナ単体で考えた場合、アンテナ素子を短絡することは、アンテナの大きさを小型にする効果があることは知られている。 [0004] When considering the antenna itself, shorting the antenna element, is known to the size of the antenna is effective to reduce the size. しかし、携帯無線機のシステム全体で考えて場合、短絡手段と給電手段の2つを設けることは、必ずしも小型化に効果があるとは言えない。 However, when you consider the entire portable radio system, the provision of two short-circuit means feeding means is not necessarily be effective in downsizing.

【0005】なぜならば、この2つの手段を実現するには、アンテナが搭載される回路基板上に、給電ライン(整合回路が必要な場合はそれも含む)と、さらにアンテナと回路基板上のグランド間を接続するためのランドや板金を必要とする。 [0005] This is because, in order to achieve these two means, on a circuit board on which the antenna is mounted, and the power supply line (if the matching circuit is required also includes it), further antenna and the circuit board ground require the land and sheet metal for connecting between. そのために、グランドを接続するための部品や工程の増加を招くことになる。 Therefore, it leads to an increase of parts and steps for connecting the ground. この結果、 As a result,
アンテナの配置や大きさに制約を受けることになる。 It will be subject to restrictions on the placement and size of the antenna.

【0006】ところが、給電手段のみを用いるアンテナとして、ヘリカルアンテナが挙げられるが、これを図3 [0006] However, as an antenna using only the power supply means, although the helical antenna and the like, which FIG. 3
のように、地板2に平行にヘリカルコイル16を倒して(筐体内に収めるため)内蔵アンテナとして用いても、 As described above, it is used as a parallel to defeat helical coil 16 to the main plate 2 (for fit in the housing) internal antenna of
倒すことによってアンテナ入力インピーダンスが低くなり整合を取るのが難しく、利得も悪い。 It is difficult antenna input impedance take it consistent low by that defeat, the gain is also bad.

【0007】 [0007]

【課題を解決するための手段】本発明は短絡手段を用いず、給電手段のみを用いるアンテナ方式であり、地板(グランド板あるいはグランド板を含む回路基板)のグランド上のある高さに電気的に1/4波長の長さがある蛇行状のアンテナ素子を水平に保持することにより小型かつ高利得な内蔵平面アンテナを得るものである。 The present invention SUMMARY OF] without using a short-circuiting means is an antenna system using only the power supply means, electrical ground on a height of the main plate (circuit board including a ground plate or ground plate) it is intended to obtain a compact and high-gain built-planar antenna by maintaining the meander-shaped antenna element with a length of 1/4 wavelength horizontally.

【0008】 [0008]

【発明の実施の形態】本発明の実施形態は、図1に示すように、携帯無線機の筐体に内蔵されるアンテナにおいて、誘電体基板1の面上に形成された1/4波長の電気的長さを有する蛇行状アンテナ素子4と、誘電体基板1 Embodiment of the embodiment of the present invention, as shown in FIG. 1, the antenna built in the housing of the portable radio, quarter wave formed on the surface of the dielectric substrate 1 a meandering antenna element 4 having an electrical length, the dielectric substrate 1
を地板2(回路基板15を含む)から一定の高さに平行に保持する手段(支柱3)とを具備し、蛇行状アンテナ素子4の一端を給電端5とし給電ピン8を通じ略真下の地板2上にて給電線9に接続して給電点7を形成し、他端を開放端6とする内蔵平面アンテナ11である。 Means for holding in parallel at a constant height from the main plate 2 (including the circuit board 15) comprises a (column 3) and, the base plate directly below substantially through the feeding pin 8 to the end of the meandering antenna element 4 and the feeding end 5 at the top 2 to connect the feed line 9 to form a feeding point 7, it is built flat antenna 11 to the other end an open end 6. また図2に示すように、この内蔵平面アンテナ11は、1/ Further, as shown in FIG. 2, the internal planar antenna 11, 1 /
4波長の蛇行状アンテナ素子4が、その一端である給電端5と他端の開放端6の配置を、給電点7を筺体内の中心側にして開放端6が携帯無線機の筺体12のケース1 4 meandering antenna element 4 wavelengths, the placement of the open end 6 of the feeding end 5 and the other end is one end, an open end 6 to the feeding point 7 to the center side in the housing is a housing 12 of the portable radio case 1
3間近になる形状に誘電体基板1上に形成する。 3 is formed on the dielectric substrate 1 to close the composed shape. また筐体12上部に誘電体基板1が配置される。 The dielectric substrate 1 is disposed in the housing 12 the top. さらに、外部に突出する線状アンテナ14と内蔵平面アンテナ11の間でダイバシチ受信を行うため、誘電体基板1は線状アンテナ14が配置されている場所から離して配置される。 Furthermore, in order to perform diversity reception between the linear antenna 14 and the built-planar antenna 11 which projects to the outside, the dielectric substrate 1 is disposed away from the place where the linear antenna 14 is arranged.

【0009】また、1/4波長の蛇行状のアンテナ素子4は誘電体基板1の地板側の面上に形成するかあるいは地板の反対側の面上に形成する。 [0009] 1/4 meander-like antenna element 4 of the wavelength is formed on the opposite surface of the or the base plate is formed on the surface of the ground plane of the dielectric substrate 1. さらに、誘電体基板1 Further, the dielectric substrate 1
及びその面上に形成された1/4波長の蛇行状のアンテナ素子4は、薄い板金を1/4波長の電気的長さがある蛇行状に打ち抜くことで代替できる。 And serpentine antenna element 4 quarter wave formed on the surface may be replaced by punching a thin metal plate in a meandering shape with the electrical length of a quarter wavelength. 上述の誘電体基板1あるいはこの薄い板金を打ち抜いたアンテナ素子は、 Antenna elements punched out above the dielectric substrate 1 or the thin sheet metal,
その保持を地板2からでなく筐体12のリア側ケースから保持手段により保持してもよい。 It may be held by the holding means that holds the rear side case of the housing 12 rather than from the main plate 2.

【0010】以下図面を用いて本発明の実施形態を説明する。 [0010] embodiments of the present invention will be described with reference to the drawings. 図1は本発明の平面アンテナの斜視図であり、図2は本発明の平面アンテナの配置図である。 Figure 1 is a perspective view of a planar antenna of the present invention, FIG 2 is a layout view of a planar antenna of the present invention.

【0011】図1において、1は誘電体基板であり、2 [0011] In FIG. 1, 1 is a dielectric substrate, 2
は通常回路基板などが用いられる地板であり、3は地板2からある一定の高さに平行に誘電体基板1を保持するようにする支柱であり、4は誘電体基板1の面上に銅箔印刷されたアンテナ素子であり、5はアンテナ素子4の給電側の端部である給電端であり、6はアンテナ素子4 A ground plate etc. Usually the circuit substrate is used, 3 are struts to hold the dielectric substrate 1 in parallel to a certain height from the base plate 2, the copper on the surface of the dielectric substrate 1 4 an antenna element that is foil printed, 5 is a power supply end is an end of the feeding side of the antenna element 4, 6 antenna element 4
の先端部分である開放端であり、7は地板上に形成された給電点であり、8は給電端5と給電点7を電気的に接続する給電ピンであり、9は地板2上に形成された給電点7から受信回路(図示せず)までを電気的に接続する給電線であり、10はアンテナと受信回路のインピーダンスの整合をとるための整合回路であり、11は誘電体基板1とアンテナ素子4と給電ピン8を合わせた平面アンテナである。 An open end is the tip portion of the 7 are feeding points formed on the base plate, 8 is a power supply pin for electrically connecting the power feeding point 7 and the feeding end 5, 9 formed on the main plate 2 a feed line which connects the feed point 7, which is to receive circuit (not shown) electrically, 10 are matching circuit for matching the impedance of the antenna and the receiving circuit, 11 is a dielectric substrate 1 that the planar antenna combined antenna element 4 and the feeding pin 8.

【0012】図2において、12はフロント側全面とリア側上半分を占める携帯電話本体ケースとリア側下半分を占める着脱式電池パックケースとで携帯電話の外観を構成する筐体であり、図はリア側の上部ケースの一部を切り欠いた状態を示す。 [0012] In FIG 2, 12 is a housing which constitutes an appearance of a mobile phone in the front side entirely and mobile phone main body case and detachable battery pack case, which accounts for the rear lower half which accounts for half on the rear side, FIG. shows a state in which cut away part of the rear side of the upper case. また、13はフロント側のケースであり、14は外部に突出している線状アンテナであり、15は平面アンテナ11の真下にある回路基板(地板)である。 Further, 13 is a front side case, 14 is a linear antenna which projects to the outside, 15 is a circuit board located beneath the planar antenna 11 (the ground plane).

【0013】このような構成のときに、携帯電話の筐体に内蔵されている平面アンテナ11は基地局から送信される電波を受信できるように、受信帯域で共振するような1/4波長の電気的長さをもつように、幅0.6mm [0013] When such a configuration, the planar antenna 11 incorporated in the chassis of the mobile phone to be able to receive radio waves transmitted from the base station, the 1/4 wavelength as to resonate at the reception band as with electrical length, width 0.6mm
〜1.0mmぐらいの細長い導体を蛇行状に誘電体基板1の面上に形成する。 An elongated conductor around ~1.0mm meanderingly formed on the surface of the dielectric substrate 1. 平面アンテナ11の真下にある回路基板15の平面アンテナ11に重なる部分はグランドがベタではられており、この部分とアンテナ素子4が共振を起こし、受信した電力が給電ピン8を流れ給電線9 Overlap the planar antenna 11 of the circuit board 15 directly below the planar antenna 11 are Hara ground in solid, this part and the antenna element 4 resonates, the power received by the flow feeding pin 8 feed line 9
を通って受信回路に流れる。 The flowing into the reception circuit through. このとき、平面アンテナ1 In this case, the planar antenna 1
1と地板2(回路基板15)を電気的に接続するものは、給電ピン8のみであり、短絡手段を回路基板15に設ける必要がなく、その分回路基板15のスペースを有効に利用できる。 1 and the base plate 2 (circuit board 15) and electrically connects is only feeding pin 8, there is no need to provide a short-circuit device to the circuit board 15 can be effectively utilized space correspondingly the circuit board 15.

【0014】また、共振周波数はアンテナ素子4の導体の周囲長で決まるが、幅の細い導体を図1,2のように蛇行状に這わせることによって、誘電体基板1のサイズを小さくすることができる。 Further, the resonance frequency is determined by the peripheral length of the conductor of the antenna element 4, by causing laid a thin conductor width in a meandering shape as shown in FIGS. 1 and 2, reducing the size of the dielectric substrate 1 can.

【0015】さらに、利得に関しては、地板2に対するアンテナ素子4の高さが高いほど利得が良くなる傾向にあり、図3のようにヘリカルコイルを横に寝かせたような構成にすると地板2からコイル素子の高さが範囲を持ち低い部分ができるために利得が劣化し、低い部分を高くしようとしてもコイルの上部がケースにつっかえてしまい利得が良くならないが、本発明のように誘電体基板1の面上にアンテナ素子4を印刷することにより、地板2(回路基板15)からの高さが一定となり、ぎりぎりまで高さをかせぐことができる。 Furthermore, with respect to the gain, they tend to gain higher height of the antenna element 4 is improved with respect to the main plate 2, the coil from the main plate 2 when the structure as laid helical coil laterally as shown in Fig. 3 gain deteriorates in order to be lower portion has a height of the element in the range, but the upper portion of the coil is not well gain will be jamming the case even if an attempt increase the low portion, the dielectric substrate 1 as in the present invention by printing the antenna element 4 on the surface of the main plate 2 becomes the height of the (circuit board 15) is constant, it is possible to earn the height up to the last minute.

【0016】以上の構成により、小型化が可能となり、 [0016] With the above configuration, it is possible to downsize,
かつ高利得も得ることができる。 And it can also high gain obtained.

【0017】また、図2のようにアンテナ素子4は給電端5を筐体内の中心側に配置し、電界が最大となる開放端6をケース13の間近に配置するように形成し、さらに、誘電体基板1は、アンテナ素子4の開放端6がケース13の、間近になるように配置することにより利得が向上する。 Further, the antenna element 4 as shown in FIG. 2 is arranged feeding end 5 to the center side of the housing, formed as an electric field to place the open end 6 that maximizes the close of the casing 13, further, the dielectric substrate 1, gain is improved by the open end 6 of the antenna element 4 is arranged so that the case 13 becomes close.

【0018】この配置する方向は、外部に突出する線状アンテナ14とのダイバシチ受信の効果を高めるために、誘電体基板1を線状アンテナ14から離して配置されるようにすると良い。 The direction of this arrangement, in order to enhance the effect of the diversity reception of the linear antenna 14 which projects to the outside, may be configured to be spaced apart a dielectric substrate 1 from the linear antenna 14.

【0019】また、本発明はアンテナ素子4を印刷する面上を誘電体基板1の地板側の面上に形成しても良いし、地板と反対の面上に形成しても良い。 Further, the present invention may be formed Menjo to print the antenna element 4 on the surface of the ground plane of the dielectric substrate 1 may be formed on the opposite surface and the ground plate.

【0020】誘電体基板1においても、その材料にこだわることはなく、薄い板金を1/4波長の電気的長さがある蛇行状のアンテナ素子になるように打ち抜いて平面アンテナとしても良い。 [0020] In the dielectric substrate 1, never stick to the material may be a planar antenna by punching a thin metal plate so as to meander-shaped antenna element has electrical length of a quarter wavelength.

【0021】誘電体基板1にしろ薄い板金にしろこれらの保持の方法は、地板2から支柱3を出して保持することにこだわることはなく、例えば、リア側ケースから平面アンテナを保持しても良い。 The dielectric how these holding white thin sheet metal white on the substrate 1 is not to stick to hold the base plate 2 out of column 3, for example, also holds the planar antenna from the rear side case good.

【0022】 [0022]

【実施例】一例として、800MHz帯のデジタル式携帯電話に本発明を使用したとすれば、その平面アンテナの大きさは、アンテナ素子の幅を0.6mmとして、2 As EXAMPLES An example, if using the present invention to a digital cellular phone of 800MHz band, the size of the planar antenna, the width of the antenna element as 0.6 mm, 2
5×15×5(横×縦×高さ:単位mm)程度になり、 5 × 15 × 5: becomes (width × length × height unit mm) degree,
従来の平面アンテナの約半分の大きさまで小型になる。 It becomes small to about half the size of the conventional planar antenna.
利得も従来の平面アンテナと同等以上を確保でき十分実用になる。 Gain can be ensured even more comparable to conventional planar antenna becomes sufficiently practical.

【0023】 [0023]

【発明の効果】小型化が容易で、充分な利得を確保できる。 Easy to miniaturize, according to the present invention, it can ensure a sufficient gain.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施形態である平面アンテナの斜視図。 Perspective view of a planar antenna according to an embodiment of the present invention; FIG.

【図2】本発明の実施形態である平面アンテナ配置を示すもので、(a)はリア側の上部ケースを切り欠いた携帯電話の背面図、(b)は同側面図。 [Figure 2] shows the planar antenna arrangement according to an embodiment of the present invention, (a) is a rear view of the mobile phone cut away the upper case of the rear side, (b) is a side view of the same.

【図3】内蔵アンテナとした場合のヘリカルアンテナ斜視図。 [3] the helical antenna perspective view of a case of a built-in antenna.

【図4】従来の平面アンテナ斜視図。 [4] Conventional planar antenna perspective view.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 誘電体基板 2 地板 3 支柱 4 アンテナ素子 5 給電端 6 開放端 7 給電点 8 給電ピン 9 給電線 10 整合回路 11 平面アンテナ 12 筐体 13 フロント側ケース 14 線状アンテナ 15 回路基板 16 ヘリカルアンテナ 17 逆Fアンテナ 18 短絡導体 First dielectric substrate 2 base plate 3 supports 4 antenna elements 5 feed end 6 open end 7 feeding point 8 feed pin 9 feed line 10 matching circuit 11 planar antenna 12 housing 13 the front side case 14 linear antenna 15 circuit board 16 helical antenna 17 F antenna 18 shorting conductors

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】携帯無線機の筐体に内蔵される短絡手段を具備しない内蔵平面アンテナにおいて、1/4波長の電気的長さを有する蛇行状アンテナ素子と、該アンテナ素子を地板から一定の高さに平行に保持する保持手段とを具備し、該アンテナ素子の一端を給電端にし、他端を開放端にすることを特徴とする内蔵平面アンテナ。 1. A built-in planar antenna having no short-circuit device incorporated in the housing of the portable radio, a serpentine antenna element having an electrical length of 1/4 wavelength, the constant the antenna element from the ground plane built planar antenna comprising a holding means for holding parallel to the height, one end of the antenna element and the feeding end, characterized in that the other end to open end.
  2. 【請求項2】誘電体基板の地板側あるいはその反対側の面上に、前記蛇行状アンテナ素子が一端の給電端と他端の開放端を、該給電端を携帯無線機の筺体中心側にし開放端を該筺体上部のケース間近になる形状に形成され、 To 2. A dielectric substrate base plate side or the opposite side on the surface thereof, said serpentine antenna element open end of the feeding end and the other end of the one end, the fed-Dentan the housing center of the portable radio the open end is formed in a shape to be close 該筺 body upper portion of the case,
    該誘電体基板が携帯無線機の筺体内上部に配置されることを特徴とする請求項1記載の内蔵平面アンテナ。 Built planar antenna according to claim 1, wherein the dielectric substrate is disposed in a housing in the upper portion of the portable radio.
  3. 【請求項3】前記蛇行状アンテナ素子が一端の給電端と他端の開放端を、該給電端を携帯無線機の筺体内中心側にし開放端が該筺体上部のケース間近になる形状に薄い板金を打ち抜いて形成され、携帯無線機の筺体内上部に配置されることを特徴とする請求項1記載の内蔵平面アンテナ。 The method according to claim 3, wherein said serpentine antenna element open end of the feeding end and the other end of the one end, thin shape open end to the fed-Dentan the housing in the center side of the portable wireless device is close 該筺 body upper portion of the case is formed by punching a metal plate, internal planar antenna according to claim 1, characterized in that it is arranged in the housing in the upper portion of the portable radio.
JP29829695A 1995-11-16 1995-11-16 Built-in plane antenna Pending JPH09139621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29829695A JPH09139621A (en) 1995-11-16 1995-11-16 Built-in plane antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29829695A JPH09139621A (en) 1995-11-16 1995-11-16 Built-in plane antenna

Publications (1)

Publication Number Publication Date
JPH09139621A true true JPH09139621A (en) 1997-05-27

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JP29829695A Pending JPH09139621A (en) 1995-11-16 1995-11-16 Built-in plane antenna

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999063618A1 (en) * 1998-06-03 1999-12-09 Ericsson, Inc. Multiple frequency band antenna
EP1191627A2 (en) * 2000-09-20 2002-03-27 Samsung Electronics Co., Ltd. Built-in single band antenna device and operating method thereof in mobile terminal
WO2003075398A1 (en) * 2002-03-01 2003-09-12 Ryhaenen Heikki Multifrequency antenna
EP1505689A1 (en) * 2003-08-08 2005-02-09 Hitachi Metals, Ltd. Chip antenna device and communications apparatus using same
US6995710B2 (en) 2001-10-09 2006-02-07 Ngk Spark Plug Co., Ltd. Dielectric antenna for high frequency wireless communication apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999063618A1 (en) * 1998-06-03 1999-12-09 Ericsson, Inc. Multiple frequency band antenna
EP1191627A2 (en) * 2000-09-20 2002-03-27 Samsung Electronics Co., Ltd. Built-in single band antenna device and operating method thereof in mobile terminal
EP1191627A3 (en) * 2000-09-20 2004-06-02 Samsung Electronics Co., Ltd. Built-in single band antenna device and operating method thereof in mobile terminal
US6885346B2 (en) 2000-09-20 2005-04-26 Samsung Electronics Co., Ltd. Built-in single band antenna device and operating method thereof in mobile terminal
US6995710B2 (en) 2001-10-09 2006-02-07 Ngk Spark Plug Co., Ltd. Dielectric antenna for high frequency wireless communication apparatus
WO2003075398A1 (en) * 2002-03-01 2003-09-12 Ryhaenen Heikki Multifrequency antenna
EP1505689A1 (en) * 2003-08-08 2005-02-09 Hitachi Metals, Ltd. Chip antenna device and communications apparatus using same
US7148851B2 (en) 2003-08-08 2006-12-12 Hitachi Metals, Ltd. Antenna device and communications apparatus comprising same

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