JP2001339226A - Antenna system - Google Patents

Antenna system

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Publication number
JP2001339226A
JP2001339226A JP2000156056A JP2000156056A JP2001339226A JP 2001339226 A JP2001339226 A JP 2001339226A JP 2000156056 A JP2000156056 A JP 2000156056A JP 2000156056 A JP2000156056 A JP 2000156056A JP 2001339226 A JP2001339226 A JP 2001339226A
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Prior art keywords
antenna
dielectric
electrode pattern
auxiliary element
element
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Pending
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JP2000156056A
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Japanese (ja)
Inventor
Shinya Nakamura
真也 中村
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Nec Saitama Ltd
埼玉日本電気株式会社
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Abstract

PROBLEM TO BE SOLVED: To overcome the problem such that a matching circuit is needed and then the gain degreases as compared with the gain of a dielectric antenna element since a conventional antenna system can not be lowered in resonance frequency sufficiently when miniaturized and mounted. SOLUTION: A plate type auxiliary element 3 which is conductive is fitted to an antenna element having an electrode pattern 2 formed on a dielectric 1. A feed point 5 is connected to the electrode pattern 2. Consequently, the resonance frequency of the antenna can be lowered by the effect of wavelength shortening obtained by using the dielectric element and the effect of the auxiliary element 3 which is connected, and the antenna characteristics can be improved while a limited mount space is effectively used.

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】本発明はアンテナ装置に係り、特に誘電体に電極パターンを形成した携帯無線機のアンテナ装置に関する。 The present invention relates generally relates to an antenna device, and more particularly to an antenna device for a portable radio device provided with electrode patterns in a dielectric.

【0002】 [0002]

【従来の技術】携帯無線機が小型化するにつれて、その受信アンテナの搭載スペースが縮小され、図5に示すような電極パターンを構成した誘電体アンテナ素子が利用されてきている。 BACKGROUND OF THE INVENTION As portable radio is miniaturized, the mounting space of the receiving antenna is reduced, the dielectric antenna elements that constitute an electrode pattern as shown in FIG. 5 has been used. これは電極パターン2を直方体状の誘電体1の一面ではジグザグ状に誘電体1の上面では一部を除いて略全面を覆うようなパターンとすることにより、インダクタンス成分を持たせると共に、誘電体1により波長短縮の効果もある。 By this is a pattern as the electrode patterns 2 a rectangular parallelepiped shape one face of the dielectric 1 cover substantially the entire surface except for a part of the upper surface of the dielectric 1 in a zigzag shape, it causes no inductance, dielectric there is also the effect of wavelength shortening by one. なお、図5中、5は給電点である。 In FIG 5, 5 are feed point.

【0003】これにより、この従来のアンテナ装置は、 [0003] As a result, the conventional antenna device,
一辺が約λ/40(λは受信電波の波長)にも小型化することができるものであり、他の電子部品と同様にプリント基板に実装してアンテナとして動作するものである。 One side is intended (the lambda the wavelength of the received wave) about lambda / 40 can be downsized to, and operates as an antenna mounted in the same manner as other electronic components on a printed board.

【0004】一方、図6に示す従来のアンテナ装置は、 On the other hand, the conventional antenna device shown in FIG. 6,
メアンダ状に構成された逆Fアンテナで、アンテナエレメント8の一端が二股に分かれ、一方が接地され、他方が給電点5に接続されている。 In the inverted-F antenna configured meander, one end of the antenna element 8 is bifurcated, one of which is grounded, and the other is connected to the feeding point 5. また、図7に示す従来のアンテナ装置は、メアンダ状に構成された逆Lアンテナで、アンテナエレメント8の一端が給電点5に接続されている。 Further, the conventional antenna device shown in FIG. 7, a reverse L antenna configured meander, one end of the antenna element 8 is connected to the feeding point 5. これらの逆Fアンテナや逆Lアンテナなどもサイズを小型化することができることが知られている。 It is known that the sizes such as these inverted-F antenna or an inverted L antenna can be miniaturized.

【0005】 [0005]

【発明が解決しようとする課題】しかるに、図5に示した従来のアンテナ装置では、例えば図3に示すように、 [SUMMARY OF THE INVENTION] However, in the conventional antenna device shown in FIG. 5, for example, as shown in FIG. 3,
金属で構成されている筐体ケース11を有する携帯無線機のプリント板上にこのアンテナ装置を他の電子部品1 Portable radio print other electronic components this antenna device on a plate of a housing case 11 is made of a metal 1
0と一緒に実装した場合、電子部品10がない場合と比較して約8dB程度の利得劣化が生じる。 0 as when implemented together, the gain deterioration of about 8dB compared to the case where there is no electronic component 10 occurs.

【0006】また、図6及び図7に示した従来のアンテナ装置では、実装可能なλ/15程度に大きさに小型化して実装すると、十分に共振周波数を下げることができないため、外付けでコイルを用いた整合回路を必要とし、その結果、誘電体アンテナ素子の代わりに用いたところ周辺に電子部品が搭載されていないときの誘電体アンテナ素子の利得と比較して利得が約2dB程度低下してしまう。 Further, in the conventional antenna device shown in FIGS. 6 and 7, since when implemented miniaturized to a size of about mountable lambda / 15, can not be lowered sufficiently resonant frequency, an external requires matching circuit using a coil, as a result, surrounding the gain decreases about 2dB as compared with the gain of the dielectric antenna element when the electronic component is not mounted was used instead of the dielectric antenna element Resulting in. これは、限られた搭載スペース内でメアンダ状にしても十分に共振周波数を低くできないため、整合回路により共振周波数を下げており、ここでの大きいロスが生じているためである。 This is because within a limited mounting space meander To can not be sufficiently lowered resonance frequency also has lowered the resonant frequency by the matching circuit, because the large losses here occurs.

【0007】本発明は以上の点に鑑みなされたもので、 [0007] The present invention has been made in view of the above,
アンテナ利得を向上し得るアンテナ装置を提供することを目的とする。 And to provide an antenna device capable of improving the antenna gain.

【0008】また、本発明の他の目的は、限られた搭載スペースを有効に活用し得るアンテナ装置を提供することにある。 Another object of the present invention is to provide a effective use to be the antenna device of the limited mounting space.

【0009】 [0009]

【課題を解決するための手段】本発明は上記の目的を達成するため、導電体上に電極パターンが形成されたアンテナ装置において、電極パターンの一部に一端が接続された導電性の補助エレメントと、電極パターンに給電する給電点とを有する構成としたものである。 Since the present invention SUMMARY OF THE INVENTION The To achieve the above object, in the antenna device electrode pattern is formed on the conductor, a portion at one end is connected the conductive auxiliary element electrode pattern When, in which a structure having a feed point for feeding the electrode pattern.

【0010】この発明では、誘電体の波長短縮の効果と導電性の補助エレメントを接続した効果により、アンテナ長を確保できると共にアンテナの共振周波数を下げることができる。 [0010] In the present invention, it is possible to reduce the effect of connecting the auxiliary element effects a conductive wavelength shortening the dielectric, the resonance frequency of the antenna can be ensured the antenna length. また、アンテナ特性を向上するために誘電体の大きさを変えずに、アンテナの放射特性を大きくすることができる。 Further, without changing the size of the dielectric in order to improve the antenna characteristics, it is possible to increase the radiation characteristics of the antenna.

【0011】ここで、上記の導電性の補助エレメントは、板状であることが望ましい。 [0011] Here, the auxiliary element of the conductive is preferably a plate shape. また、上記の導電性の補助エレメントは、絶縁物に金属メッキが施されていてもよい。 The auxiliary elements of the conductive may be metal-plated on the insulator. 補助エレメントの形状は細かく変えることができる。 The shape of the auxiliary element can be varied finely.

【0012】また、上記の目的を達成するため、本発明は、給電点が基板上に設けられており、基板及び導電体を収容する筐体ケースの内壁に導電性の補助エレメントの他端が取り付けられていることを特徴とする。 [0012] To achieve the above object, the present invention is the feeding point is provided on the substrate, the other end of the conductive auxiliary element to the inner wall of the housing case for housing the substrate and conductor and wherein the attached. この発明では、基板上の実装スペースを誘電体の実装スペースのみとすることができる。 In the present invention, the mounting space on the substrate can be only mounting space of the dielectric.

【0013】ここで、本発明は、電極パターンの一端は給電点に接続され、逆Lアンテナとして動作することができ、また、電極パターンの端部が二股に分かれ、一方が給電点に接続され、他方が接地されて逆Fアンテナとして動作することができる。 [0013] Here, the present invention, one end of the electrode pattern is connected to the feeding point, it is possible to act as a reverse L antenna, also divided ends of the electrode pattern into two, one being connected to a feeding point and the other can operate as an inverted F antenna is grounded.

【0014】 [0014]

【発明の実施の形態】次に、本発明の実施の形態について図面と共に説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given, with drawings, embodiments of the present invention. 図1は本発明になるアンテナ装置の一実施の形態の斜視図、図2は本発明になるアンテナ装置を筐体に収納したときの一実施の形態の縦断側面図を示す。 Figure 1 is a perspective view of one embodiment of an antenna device according to the present invention, Figure 2 shows a vertical side view of an embodiment when the antenna device according to the present invention housed in the housing. 両図中、同一構成部分には同一符号を付してある。 In both figures, the same components are denoted by the same reference numerals.

【0015】図1に示すように、この実施の形態のアンテナ装置は、誘電体1、電極パターン2、導電性の板状補助エレメント3にて構成されている。 [0015] As shown in FIG. 1, the antenna device of this embodiment is constituted by the dielectric 1, the electrode pattern 2, a conductive plate-like auxiliary element 3. 電極パターン2 Electrode pattern 2
は従来装置と同様に、直方体状の誘電体1の正面と上面に金属メッキで形成されているが、従来と異なり、図2 Is as in the conventional apparatus, are formed by metal plating on the front and the upper surface of the rectangular parallelepiped dielectric 1, unlike the conventional, 2
の基板6上の給電点5から導電性の板状補助エレメント3との接続点4まで構成されている。 And a feeding point 5 on the substrate 6 before the connection point 4 of the plate-like auxiliary element 3 of the conductivity. 導電性の板状補助エレメント3は、導体であり、誘電体1の上面に構成された電極パターン2と接続点4を介して接続されている。 Plate auxiliary element 3 of the conductivity, a conductor, and is connected via a connection point 4 and the electrode pattern 2 which is configured on the top surface of the dielectric 1. 本実施の形態のアンテナ装置は、誘電体1の電極パターン2に給電している。 The antenna device of this embodiment is in the feed to the electrode pattern 2 of the dielectric 1. 筐体ケース7は、誘電体1を収容しており、導電性板状補助エレメント3がその上内壁に取り付けられている。 Housing case 7 accommodates the dielectric 1, the conductive plate auxiliary element 3 is mounted to the inner wall thereon.

【0016】このアンテナ装置を図3に9で示すように、金属で構成されている筐体ケース11の内部に電子部品10が搭載されている携帯無線機に実装して利得を測定したところ、周辺に電子部品10が搭載されていないときの、誘電体アンテナ素子の利得と同等の値が得られることが確認された。 [0016] When the antenna device as shown in FIG. 3 at 9, to measure the gain and mounted on the portable wireless device is an electronic component 10 is mounted inside the housing case 11 is composed of metal, when the electronic component 10 on the periphery is not mounted, value equivalent to the gain of the dielectric antenna elements that were obtained.

【0017】これは、図2に示すように、誘電体1に導電性の板状補助エレメント3を接続することで、本実施の形態のアンテナ装置は逆Lアンテナとして動作するものの、誘電体アンテナ素子を用いることで図7に示した従来の逆Lアンテナでは得られない適度な波長短縮効果が得られ、大幅な利得改善が図られたためであると考えられる。 [0017] This is because, as shown in FIG. 2, by connecting the plate-like auxiliary element 3 of the conductivity to dielectric 1, although the antenna device of this embodiment operates as an inverted-L antenna, a dielectric antenna moderate wavelength shortening effect can not be obtained by the conventional inverted L antenna shown in FIG. 7 is obtained by using a device, believed to be due to significant gain improvement is achieved.

【0018】また、誘電体による波長短縮効果と接続した導電性の板状補助エレメント3の効果にてアンテナの共振周波数を下げているため、整合回路による損失を小さくすることができる。 Further, since the lower the resonance frequency of the antenna at the effect of the conductive plate-like auxiliary element 3 connected to the wavelength shortening effect by the dielectric, it is possible to reduce the loss due to the matching circuit. この利得向上効果は、筐体ケースが金属でない場合においても、あることが確認された。 The gain enhancement effect, when the housing case is not made of metal also, it was confirmed that. 更に、この実施の形態では、導電性の板状補助エレメント3を電極パターン2に接続することにより、基板6 Further, in this embodiment, by connecting the plate-like auxiliary element 3 of the conductivity to the electrode pattern 2, the substrate 6
(グランド)からの距離が離れ、搭載されている他の部品の影響を受けることが少ないため、アンテナ利得を向上することができる。 Away distance from (ground), since it is less affected by other components mounted, it is possible to improve the antenna gain.

【0019】誘電体アンテナ素子のみで利得を改善するためには、誘電体素子を大きくする必要があるが、この実施の形態では、図2に示したように、筐体ケース7に導電性の板状補助エレメント3を貼り付けるようにしているため、基板6上の実装スペースは、誘電体1の実装スペースのみであり、基板6と筐体ケース7の間の空いたスペースを利用して、導電性の板状補助エレメント3 [0019] To improve the only gain dielectric antenna element, it is necessary to increase the dielectric element, in this embodiment, as shown in FIG. 2, the conductive to the housing case 7 because you have pasted plate-like auxiliary element 3, the mounting space on the substrate 6 is only a mounting space of the dielectric 1, by utilizing the empty space between the substrate 6 and the housing case 7, conductive plate-like auxiliary element 3
を設けることができ、基板6上の実装スペースを大きくさせる必要がない。 Can be provided, there is no need to increase the mounting space on the board 6.

【0020】このように、この実施の形態では、誘電体1上に形成された電極パターン22、導電性の板状補助エレメント3を取り付けることにより、小型化、高利得を得ることができる。 [0020] Thus, in this embodiment, the electrode pattern 22 is formed on the dielectric 1, by attaching the plate-like auxiliary element 3 of the conductivity can be miniaturized, to obtain a high gain.

【0021】次に、本発明の他の実施の形態について説明する。 Next, a description of another embodiment of the present invention. 図4は本発明になるアンテナ装置の他の実施の形態の斜視図を示す。 Figure 4 shows a perspective view of another embodiment of an antenna device according to the present invention. 図1の実施の形態は、逆Lアンテナとして動作させたものであるが、この実施の形態は、 Embodiment of FIG. 1, but in which was operated as an inverted L antenna, this embodiment,
図4に示すように、電極パターン2の一部を分岐して電極パターン部12を介して接地する構成とすることにより、逆Fアンテナとして動作させるようにしたものである。 As shown in FIG. 4 has the structure in which branches a part of the electrode pattern 2 is grounded through the electrode pattern 12, in which so as to operate as an inverted F antenna. この実施の形態も上記の実施の形態と同様の効果を奏する。 This embodiment also exhibits the same effect as the above embodiment.

【0022】なお、本発明は上記の実施の形態に限定されるものではなく、例えば導電性の板状補助エレメント3は導体であるが、絶縁物に金属メッキを施した構成のものを使用することもできる。 [0022] The present invention is not limited to the embodiment described above, for example, a conductive plate-like auxiliary element 3 is conductive, to use a configuration which has been subjected to metal plating on an insulator it is also possible.

【0023】 [0023]

【発明の効果】以上説明したように、本発明によれば、 As described in the foregoing, according to the present invention,
誘電体の波長短縮の効果と導電性の補助エレメントを接続した効果により、アンテナ長を確保できると共にアンテナの共振周波数を下げることができるため、整合回路による損失を小さくでき、アンテナ利得を大幅に向上できる。 The effect of connecting the effects and auxiliary element conductive wavelength shortening the dielectric, it is possible to lower the resonant frequency of the antenna can be ensured the antenna length, it is possible to reduce the loss by the matching circuit, significantly increases the antenna gain it can.

【0024】また、本発明によれば、アンテナ特性を向上するために誘電体の大きさを変えずに、アンテナの放射特性を大きくすることができ、また、補助エレメントの形状は細かく変えることができるため、限られた搭載スペースを有効に活用することができる。 Further, according to the present invention, without changing the size of the dielectric in order to improve the antenna characteristics, the radiation characteristics of the antenna can be increased, also the shape of the auxiliary element be varied finely since it is possible to effectively utilize the limited mounting space.

【0025】また、本発明によれば、給電点が基板上に設けられており、基板及び導電体を収容する筐体ケースの内壁に導電性の補助エレメントの他端が取り付けられることにより、基板上の実装スペースを誘電体の実装スペースのみとすることかできるため、基板上の実装スペースを大きくすることなく、装置全体の形状の大型化を防止できる。 Further, according to the present invention, a feeding point is provided on the substrate, by the other end of the conductive auxiliary element is attached to the inner wall of the housing case for housing the substrate and conductor, substrate since the mounting space of the upper may or be only mounting space of the dielectric, without increasing the mounting space on the substrate can be prevented an increase in the size of the shape of the entire apparatus.

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

【図1】本発明の一実施の形態の斜視図である。 1 is a perspective view of one embodiment of the present invention.

【図2】本発明を筐体ケースに収容したときの一実施の形態の縦断面図である。 The [2] The present invention is a longitudinal sectional view of an embodiment when housed in a housing case.

【図3】本発明装置が実装された形態無線機の一例の斜視図である。 3 is a perspective view of an example of the device of the present invention is to implement forms radios.

【図4】本発明の他の実施の形態の斜視図である。 4 is a perspective view of another embodiment of the present invention.

【図5】従来の一例の斜視図である。 5 is a perspective view of a conventional example.

【図6】従来の他の例の構成図である。 6 is a configuration diagram of another conventional example.

【図7】従来の更に他の例の構成図である。 7 is a block diagram of a conventional still another example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 誘電体 2 電極パターン 3 導電性の板状補助エレメント 4 接続点 5 給電点 6 基板 7 筐体ケース 9 誘電体アンテナ素子 10 電子部品 11 金属で構成されている筐体ケース 12 電極パターン部 First dielectric 2 electrode pattern 3 conductive plate auxiliary element 4 connecting point 5 feeding point 6 substrate 7 housing case 9 dielectric antenna element 10 electronic component 11 housing case 12 electrode pattern portion is formed of a metal

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 導電体上に電極パターンが形成されたアンテナ装置において、 前記電極パターンの一部に一端が接続された導電性の補助エレメントと、 前記電極パターンに給電する給電点とを有することを特徴とするアンテナ装置。 1. A antenna apparatus electrode pattern on the conductor is formed, to have the auxiliary element one end of the connected electrically conductive portion of the electrode pattern, and a feeding point that supplies power to the electrode pattern antenna apparatus characterized.
  2. 【請求項2】 前記補助エレメントは、板状であることを特徴とする請求項1記載のアンテナ装置。 Wherein said auxiliary element is an antenna device according to claim 1, characterized in that the plate-shaped.
  3. 【請求項3】 前記補助エレメントは、絶縁物に金属メッキが施されていることを特徴とする請求項1又は2記載のアンテナ装置。 Wherein the auxiliary element is an antenna device according to claim 1 or 2, wherein the metal plating is applied to the insulator.
  4. 【請求項4】 前記給電点は基板上に設けられており、 Wherein said feed point is provided on the substrate,
    前記基板及び導電体を収容する筐体ケースの内壁に前記導電性の補助エレメントの他端が取り付けられていることを特徴とする請求項1記載のアンテナ装置。 The antenna device according to claim 1, wherein the other end of the conductive auxiliary element to the inner wall of the housing case for housing the substrate and conductors are mounted.
  5. 【請求項5】 前記電極パターンの一端は前記給電点に接続され、逆Lアンテナとして動作することを特徴とする請求項1又は2記載のアンテナ装置。 Wherein one end of said electrode pattern is connected to the feed point, the antenna device according to claim 1 or 2, characterized in that to operate as inverted L antenna.
  6. 【請求項6】 前記電極パターンの端部が二股に分かれ、一方が前記給電点に接続され、他方が接地されて逆Fアンテナとして動作することを特徴とする請求項1又は2記載のアンテナ装置。 6. The end of the electrode pattern is divided into two, one being connected to the feed point, the antenna device of the other according to claim 1 or 2, characterized in that to operate as an inverted F antenna is grounded .
JP2000156056A 2000-05-26 2000-05-26 Antenna system Pending JP2001339226A (en)

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Cited By (77)

* Cited by examiner, † Cited by third party
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JP2008148356A (en) * 2008-02-04 2008-06-26 Murata Mfg Co Ltd Antenna apparatus
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JP2009094859A (en) * 2007-10-10 2009-04-30 Panasonic Corp Antenna unit and mobile terminal using thereof
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