JPS63102501A - Plane antenna - Google Patents
Plane antennaInfo
- Publication number
- JPS63102501A JPS63102501A JP24892586A JP24892586A JPS63102501A JP S63102501 A JPS63102501 A JP S63102501A JP 24892586 A JP24892586 A JP 24892586A JP 24892586 A JP24892586 A JP 24892586A JP S63102501 A JPS63102501 A JP S63102501A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- converter
- amplifier
- antenna elements
- output terminal
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
【発明の詳細な説明】
ｑ）産業上の利用分野
本発明はＳＨＦ放送の受信に好適なマイクロストリップ
ラインアンテナ等の平面アンテナに関する０
（ロ）従来の技術
従来、ＳＨＦ放送の受信に用いられるマイクロストリッ
プアンテナは特開昭５７−９９８０３号公報（ＨＤＩＱ
１３１０８）に水爆れる如く、その給電部に各素子への
等位相等電力分配全目的として２分岐線路を繰り返し用
いて最終的に２° 個（ｎ−１，２，６・・・）のアン
テナ素子に分配し総合利得を上げる様にしている、
しかしながら、アンテナ素子数、従って分配数を増やす
と、それに伴ない給電部の線路長も長くなりそれによる
伝送損失に無視できないものとなるＯ
（ハ）発明が解決しようとする開門点
本発明は上述の点に鑑み為されｔものであり、平面アン
テナにおいてアンテナ素子数が増えて給電部の線路長が
長くなっても伝送損失によるアンテナ特性の劣化を抑え
ることを目的とする。DETAILED DESCRIPTION OF THE INVENTION q) Industrial Field of Application The present invention relates to a flat antenna such as a microstrip line antenna suitable for receiving SHF broadcasting. The strip antenna is disclosed in Japanese Patent Application Laid-Open No. 57-99803 (HDIQ
13108), a two-branch line was repeatedly used for the purpose of distributing equal phase and equal power to each element in the feed section, and finally 2° (n-1, 2, 6...) antennas were created. However, as the number of antenna elements, and therefore the number of distributions, increases, the line length of the feeding section also increases, resulting in a non-negligible transmission loss. ) Opening Points to be Solved by the Invention The present invention was created in view of the above-mentioned points, and even if the number of antenna elements in a planar antenna increases and the line length of the feeding section becomes longer, the deterioration of antenna characteristics due to transmission loss will not occur. The purpose is to suppress
に）間切点を解決するための手段
本発明は、アンテナ素子とコンバータとの間を結合する
ストリップ線路の途中に増巾器を配してなる０
一作 用
上述の手段により給電部のス） ＩＪフプ線路で信号が
減衰する前に増巾器により増巾されるため総合雑音指数
が向上する。(ii) Means for solving the intercontinuation point The present invention provides an amplifier in which an amplifier is disposed in the middle of a strip line coupling between an antenna element and a converter. The overall noise figure improves because the signal is amplified by the amplifier before it is attenuated by the FFP line.
（へ）実施例 以下、図面に従い本発明の一実施例？説明する。(f) Example An embodiment of the present invention will be described below according to the drawings. explain.
まず、第１図に本発明の原理図を示す１図中１１＋１；
（ｌし・ｇンテナ累子、＋２１は受信した１２ＧＨｚ帯
の電波をＩＧＨｚ帯の第１工Ｆ信号に変換するコンバー
タ、＋３＋１前記アンテナ素子とコンバータ間のスト’
）−７１線路、（４）（４１ばこのストリップ線路間に
配さｎｔ増巾器、１５＋ ＋５＋は同じくストリップ線
路間に配され定位相調整用の移相器である。First, Fig. 1 shows a diagram of the principle of the present invention. In Fig. 1, 11+1; Strike between the antenna element and the converter
) -71 line, (4) (41) nt amplifier placed between the strip lines, 15+ +5+ is a phase shifter placed between the strip lines for constant phase adjustment.
本発明の特＠は、アンテナ素子からコンバータまでのス
トリップ線間に増巾器を配し次点であり、これによって
、給電線路が長くなっても雑音指数（ＮＦ）が劣化しな
いり
次に第２図に本発明の一実施例２示す□本実施例の平面
アンテナに、誘電体基板（６）上にクランク型導体によ
り構成された４本のアンテナ素子ｔｌＨ１１・・・が形
成されている□そして、このアンテナ素子の一端に夫々
、スト’）−Ｊプ線路（３＋に１９２本毎に結合され、
最終的にコンバータ（図示省略）が接続される出力端子
（７１に結合される□また、アンテナ素子の他ａｈ開放
となっている）尚、コンバータは平面アンテナと一体に
設けられる。前記アンテナ素子の一端と出力端子との間
にはインピーダンス整合回路を含んだマイクロ波集積回
路によるＦＥＴにより構成される増巾器（４）（４１が
配されている。この増巾器の１潟はコンバータから供給
される。The feature of the present invention is that an amplifier is placed between the strip lines from the antenna element to the converter, which prevents the noise figure (NF) from deteriorating even if the feed line becomes long. Fig. 2 shows a second embodiment of the present invention □ In the planar antenna of this embodiment, four antenna elements tlH11 constituted by crank-type conductors are formed on a dielectric substrate (6) □ Then, each of the 192 lines is connected to one end of this antenna element, and
The output terminal (coupled to 71) to which a converter (not shown) is finally connected is also open to the antenna element. Note that the converter is provided integrally with the planar antenna. Between one end of the antenna element and the output terminal, an amplifier (4) (41) constituted by an FET using a microwave integrated circuit including an impedance matching circuit is disposed. is supplied from the converter.
尚、本実施例ではコンバータへの出力端子（７１がアン
テナ素子アレイの中央に位置するｔめ、各アンテナ素子
から、出力端子（７］までの距離は均等である。従って
、位相ずれは発生しないため移相器に不要となる□
次に本発明と従来例とで雑音指数を比較してみるｎ
アンテナ基板としては、厚さ０．８ ｆｌ大きさ４５０
ｎｘ４５Ｑａ＋のテフロン基板？用いて１６素子のアン
テナ素子全構成したものを試料とし九〇第３図ｆｒ）は
従来の平面アンテナの等価回路図であり、アンテナ素子
（Ａ）とコンバータ１２＋との間のストリップ線路を第
１減衰器ＣＢ）とすると、この減衰器での減衰は１．１
ｄＢである。コンバータ１２＋内にぼ、第１、第２増巾
器（Ｃ）（Ｄ）があり、夫々、ゲイン１０（ｉＢ、雑音
指数２．５ ｄ Ｂである−１また、コンバータ内での
線路を第２減衰器（Ｅ）とすると、この減衰器での減衰
は０．１ｄＢである。In this example, the output terminal (71) to the converter is located at the center of the antenna element array, and the distances from each antenna element to the output terminal (7) are equal. Therefore, no phase shift occurs. Therefore, it is unnecessary for the phase shifter □ Next, let's compare the noise figure between the present invention and the conventional example. The antenna board has a thickness of 0.8 fl and a size of 450 mm.
Teflon board for nx45Qa+? Fig. 90 (3 fr) is an equivalent circuit diagram of a conventional planar antenna, in which the strip line between the antenna element (A) and the converter 12+ is connected to the first Attenuator CB), the attenuation in this attenuator is 1.1
It is dB. Inside the converter 12+, there are first and second amplifiers (C) and (D), each with a gain of 10 (iB) and a noise figure of 2.5 dB. Assuming 2 attenuators (E), the attenuation in this attenuator is 0.1 dB.
上記等価回路の総合雑音指数を計算すると６．７ｄＢ、
また等値入力雑音温度は６８６度でろっ九□次に第３図
←）に本発明の平面アンテナの等価回路を示す。The total noise figure of the above equivalent circuit is calculated as 6.7dB.
Also, the equivalent input noise temperature is 686 degrees.Next, Fig. 3←) shows an equivalent circuit of the planar antenna of the present invention.
コンバータ（２］＠から見て最初の分岐点から２番目の
分岐点までのストリップ線路長が約１２浦、その損失約
０．５ ｄ Ｂとなり、ストリップ線路全体の損失のう
ち大きな割合を占めるため、第１増巾器（Ｃ）’ｉ、１
番目と２番目の分岐点間で２番目の分岐点に近い位置に
配している□従って等何回路上ではアンテナ素子（Ａ）
と第１減衰器（Ｂ）との間に第１増巾器（Ｃ）が位置す
る□尚、この第１増巾器は本来コンバータ内に配されて
いたものである。The length of the strip line from the first branch point to the second branch point as seen from converter (2) @ is approximately 12 ura, and the loss is approximately 0.5 dB, which accounts for a large proportion of the loss of the entire strip line. , first amplifier (C)'i, 1
The antenna element (A) is placed close to the second branch point between the second branch point and the second branch point.
A first amplifier (C) is located between the converter and the first attenuator (B). Note that this first amplifier was originally placed inside the converter.
この等価回路によると雑音指数ｉ２．８ ｄ Ｂ、等価
入力雑？温度に２６５度となり、従来に比較して夫々０
．９ ｄ ８．１２１度改善されることになる。According to this equivalent circuit, the noise figure is i2.8 dB, equivalent input noise? The temperature is 265 degrees, which is 0 compared to the previous one.
．． 9 d 8.121 degrees improvement.
（ト）発明の効果
上述の如く本発明に依ればマイクロストリップラインア
ンテナ等の平面アンテナにおいて、アンテナ素子数が増
え給電部の線路長が長くなっても伝送損失によるアンテ
ナ特性を抑えることができ、従来例に比べて雑音指数が
大巾に改善される□(G) Effects of the Invention As described above, according to the present invention, in a planar antenna such as a microstrip line antenna, even if the number of antenna elements increases and the line length of the feeding section increases, antenna characteristics due to transmission loss can be suppressed. , the noise figure is greatly improved compared to the conventional example□
第１図ａ本発明の原理図、第２図は本発明の一実施例に
おける平面アンテナの斜現図、第３図（イ）←）は夫々
、従来及び本発明の平面アンテナの等価回路図である。
１１＋ｆ’ｌ＋・・・アンテナ素子、＋２１・・・コン
バータ、１３＋・・・ストリップ線路、ｔＪＩＪ・・・
増巾器。Fig. 1a is a principle diagram of the present invention, Fig. 2 is a perspective view of a planar antenna according to an embodiment of the present invention, and Fig. 3 (a) is an equivalent circuit diagram of a conventional planar antenna and a planar antenna of the present invention, respectively. It is. 11+f'l+... antenna element, +21... converter, 13+... strip line, tJIJ...
Amplifier.
Claims (1)
と、このアンテナ素子の一端とコンバータとの間を結合
するストリップ線路とを有する平面アンテナにおいて、
前記ストリップ線路の途中に増巾器を配したことを特徴
とする平面アンテナ。(1) A planar antenna having a plurality of antenna elements formed on the surface of a dielectric substrate and a strip line coupling between one end of the antenna element and a converter,
A planar antenna characterized in that an amplifier is arranged in the middle of the strip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24892586A JPS63102501A (en) | 1986-10-20 | 1986-10-20 | Plane antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24892586A JPS63102501A (en) | 1986-10-20 | 1986-10-20 | Plane antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63102501A true JPS63102501A (en) | 1988-05-07 |
Family
ID=17185459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24892586A Pending JPS63102501A (en) | 1986-10-20 | 1986-10-20 | Plane antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63102501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0435301A (en) * | 1990-05-28 | 1992-02-06 | A T R Koudenpa Tsushin Kenkyusho:Kk | Active array antenna |
-
1986
- 1986-10-20 JP JP24892586A patent/JPS63102501A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0435301A (en) * | 1990-05-28 | 1992-02-06 | A T R Koudenpa Tsushin Kenkyusho:Kk | Active array antenna |
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