JPH01114104A - Plane antenna - Google Patents
Plane antennaInfo
- Publication number
- JPH01114104A JPH01114104A JP27106487A JP27106487A JPH01114104A JP H01114104 A JPH01114104 A JP H01114104A JP 27106487 A JP27106487 A JP 27106487A JP 27106487 A JP27106487 A JP 27106487A JP H01114104 A JPH01114104 A JP H01114104A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- board
- ground conductor
- amplification device
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 33
- 230000003321 amplification Effects 0.000 claims abstract description 24
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 24
- 230000005855 radiation Effects 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101100480488 Rattus norvegicus Taar8c gene Proteins 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は、衛星放送を受信する平面アンテナに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a flat antenna for receiving satellite broadcasting.
［背景技術Ｊ
一般に、衛星放送を受信する受信システムは、第５図に
示すように、平面アンテナ本体１およびダウンコンバー
タ２よりなる平面アンテナ３と、チューナ４と、テレビ
ジａン受像ｒ！１５とで栖成されている。ここに、テレ
ピノａン受像機５で再生される受ｆｆ１Ｎ像の状態は、
チューナ４に入力される入力信号レベル（Ｃ／Ｎ）によ
って大きな影響を受け、１６図に示すように、入力信号
レベル（Ｃ／Ｎ）が９ｄＢ（スレッシ９ルドレベル）以
下になると総合ＳＮ比が急激に劣化して画像が極端に悪
くなる。この関係は、
Ｃ／Ｎ＝Ｇ／Ｔ＋ＥＩＲＰ−５１，５［ｄＢ］で導かれ
る。ここに、ＥＩＲＰは、放送衛星の送信電力と、受信
点方向への送信アンテナの利得との積で表される数値（
受信電界強度）であり、アンテナ性能指数Ｇ／Ｔは、
の関係式で表され、Ｇは平面アンテナ本体１の利得、Ｔ
ａ／Ｑ、はアンテナ自身のもつアンテナ雑音、（１−１
／り２９０は＃電線から出る給電線雑音、（ＮＦ−１）
Ｘ２９０はダウンコンバータ２の発生するコンバータ雑
音である。[Background Art J Generally, as shown in FIG. 5, a receiving system for receiving satellite broadcasting includes a flat antenna 3 consisting of a flat antenna main body 1 and a down converter 2, a tuner 4, and a TV receiver. It has been established with 15. Here, the state of the received ff1N image reproduced on the television receiver 5 is as follows.
It is greatly affected by the input signal level (C/N) input to the tuner 4, and as shown in Figure 16, when the input signal level (C/N) becomes 9 dB (threshold level) or less, the overall S/N ratio suddenly decreases. The image deteriorates and the image becomes extremely poor. This relationship is derived as follows: C/N=G/T+EIRP-51,5 [dB]. Here, EIRP is a numerical value (
(received electric field strength), and the antenna performance index G/T is expressed by the following relational expression, where G is the gain of the planar antenna body 1, and T
a/Q is the antenna noise of the antenna itself, (1-1
/290 is the feed line noise coming from the # electric wire, (NF-1)
X290 is converter noise generated by the down converter 2.
以上の関係式から明らかなように、チューナ４に入力さ
れる入力信号レベル（Ｃ／Ｎ）を高くシヨうとすれば、
アンテナ利得Ｇを大きくするか、各雑音（アンテナ雑音
、給電線雑音１．コンバータ雑音）を小さくすれば良い
ことが分かる。ところが、アンテナ雑音（Ｔａ１０．）
は、アンテナの種類（パラボラ型、アレー型など）によ
ってほぼ決定され、給電線雑音（（１−１／の）Ｘ２９
０）は使用材料によって決定されるので、満足できる受
ｇｉ媚像を得るだめには、アンテナの受信面積を広くし
てアンテナ利得Ｇを大きくするか、ダウンコンバータ２
の雑音指数ＮＦを小さくしてコンバータ雑音を少なくす
るしかない。As is clear from the above relational expression, if you want to increase the input signal level (C/N) input to the tuner 4,
It can be seen that either the antenna gain G should be increased or each noise (antenna noise, feed line noise 1, converter noise) should be reduced. However, antenna noise (Ta10.)
is almost determined by the type of antenna (parabolic type, array type, etc.), and is determined by the feed line noise ((1-1/)X29
0) is determined by the materials used, so in order to obtain a satisfactory reception image, either the receiving area of the antenna must be widened to increase the antenna gain G, or the down converter 2
The only way to reduce the converter noise is to reduce the noise figure NF of the converter.
例えば、満足できる受信画像を得るために入力信号レベ
ルＣ／Ｎ＝１４ｄＢが必要である場合には、雑音指数Ｎ
Ｆ、７ンテナ利得Ｇのいずれかが決定されれば、他方も
決まることになる。ここに、７ンテナ利得Ｇは、第７図
（但し、パラボラ７ンテナの直径りとアンテナ利得Ｇの
関係）に示すように、アンテナの直径りが大きくなる（
平面アンテナの場合はアレー数を多くして受信面積を広
くする）にしたがって高（なるが、アンテナの受信面積
が広くなると、アンテナ本体が大形化して重量が大きく
なってアンテナの設置工事が面倒になり、一般家庭での
使用に不都合が生じる。したがって、アンテナの受信面
積はで終るだけ小さいものが望まれ、その分だけダウン
コンバータ２の雑音指数ＮＦを低くすることが要求され
る。For example, if an input signal level C/N=14 dB is required to obtain a satisfactory received image, the noise figure N
If either F or 7 antenna gain G is determined, the other will also be determined. Here, as shown in Figure 7 (however, the relationship between the diameter of the parabolic 7 antenna and the antenna gain G), the 7 antenna gain G increases as the diameter of the antenna increases (
In the case of a planar antenna, the number of arrays increases to widen the reception area.However, as the reception area of the antenna increases, the antenna itself becomes larger and heavier, making installation work of the antenna more troublesome. Therefore, the receiving area of the antenna is desired to be as small as possible, and the noise figure NF of the down converter 2 is required to be reduced accordingly.
ところで、ダウンコンバータ２は複数の能動回路によっ
て構成されるが、第８図に示すようにｎ個の１１１！動
回路Ｃ，，Ｃ２・・・・・・Ｃｎが直列接続されている
場合には、その装置全体の雑音指数ＮＦはＮ Ｆ ＝Ｆ
、＋（Ｆ２−１）／Ｇ、＋（Ｆ、−１）／に、Ｇ２＋・
・・・＝ （Ｆｎ １ ）／ Ｇ ＋ Ｇ２ ・・・
Ｇｎとなり、装置全体のＮＦは初段の能！＃回路（７ａ
ントエンドのローノイズアンプ）Ｃ０のＮＦによって大
きく左右され、初段の能動回路Ｃ９本での損失が小さい
方が装置全体のＮＦが小さくなる。したがって、受信面
積の小さい平面アンテナ本体１を用いて同じ入力信号レ
ベルＣ／Ｎを得るためには、雑音指数ＮＦの小さい初段
の能動回路Ｃ１を損失の少ない状態で使用するのが望ま
しいことが分かる。しかしながら、従来例にあっては、
第９図に示すように、平面アンテナ本体１と、ダウンコ
ンバータ２とをコネクタ２ｇを介して接続しており、し
かも、ダウンコンバータ２の初段の能動回路であるロー
ノイズアンプの増幅デバイス（例えば、ＧａＡｓＦＥＴ
、ＨＥＭＴなど）が最小の雑音指数ＮＦで動作するよう
な使用状態が実現されていなかったので、受信面積の小
さい平面アンテナ本体１を用いた場合には、満足できる
受信画像を得るための受信性能が得られないという問題
があった。Incidentally, the down converter 2 is composed of a plurality of active circuits, and as shown in FIG. 8, there are n 111! When the dynamic circuits C,, C2...Cn are connected in series, the noise figure NF of the entire device is N F =F
, +(F2-1)/G, +(F,-1)/, G2+・
... = (Fn 1) / G + G2 ...
Gn, and the NF of the entire device is the first stage of Noh! #Circuit (7a
The NF of the low noise amplifier (low noise amplifier at the end) is greatly influenced by the NF of C0, and the smaller the loss in the nine first-stage active circuits, the smaller the NF of the entire device. Therefore, it can be seen that in order to obtain the same input signal level C/N using the planar antenna body 1 with a small reception area, it is desirable to use the first stage active circuit C1 with a small noise figure NF in a state with little loss. . However, in the conventional example,
As shown in FIG. 9, the planar antenna main body 1 and the down converter 2 are connected via a connector 2g, and the low noise amplifier amplification device (for example, GaAsFET) which is the first stage active circuit of the down converter 2
, HEMT, etc.) has not been realized in a usage condition in which it operates with the minimum noise figure NF, so when using the planar antenna body 1 with a small reception area, the reception performance to obtain a satisfactory reception image has not been achieved. The problem was that it was not possible to obtain
すなわち、コネクタ２ａの特性インピーダンスは一般に
５０Ωとなっているので、平面アンテナ本体１の出力イ
ンピーダンスおよびダウンコンバータ２の入力インピー
ダンスを共に５０Ωとしてコネクタ接続部での反射損失
が生じないようにしているが、ダウンコンバータ２のロ
ーノイズアンプに用いる増幅デバイス（ＧａＡｓＦＥＴ
）の雑音指数特性（ＮＦ特性）は第９図に示すようにな
っており、最良点（ＮＦ＝１．２ｄＢ）は５０Ω付近（
中央部）ではなく、かな゛りずれた位Ｗ１（はぼ２０＋
ｊ２０Ω）になっている、したがって、従来例にあって
は、ダウンコンバータ２のフロントエンドの信号入力部
にインピーダンス整合を行うインピーダンス整合回路を
付加していたが、コネクタ２ａによる損失に加えてイン
ピーダンス整合回路による損失が発生して雑音指数（Ｎ
Ｆ）の劣化を招き、受信性能が悪くなってしまうという
ｒＩＲ題があった。That is, since the characteristic impedance of the connector 2a is generally 50Ω, the output impedance of the planar antenna main body 1 and the input impedance of the down converter 2 are both set to 50Ω to prevent reflection loss at the connector connection part. Amplification device (GaAsFET) used for low noise amplifier of down converter 2
The noise figure characteristics (NF characteristics) of ) are shown in Figure 9, and the best point (NF = 1.2 dB) is around 50Ω (
W1 (about 20 +
Therefore, in the conventional example, an impedance matching circuit for impedance matching was added to the front end signal input section of the down converter 2, but in addition to the loss due to the connector 2a, the impedance matching Loss due to the circuit occurs and the noise figure (N
There was an rIR problem that caused deterioration of F), resulting in poor reception performance.
例えば、１２ＧＨｚ付近で雑音指数ＮＦが１．２ｄＢ程
度の低雑音の増幅デバイスを用いた場合にあっても、実
質的にダウンコンバータ２の雑音指数ＮＦは１，６ｃｌ
Ｂ以上に悪化してしまい、ハイビジョンなどの高画質の
受信画像を得ようとした場合には、十分な受信性能が得
られないので、平面アンテナ本体１の受信面積を大きく
してアンテナ利得Ｇを高くしなければならな（なってし
まうという問題があった。For example, even if a low-noise amplification device with a noise figure NF of about 1.2 dB near 12 GHz is used, the noise figure NF of the down converter 2 is actually 1.6 cl.
If the situation deteriorates to more than B and you try to obtain high-quality received images such as high-definition images, you will not be able to obtain sufficient reception performance, so increase the reception area of the planar antenna body 1 to increase the antenna gain There was a problem that it had to be made expensive.
［発明の目的］
本発明は上記の点に鑑みて為されたものであり、その目
的とするところは、ローノイズアンプの増幅デバイスを
雑音指数が最小の状態で動作させることができ、平面ア
ンテナ本体の受信面積を小さくした場合にあっても十分
な受信性能を得ることができるとともに、構成が簡単で
コストが安い平面７ンテナを提供することにある。[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to enable the amplification device of a low-noise amplifier to operate with a minimum noise figure, To provide a planar 7 antenna that can obtain sufficient reception performance even when the reception area of the antenna is made small, has a simple configuration, and is inexpensive.
［発明の開示］
（楕 成）
本発明は、接地導体板と、給電回路パターンが形成され
た給電回路板と、放射回路パターンが形成された放射回
路板とを適宜間隔をもって積層してサスペンデッドトリ
プレート型の平面アンテナ本体を形成し、接地導体板と
給電回路板との間の間隙に両板と直交するようにローノ
イズアンプ回路が実装され背面に補助接地導体を具備し
た基板を介装し、ローノイズアンプの増幅デバイスの信
号入力端子を基板の給電回路板側端部に設け、上記信号
入力端子を給電回路の給電点に接続するとともに、増幅
デバイスの接地端子を基板に設けられたスルーホールを
介して補助接地導体に接続することにより、ローノイズ
アンプの増幅デバイスを雑音指数が最小の状態で動作さ
せることができ、平面アンテナ本体の受信面積を小さく
した場合にあっても十分な受信性能を得ることができる
とともに、構成が簡単でコストが安い平面アンテナを提
供するものである。[Disclosure of the Invention] (Ellipsis) The present invention provides a suspended tricycle in which a ground conductor plate, a feeder circuit board on which a feeder circuit pattern is formed, and a radiation circuit board on which a radiation circuit pattern is formed are laminated at appropriate intervals. A plate-shaped planar antenna body is formed, and a low-noise amplifier circuit is mounted in the gap between the ground conductor plate and the feeding circuit board so as to be orthogonal to both plates, and a substrate is interposed therein, which has an auxiliary ground conductor on the back side. The signal input terminal of the amplification device of the low-noise amplifier is provided at the end of the power supply circuit board side of the board, and the signal input terminal is connected to the power supply point of the power supply circuit, and the ground terminal of the amplification device is connected to the through hole provided on the board. By connecting to the auxiliary ground conductor through the antenna, the amplification device of the low-noise amplifier can be operated with the lowest noise figure, and sufficient reception performance can be obtained even when the reception area of the planar antenna body is reduced. The present invention provides a planar antenna that is simple in structure and inexpensive.
（実施例１）
第１図お上りＩｊ４２図は本発明一実施例を示すもので
、平面アンテナ本体１と、アンテナ出力を増幅して低周
波数に変換するダウンコンバータ２のａ−／イズ７ンプ
とを一体化したものであり、平面アンテナ本体１は、第
１図に示すように、接地導体板１０と、給電回路パター
ンが形成された給電回路板１１と、放射回路パターンが
形成された放射回路板１２とを適宜間隔１３ａ、１３ｂ
をもって積層してサスペンデッドトリプレート型となっ
ている。また、給電回路板１１お上り放射回路板１２は
、それぞれ回路パターンの導体１１ａ、１２ａを絶縁基
板ｉｉｂ、ｉ２ｂ上に形成するとともに、導体１１ａ、
１２ａ上に絶縁シートｌｌｃ、１２ｃを覆着して形成さ
れている。また、接地導体板１０と給電回路板１１との
間の間隙１３ａには、両板１０．１１と直交するように
ローノイズアンプ回路が実装され背面に補助接地導体１
７を具備した基板１６が介装されており、ローノイズア
ンプの増幅デバイス（例えば、ＧａＡｓＦＥＴ）１５の
信号入力端子であるデート端子１５ｇｆＪｔ基板１６の
給電回路板１１がわの端部に設けられている。このデー
ト端子１５ｇは給電回路の給電点に接続され、増幅デバ
イス１５の接地端子であるソース端子１５ｓは基！Ｒ１
６に設けられたスルーホール１８を介して補助接地導体
１７に接続されている。ここに、実施例では、給電回路
の給電点に接続□される増幅デバイス１５のデート端子
１５．は、給電回路板１１の給電点部分の絶縁シートを
剥離しで露出された導体１１ａに半田付けにて接続され
る。(Example 1) Figure 1 shows an example of the present invention, in which the planar antenna main body 1 and the a-/is 7 amplifier of the down converter 2 which amplifies the antenna output and converts it to a low frequency are shown. As shown in FIG. 1, the planar antenna main body 1 includes a ground conductor plate 10, a feed circuit board 11 on which a feed circuit pattern is formed, and a radiation conductor plate on which a radiation circuit pattern is formed. The circuit board 12 is spaced appropriately between 13a and 13b.
They are stacked together to form a suspended triplate type. Further, the feeding circuit board 11 and the radiation circuit board 12 have conductors 11a, 12a of circuit patterns formed on insulating substrates iib, i2b, respectively, and conductors 11a,
It is formed by covering insulation sheets llc and 12c on 12a. In addition, a low noise amplifier circuit is mounted in the gap 13a between the ground conductor plate 10 and the power supply circuit board 11 so as to be orthogonal to both plates 10.11, and an auxiliary ground conductor 1 is mounted on the back side.
7 is interposed, and a date terminal 15, which is a signal input terminal of the amplification device (for example, GaAsFET) 15 of the low noise amplifier, is provided at the end of the feeder circuit board 11 of the board 16. . This date terminal 15g is connected to the power supply point of the power supply circuit, and the source terminal 15s, which is the ground terminal of the amplification device 15, is connected to the power supply point of the power supply circuit. R1
It is connected to an auxiliary ground conductor 17 via a through hole 18 provided in 6. Here, in the embodiment, the date terminal 15. of the amplification device 15 connected to the power supply point of the power supply circuit. is connected by soldering to the conductor 11a exposed by peeling off the insulating sheet at the feeding point portion of the feeding circuit board 11.
また、増幅デバイス１５のデート端子１５ｇにはデート
バイアス供給線路１９ａを介して負のバイアス電圧が印
加され、ドレイン端子１５ｄにはドレインバイアス供給
線路１９＆を介して正のバイアス電圧が印加されるよう
になっており、両バイアス電圧は増幅デバイス１５が雑
音指数ＮＦの最も低い値で動作するように設定される。Further, a negative bias voltage is applied to the date terminal 15g of the amplifying device 15 via the date bias supply line 19a, and a positive bias voltage is applied to the drain terminal 15d via the drain bias supply line 19&. Both bias voltages are set so that the amplification device 15 operates at the lowest value of the noise figure NF.
さらにまた、ＧａＡｓＦＥＴよりなる増幅デバイス１５
の雑音指数ＮＦが最低で動作する点の入力インピーダン
スは、（２０＋ｊ２０）Ω付近になっているため、給電
回路の給電、？ｆ、のインピーダンスを予め上記入力イ
ンピーダンスになるように給電回路パターンを設計（必
要に応じてインピーダンス変換パターンを形成）してい
る。なお、出力線路１９ｃは、出力コネクタ２０の芯線
２０ａに接続され、出力コネクタ２０にダウンコンバー
タ２が接続される。Furthermore, an amplification device 15 made of GaAsFET
Since the input impedance at the point where the noise figure NF operates at its lowest is around (20+j20)Ω, the power supply of the power supply circuit, ? A power supply circuit pattern is designed in advance so that the impedance of f is set to the above input impedance (an impedance conversion pattern is formed as necessary). Note that the output line 19c is connected to the core wire 20a of the output connector 20, and the down converter 2 is connected to the output connector 20.
この場合、ダウンコンバータ２の７０ントエンドのロー
ノイズアンプが省略できることは言うまでもない。In this case, it goes without saying that the 70-ton end low noise amplifier of the down converter 2 can be omitted.
いま、実施例にあっては、アンテナ出力を増幅するロー
ノイズアンプの増幅デバイス１５の信号入力端子である
デート端子１５ｇを給電回路の給電点にコネクタを使用
せずに直接接続しているので、コネクタ接続している従
来例に比べて損失が少なくなり、しかも、コネクタの特
性インピーダンスに合わせるためのインピーダンス整合
回路が不要になるので、ローノイズアンプの増幅デバイ
ス１５を雑音指数ＮＦが最小の状態で動作させることが
できるようになっている。したがって、平面アンテナ本
体１の受信面積を小さくした場合にあっても良好な受信
画像を得ることができ、受信性能の向上を図ることがで
きるようになっている。In the present embodiment, the date terminal 15g, which is the signal input terminal of the amplification device 15 of the low-noise amplifier that amplifies the antenna output, is directly connected to the feed point of the feed circuit without using a connector. Since the loss is reduced compared to the conventional connected example, and an impedance matching circuit for matching the characteristic impedance of the connector is not required, the amplification device 15 of the low-noise amplifier is operated with the noise figure NF at its minimum. It is now possible to do so. Therefore, even when the reception area of the planar antenna main body 1 is made small, a good reception image can be obtained, and reception performance can be improved.
また、背面に補助接地導体１７を具備した基板１６を接
地導体板１０と給電回路板１１との間に介装しており、
この基板１６および補助接地導体１７がスペーサとして
ｍ能するので、接地導体板１０と給電回路板１１との間
隙１３ａを一定に保持するために配設されるスペーサを
省略で終ることになり、構成が簡単になってコストを安
くすることができる。Further, a board 16 having an auxiliary ground conductor 17 on the back side is interposed between the ground conductor plate 10 and the power supply circuit board 11,
Since this board 16 and auxiliary ground conductor 17 function as a spacer, the spacer provided to maintain a constant gap 13a between the ground conductor plate 10 and the power supply circuit board 11 can be omitted, and the configuration can be made easier and lower costs.
（実施例２）
第３図およｌ／’第４図は他の実施例を示すもので、増
幅デバイス１５のデート端子１５ｇを給電回路パターン
の給電、αの導体１１ａに絶縁基板１１ｂを介して対向
させて静電誘導結合せしめたものであり、重なり長さは
受信さ′れるマイクロ波の波長の１／４（λｇ／４）に
設定している。なお、他の構成および動作は実施例１と
全く同一である。(Embodiment 2) Figures 3 and 4 show another embodiment, in which the date terminal 15g of the amplification device 15 is connected to the power supply circuit pattern, and the α conductor 11a is connected to the insulating substrate 11b. The overlapping length is set to 1/4 (λg/4) of the wavelength of the microwave to be received. Note that the other configurations and operations are completely the same as in the first embodiment.
いま、本実施例にあって−は、増幅デバイス１５のデー
ト端子１５ｇと給電回路パターンの給電点の導体１１ａ
との接続を非接触で静電誘導結合によって行っているの
で、半田付は作業が不要になって組み立てが容易にでき
、しかも、給電回路板１１の給電回路パターンを形成す
る導体１１ｍとして、銅よりも安価で腐食に対して強い
アルミニウムを用いた場合における接続が容易に行える
ことになる。In this embodiment, - indicates the date terminal 15g of the amplifying device 15 and the conductor 11a at the feeding point of the feeding circuit pattern.
Since the connection is made by electrostatic inductive coupling without contact, there is no need for soldering and assembly is easy.Moreover, copper is used as the conductor 11m that forms the power supply circuit pattern of the power supply circuit board 11. This means that connections can be easily made using aluminum, which is cheaper and more resistant to corrosion.
° ［発明の効果］
本発明は上述のように、接地導体板と、給電回路パター
ンが形成された給電回路板と、放射回路パターンが形成
された放射回路板とを適宜間隔をもって積層してサスペ
ンデッドトリプレート型の平面アンテナ本体を形成し、
接地導体板と給電回路板との間の間隙に両板と直交する
ようにローノイズアンプ回路が実装され背面に補助接地
導体を具備した基板を介装し、ローノイズアンプの増幅
デバイスの信号入力端子を基板の給電回路板ｇＡ端部に
設け、上記信号入力端子を給電回路の給電点に接続する
とともに、増幅デバイスの接地端子を基板に設けられた
スルーホールを介して補助接地導体に接続したものであ
り、ローノイズアンプの増幅デバイスを雑音指数が最小
の状態で動作させることができ、平面アンテナ本体の受
信面積を小さくした場合にあっても十分な受信性能を得
ることができるとともに、構成が簡単でコストが安い平
面アンテナを提供することができるという効果がある。° [Effects of the Invention] As described above, the present invention provides a suspended structure in which a grounding conductor plate, a feeding circuit board on which a feeding circuit pattern is formed, and a radiation circuit board on which a radiation circuit pattern is formed are stacked at appropriate intervals. Forming a triplate-type planar antenna body,
A low-noise amplifier circuit is mounted in the gap between the ground conductor board and the power supply circuit board so as to be perpendicular to both boards, and a board with an auxiliary ground conductor on the back is interposed, and the signal input terminal of the amplification device of the low-noise amplifier is connected to the board. It is provided at the end of the power supply circuit board gA of the board, and the signal input terminal is connected to the power supply point of the power supply circuit, and the ground terminal of the amplification device is connected to the auxiliary ground conductor via a through hole provided in the board. This allows the amplification device of the low-noise amplifier to operate with the minimum noise figure, provides sufficient reception performance even when the receiving area of the planar antenna body is reduced, and has a simple configuration. This has the effect of being able to provide a low-cost planar antenna.
第１図は本発明一実施例の要部拡大断面図、第２図は同
上の要部斜視図、第３図は他の実施例の要部拡大断面図
、第４図は衛星放送受信システムの概略構成図、第５図
乃至第７図は同上の！ｈ作説明図、第８図は従来例の概
略構成図、第９図は同上の動作説明図である。
１は平面アンテナ本体、２はダウンコンバータ、３は平
面アンテナ、１０は接地導体板、１１は給電回路板、１
２は放射回路板、１３ａ、１３ｂは間隙、１５は増幅デ
バイス、１５ｓは接地端子（ソース端子）、１５ｃｒｌ
ｊ：信号入力端子（デート端子）、１６は基板、１７は
補助接地導体、１８はスルーホールである。
第１図
第２図
第３図
第４図
第５図
第６図
第７図
第８図
第９図
手続補正書（自発）
昭和６２年１２月４日 口Fig. 1 is an enlarged sectional view of the main part of one embodiment of the present invention, Fig. 2 is a perspective view of the main part of the same as above, Fig. 3 is an enlarged sectional view of the main part of another embodiment, and Fig. 4 is a satellite broadcast receiving system. The schematic configuration diagrams of Figures 5 to 7 are the same as above! FIG. 8 is a schematic configuration diagram of a conventional example, and FIG. 9 is an explanatory diagram of the same operation. 1 is a planar antenna main body, 2 is a down converter, 3 is a planar antenna, 10 is a ground conductor plate, 11 is a feeding circuit board, 1
2 is a radiation circuit board, 13a and 13b are gaps, 15 is an amplification device, 15s is a ground terminal (source terminal), 15crl
j: signal input terminal (date terminal), 16 is a board, 17 is an auxiliary ground conductor, and 18 is a through hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Procedural amendment (voluntary) December 4, 1988 Mouth
Claims (2)
電回路板と、放射回路パターンが形成された放射回路板
とを適宜間隔をもって積層してサスペンデッドトリプレ
ート型の平面アンテナ本体を形成し、接地導体板と給電
回路板との間の間隙に両板と直交するようにローノイズ
アンプ回路が実装され背面に補助接地導体を具備した基
板を介装し、ローノイズアンプの増幅デバイスの信号入
力端子を基板の給電回路板がわの端部に設け、上記信号
入力端子を給電回路の給電点に接続するとともに、増幅
デバイスの接地端子を基板に設けられたスルーホールを
介して補助接地導体に接続したことを特徴とする平面ア
ンテナ。(1) A suspended triplate planar antenna body is formed by laminating a ground conductor plate, a feeding circuit board on which a feeding circuit pattern is formed, and a radiation circuit board on which a radiation circuit pattern is formed, at appropriate intervals; A low-noise amplifier circuit is mounted in the gap between the ground conductor board and the power supply circuit board so as to be perpendicular to both boards, and a board with an auxiliary ground conductor on the back is interposed, and the signal input terminal of the amplification device of the low-noise amplifier is connected to the board. The signal input terminal is connected to the power supply point of the power supply circuit, and the ground terminal of the amplification device is connected to the auxiliary ground conductor through a through hole provided in the board. A flat antenna characterized by:
板を形成するとともに、増幅デバイスの信号入力端子を
給電回路パターンの給電点の導体に絶縁基板を介して対
向させて静電誘導結合せしめたことを特徴とする特許請
求の範囲第１項記載の平面アンテナ。(2) A power supply circuit board is formed by arranging a power supply circuit pattern on an insulating substrate, and the signal input terminal of the amplification device is faced to the conductor at the power supply point of the power supply circuit pattern through the insulating substrate for electrostatic inductive coupling. The planar antenna according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27106487A JPH0687525B2 (en) | 1987-10-27 | 1987-10-27 | Planar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27106487A JPH0687525B2 (en) | 1987-10-27 | 1987-10-27 | Planar antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01114104A true JPH01114104A (en) | 1989-05-02 |
| JPH0687525B2 JPH0687525B2 (en) | 1994-11-02 |
Family
ID=17494892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27106487A Expired - Lifetime JPH0687525B2 (en) | 1987-10-27 | 1987-10-27 | Planar antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687525B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283823B1 (en) | 1992-06-03 | 2001-09-04 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
-
1987
- 1987-10-27 JP JP27106487A patent/JPH0687525B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283823B1 (en) | 1992-06-03 | 2001-09-04 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
| US6306007B1 (en) | 1992-06-03 | 2001-10-23 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
| US6450861B2 (en) | 1992-06-03 | 2002-09-17 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
| US6585558B1 (en) | 1992-06-03 | 2003-07-01 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
| US6616511B2 (en) | 1992-06-03 | 2003-09-09 | Hitachi, Ltd. | Rolling mill equipped with on-line roll grinding system and grinding wheel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0687525B2 (en) | 1994-11-02 |
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