JP2538329B2 - Antenna device - Google Patents
Antenna deviceInfo
- Publication number
- JP2538329B2 JP2538329B2 JP63318775A JP31877588A JP2538329B2 JP 2538329 B2 JP2538329 B2 JP 2538329B2 JP 63318775 A JP63318775 A JP 63318775A JP 31877588 A JP31877588 A JP 31877588A JP 2538329 B2 JP2538329 B2 JP 2538329B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- ground plane
- plane conductor
- antenna
- ground
- 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.)
- Expired - Lifetime
Links
Landscapes
- Waveguide Aerials (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、アンテナ装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an antenna device.
（ロ）従来の技術 近年、移動通信技術の発達に伴ない、携帯通信に対す
る期待が高まっているが、それを実現するには通信機の
小型化、特にアンテナの小型化が必要である。(B) Conventional Technology In recent years, expectations for mobile communication have increased with the development of mobile communication technology. To realize this, it is necessary to reduce the size of communication devices, especially the size of antennas.
従来、移動通信では、使用電波として垂直偏波が多用
されている関係上、移動側ではこの垂直偏波に感度を有
する、例えば1/4波長ホィップアンテナが用いられてい
る。Conventionally, in mobile communication, since a vertically polarized wave is often used as a radio wave to be used, for example, a 1/4 wavelength whip antenna having sensitivity to the vertically polarized wave is used on the moving side.
然し乍ら、斯るアンテナは機器本体より突出して配置
されているため、操作時に破損され易く、また送話時、
垂直方向から相当傾けられるため、実効利得が大幅に低
下するという課題を有していた。更に、通信に使用する
周波数によって大きさが決まるため、所定の特性を確保
するには、自ずと形状的臨界を有するものであった。However, since such an antenna is arranged so as to protrude from the main body of the device, it is easily damaged during operation, and when transmitting,
Since it is tilted considerably from the vertical direction, there is a problem that the effective gain is significantly reduced. Further, since the size is determined by the frequency used for communication, it naturally has a geometrical criticality in order to secure a predetermined characteristic.
斯る課題に鑑み、例えば特開昭62−10902号公報（H01
Q 1/24）に開示された如き逆Ｆ形アンテナが提案され
ている。In view of such a problem, for example, JP-A-62-10902 (H01
An inverted F-shaped antenna as disclosed in Q 1/24) has been proposed.
（ハ）発明が解決しようとする課題 上記特開昭62−10902号公報に開示されている如き逆
Ｆ形アンテナは、地板導体（筐体11の背面16）と近接対
向された板状導体17と、板状導体17の上端部に設けられ
た接地部18と、上下の中央部に設けられた給電部19とよ
り構成され、また垂直・水平両偏波に対して感度を有す
るため、無線機が様々な方向に向けられた場合でも或る
程度の感度を確保することが出来、更に無線機本体に内
蔵することが可能となり、無線機の小型化に寄与するこ
とが出来る。(C) Problems to be Solved by the Invention An inverted F-shaped antenna as disclosed in Japanese Patent Laid-Open No. 62-10902 mentioned above has a plate-shaped conductor 17 closely opposed to a ground plane conductor (back surface 16 of the housing 11). And a grounding portion 18 provided at the upper end of the plate-shaped conductor 17 and a power feeding portion 19 provided at the upper and lower central portions, and since it has sensitivity to both vertical and horizontal polarized waves, Even when the device is oriented in various directions, a certain degree of sensitivity can be ensured, and the device can be incorporated in the wireless device main body, which can contribute to downsizing of the wireless device.
然し乍ら、斯る構成の逆Ｆ形アンテナでは、比帯域幅
（所定の条件を満たす帯域幅）が狭く、例えば移動通信
の移動体に搭載する場合、送受信の帯域を１つのアンテ
ナでカバーすることが出来なかった。However, the inverted F-shaped antenna having such a configuration has a narrow specific bandwidth (bandwidth satisfying a predetermined condition), and when mounted on a mobile body of mobile communication, for example, one antenna can cover the transmission / reception band. I could not do it.
（ニ）課題を解決するための手段 上記課題に鑑み、本発明は地板導体と、この地板導体
から所定距離だけ離間して設けられた金属板と、この金
属板の一辺の一端若しくはその近傍を前記地板導体に接
続するための第１接地部と、前記金属板の一辺の他端若
しくはその近傍に形成された給電部と、前記第１接地部
と給電部間に設けられ且つ前記金属板を前記地板導体に
接続するための第２接地部とを具備してなるアンテナ装
置を提供せんとするものである。(D) Means for Solving the Problems In view of the above problems, the present invention provides a ground plane conductor, a metal plate provided apart from the ground plane conductor by a predetermined distance, and one end of one side of the metal plate or the vicinity thereof. A first grounding part for connecting to the ground plane conductor, a power feeding part formed at the other end of one side of the metal plate or in the vicinity thereof, and a metal plate provided between the first grounding part and the power feeding part. An antenna device comprising a second ground portion for connecting to the ground plane conductor is provided.
（ホ）作用 本発明に依れば、第２接地部を設けることにより異な
る２つの共振周波数を有するアンテナ特性を得ることが
出来、比帯域幅の拡大を計ることが出来る。(E) Operation According to the present invention, the antenna characteristics having two different resonance frequencies can be obtained by providing the second ground portion, and the specific bandwidth can be expanded.
また、金属板の自由端を、第１及び第２接地部を支点
として回動可能とすれば、前記共振周波数を微調整する
ことが出来、アンテナ特性を使用目的に合致させること
が出来る。Further, if the free end of the metal plate is made rotatable about the first and second ground portions as a fulcrum, the resonance frequency can be finely adjusted, and the antenna characteristics can be matched to the purpose of use.
（ヘ）実施例 第１図は本発明の一実施例を示す図で、（１）は例え
ば無線機本体の筐体若しくは無線機内部に配設されたア
ース板よりなる地板導体、（２）は地板導体（１）から
所定距離だけ離間して設けられた金属板、（３）は金属
板（２）の一辺の一端若しくはその近傍を地板導体
（１）に接続するための第１接地部、（４）は金属板
（２）の一辺の他端若しくはその近傍に形成された給電
部、（５）は第１接地部（３）と給電部（４）間に設け
られ且つ金属板（２）を地板導体（１）に接続するため
の第２接地部である。(F) Embodiment FIG. 1 is a view showing an embodiment of the present invention, in which (1) is a ground plane conductor formed of, for example, a housing of the radio main body or a ground plate disposed inside the radio, (2) Is a metal plate provided at a predetermined distance from the ground plane conductor (1), and (3) is a first grounding part for connecting one end of one side of the metal plate (2) or its vicinity to the ground plane conductor (1) , (4) is a power feeding part formed at the other end of one side of the metal plate (2) or in the vicinity thereof, and (5) is provided between the first grounding part (3) and the power feeding part (4) and the metal plate ( A second grounding portion for connecting 2) to the ground plane conductor (1).
第１図における各部寸法を第１表の如く定めた場合の
アンテナのリターンロス特性を第２図（ａ）〜（ｅ）
に、また各実施例における測定値を第２表に夫々示す。
尚、このとき接地部（３）（５）と給電部（４）が設け
られた辺の対辺の地板導体（１）からの距離Ｈ′は、1
3.5mmに固定されているものとする。The return loss characteristics of the antenna when the dimensions of each part in FIG. 1 are determined as shown in Table 1 are shown in FIGS. 2 (a) to 2 (e).
Further, Table 2 shows the measured values in each example.
At this time, the distance H'from the ground plane conductor (1) on the opposite side of the side where the grounding parts (3) (5) and the power feeding part (4) are provided is 1
It is supposed to be fixed to 3.5 mm.
尚、第２表においてf1、f2は共振周波数を示してお
り、f1＜f2の関係を有している。また、VSWR1及びVSWR2
は各共周波数f1、f2における電圧定在波比を夫々示して
いる。更に、帯域幅はVSWR≦３（即ち、リターンロス≦
6.02dBに相当）で評価した値である。 In Table 2, f 1 and f 2 represent resonance frequencies and have a relationship of f 1 <f 2 . Also, VSWR 1 and VSWR 2
Shows the voltage standing wave ratio at each co-frequency f 1 and f 2 . Furthermore, the bandwidth is VSWR ≤ 3 (that is, return loss ≤
Equivalent to 6.02 dB).
第２表及び第２図より明らかなように第１接地部と給
電部との間に第２接地部を設ければ、比帯域幅を拡大す
ることが出来る。因みに、従来の比帯域幅は約60MHzで
ある。As is clear from Table 2 and FIG. 2, if the second ground portion is provided between the first ground portion and the power feeding portion, the specific bandwidth can be expanded. Incidentally, the conventional specific bandwidth is about 60 MHz.
次に、金属板（２）の自由端の地板導体（１）からの
距離Ｈ′を可変した場合について説明する。Next, a case where the distance H'from the ground plane conductor (1) at the free end of the metal plate (2) is varied will be described.
尚、金属板（２）としては、ａ＝54mm、ｂ＝29mmのも
のを用い、接地部側の高さはＨ＝3.2mmとする。As the metal plate (2), one having a = 54 mm and b = 29 mm is used, and the height on the ground contact side is H = 3.2 mm.
第３表は、各実施例における測定値を、また第３図
（ａ）〜（ｅ）は各実施例におけるアンテナのリターン
ロス特性を夫々示している。Table 3 shows measured values in each example, and FIGS. 3 (a) to 3 (e) show the return loss characteristics of the antenna in each example.
第３表及び第３図より明らかなように、接地部が設け
られた辺の対辺の地板導体（１）からの距離Ｈ′を可変
すれば、帯域幅及び電圧定在波比を調整することが出来
る。 As is clear from Table 3 and FIG. 3, the bandwidth and the voltage standing wave ratio can be adjusted by changing the distance H ′ from the ground plane conductor (1) on the opposite side of the side where the grounding portion is provided. Can be done.
次に、金属板（２）に切り込み（６）（６）（６）を
設けた第４図の場合について説明する。Next, the case of FIG. 4 in which the notches (6), (6) and (6) are provided in the metal plate (2) will be described.
尚、金属板（２）としては、ａ＝30mm、ｂ＝35mm、ｄ
＝15mmのものを用い、接地部側の高さはＨ＝5mmとす
る。更に、切り込みの長さｅ＝25mm、ｆ＝8mmとする。As the metal plate (2), a = 30 mm, b = 35 mm, d
= 15 mm, and the height on the grounding side is H = 5 mm. Further, the cut lengths e = 25 mm and f = 8 mm.
第４表は、各実施例における測定値を、また第５図
（ａ）〜（ｄ）は各実施例におけるアンテナのリターン
ロス特性を夫々示している。尚、帯域幅はVSWR≦３で評
価した値である。Table 4 shows measured values in each example, and FIGS. 5A to 5D show the return loss characteristics of the antenna in each example. The bandwidth is a value evaluated by VSWR ≦ 3.
第１図に示した実施例に依れば、比帯域幅の拡大を計
ることが出来るものの、共振周波数が高域側へシフトす
るという問題を生じる惧れがあるが、第４図の構成とす
ることにより共振周波数の高域側シフトを抑制すること
が出来る。因みに、ａ＝30mm、ｂ＝35mm、ｄ＝15mm、Ｈ
＝5mmとした場合の共振周波数は約1830MHzである。 According to the embodiment shown in FIG. 1, although the specific bandwidth can be expanded, there is a possibility that the resonance frequency shifts to the high frequency side. By doing so, the shift of the resonance frequency to the high frequency side can be suppressed. By the way, a = 30mm, b = 35mm, d = 15mm, H
The resonance frequency is about 1830 MHz when = 5 mm.
（ト）発明の効果 本発明に依れば、地板導体と、この地板導体から所定
距離だけ離間して設けた金属板と、この金属板の一辺の
一端若しくはその近傍を前記地板導体に接続するための
第１接地部と、前記金属板の一辺の他端若しくはその近
傍に形成された給電部と、前記第１接地部と給電部間に
設けられ且つ前記金属板を前記地板導体に接続するため
の第２接地部とを設けたので、異なる２つの共振周波数
を有するアンテナ特性を得ることが出来、比帯域幅の拡
大を計ることが出来る。また、金属板の自由端を第１及
び第２接地部を支点として回動可能とすれば、共振周波
数を微調整することが出来、アンテナ特性を使用目的に
合致させることが出来る。更に、切り込みを設ければ、
共振周波数の高域側へのシフトを防止することができ
る。(G) Effect of the Invention According to the present invention, a ground plane conductor, a metal plate spaced apart from the ground plane conductor by a predetermined distance, and one end of one side of the metal plate or the vicinity thereof are connected to the ground plane conductor. For connecting the metal plate to the ground plane conductor, a first grounding part for connecting the metal plate to the ground plate conductor, a power feeding part formed at the other end of one side of the metal plate or in the vicinity thereof, and provided between the first grounding part and the power feeding part. Since the second grounding portion is provided for this purpose, antenna characteristics having two different resonance frequencies can be obtained, and the specific bandwidth can be expanded. Further, if the free end of the metal plate can be rotated with the first and second grounding portions as fulcrums, the resonance frequency can be finely adjusted and the antenna characteristics can be matched to the purpose of use. Furthermore, if you make a notch,
It is possible to prevent the resonance frequency from shifting to the high frequency side.
第１図は本発明の一実施例を示す図、第２図（ａ）〜
（ｅ）及び第３図（ａ）〜（ｅ）はアンテナのリターン
ロス特性を示す図、第４図は金属板の他の実施例を示す
図、第５図（ａ）〜（ｄ）はアンテナのリターンロス特
性を示す図である。 （１）……地板導体、（２）……金属板、（３）……第
１接地部、（４）……給電部、（５）……第２接地部。FIG. 1 is a diagram showing an embodiment of the present invention, and FIG.
(E) and FIGS. 3 (a) to (e) show the return loss characteristics of the antenna, FIG. 4 shows another embodiment of the metal plate, and FIGS. 5 (a) to (d) show It is a figure which shows the return loss characteristic of an antenna. (1) ... ground plane conductor, (2) ... metal plate, (3) ... first grounding part, (4) ... feeding part, (5) ... second grounding part.
Claims (3)
け離間して設けられた金属板と、この金属板の一辺の一
端若しくはその近傍を前記地板導体に接続するための第
１接地部と、前記金属板の一辺の他端若しくはその近傍
に形成された給電部と、前記第１接地部と給電部間に設
けられ且つ前記金属板を前記地板導体に接続するための
第２接地部とを具備してなるアンテナ装置。1. A ground plane conductor, a metal plate spaced apart from the ground plane conductor by a predetermined distance, and a first ground portion for connecting one end of one side of the metal plate or its vicinity to the ground plane conductor. A power feeding portion formed at the other end of one side of the metal plate or in the vicinity thereof, and a second grounding portion provided between the first grounding portion and the power feeding portion and for connecting the metal plate to the ground plane conductor. An antenna device comprising:
特徴とする請求項１記載のアンテナ装置。2. The antenna device according to claim 1, wherein the metal plate is provided with a notch.
支点として前記地板導体からの距離を可変するようにな
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。3. The antenna device according to claim 1, wherein a free end of the metal plate is configured to change a distance from the ground plane conductor with the first and second ground portions as fulcrums. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63318775A JP2538329B2 (en) | 1988-02-23 | 1988-12-16 | Antenna device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4024088 | 1988-02-23 | ||
| JP63-40240 | 1988-02-23 | ||
| JP63318775A JP2538329B2 (en) | 1988-02-23 | 1988-12-16 | Antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01295505A JPH01295505A (en) | 1989-11-29 |
| JP2538329B2 true JP2538329B2 (en) | 1996-09-25 |
Family
ID=26379687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63318775A Expired - Lifetime JP2538329B2 (en) | 1988-02-23 | 1988-12-16 | Antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2538329B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550818U (en) * | 1991-11-29 | 1993-07-02 | 東光株式会社 | Microstrip antenna |
| CA2181887C (en) * | 1995-04-24 | 2000-05-16 | Seiji Hagiwara | Microstrip antenna device |
| JPH09312517A (en) * | 1996-05-24 | 1997-12-02 | Saitama Nippon Denki Kk | Built-in antenna system |
| JP3989200B2 (en) * | 2001-07-26 | 2007-10-10 | 株式会社東芝 | Computer |
| US6882318B2 (en) * | 2002-03-04 | 2005-04-19 | Siemens Information & Communications Mobile, Llc | Broadband planar inverted F antenna |
| EP1548880A4 (en) * | 2002-06-11 | 2005-11-09 | Nippon Sheet Glass Co Ltd | Terrestrial wave receiving antenna device and antenna gain adjusting method |
| JP2005102286A (en) * | 2004-11-08 | 2005-04-14 | Toshiba Corp | Electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58104504A (en) * | 1981-12-16 | 1983-06-22 | Matsushita Electric Ind Co Ltd | Antenna for radio equipment |
| JPS60182203A (en) * | 1984-02-29 | 1985-09-17 | Hitoshi Tokumaru | Microstrip antenna in common use for two frequencies |
| JPS61210707A (en) * | 1985-03-14 | 1986-09-18 | Mitsubishi Electric Corp | Antenna system |
| JPS6239317U (en) * | 1985-08-27 | 1987-03-09 |
-
1988
- 1988-12-16 JP JP63318775A patent/JP2538329B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01295505A (en) | 1989-11-29 |
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