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JPS5910606B2 - 回転対称2反射鏡アンテナ - Google Patents

回転対称2反射鏡アンテナ

Info

Publication number
JPS5910606B2
JPS5910606B2 JP52075388A JP7538877A JPS5910606B2 JP S5910606 B2 JPS5910606 B2 JP S5910606B2 JP 52075388 A JP52075388 A JP 52075388A JP 7538877 A JP7538877 A JP 7538877A JP S5910606 B2 JPS5910606 B2 JP S5910606B2
Authority
JP
Japan
Prior art keywords
reflector
radiator
main reflector
opening
horn
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
Application number
JP52075388A
Other languages
English (en)
Other versions
JPS532056A (en
Inventor
ウヴエ・ロイペルト
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Corp
Original Assignee
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of JPS532056A publication Critical patent/JPS532056A/ja
Publication of JPS5910606B2 publication Critical patent/JPS5910606B2/ja
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/18Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
    • H01Q19/19Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Description

【発明の詳細な説明】 本発明は,中央開口を有する主反射器と、主反射器によ
り保持さ九主反射器の中央開口に指向する補助反射器と
,補助反射器を介して主反射器に照射する1次遠距離電
磁界輻射器とを具備し,1次遠距離電磁界輻射器がホー
ン輻射器から成る回転対称2反射鏡アンテナ、例えば6
GHZ (特に1 0 GHz)より高い周波数領域
のためのカセグレンまたはグレコリアンテナに関する。
指向性無線通信または衛星無線通信に対する大アンテナ
として必要なようなこの形式の2反射鏡アンテナは一次
遠距離電磁界励振装置として通例小さなホーン輻射器を
用いる。
この輻射器の自由端部は主反射器の中央の開口を介して
貫通突出しており、即ち主反射器と補助反射器との間に
設けられている。
この種の2反射鏡アンテナは例えばジーメンス・ツアイ
トシュリフト付録“ナーハリヒテンユーバートラーグン
グステヒニーク”(48巻、1974年,第226ペー
ジ〜229ページ)に記載さnている。
主および補助反射器間の一次遠距離電磁界輻射器の装置
は、輻射器と送信一受信装置間に比較的長い伝送路を必
要とする。
装置は大抵主反射器の背面の箱中に存在している。
導波管伝送路の減衰は送信動作の場合に特に不利である
他方受信動作の場合には、導波管伝送路の比較的大きい
減衰の故に、1次遠距離電磁界輻射器の給電部のごく近
傍に(ホーン輻射器を使用する場合にはホーン輻射器の
支持構造体部分の内部に)前置増幅器を設ける必要があ
る。
このようにして前置増幅器を設ければ受信動作の場合に
送・受信装置への導波管伝送路の減衰損失を充分に低減
iることかできるが、前置増幅器への接近が困難になり
、保守と組立上極めて不都合である。
天候の影響に対して誘電薄片で保護さnねばならない一
次遠距離電磁界輻射器の輻射開口(アパーチャ)は雨ま
たは雪に直接さらさnる。
誘電体薄片に水、雪および氷が付着したりすることによ
り、周波数が高い場合信号の反射および吸収により作動
特性の障害および劣化の原因となる。
所謂2重周波数利用のアンテナに胚いてはこの状態は特
に障害となる。
自明のようにこの場合申分なく作動するために、交叉偏
波純度に対して高度の要求が満たされない。
この理由から実際は大抵送風機を設けなければならない
送風機を用いて輻射開口を雨乃至雪の付着から保護する
本発明の課題は冒頭に述べた形式の2反射鏡アンテナに
対し、一次遠距離電磁界輻射器との関連において生じる
困難性を大幅に除去する新たな解決法を提供することで
ある。
本発明によnばこの課題は、ホーン輻射器をその開口面
で誘電体薄箔により被覆し、主反射器の頂点開口部の後
方に輻射方向にホーン輻射器を配置し、受信増幅器の入
力端子をホーン輻射器の給電端子の近傍に配置の、閉成
きれた機器箱内に受信増幅器を配置し、機器箱に開口部
を設け、ホーン輻射器の自由端のみが該開口部から突出
するようにしたことにより解決される。
本発明は、6GHz、例えば1 0GHz以上の周波数
において作動する2反射鏡遠距離電磁界アンテナにおい
て、一次遠距離電磁界輻射器を非常に有利な方法で主反
射器の後にも設けることが出来しかも一次遠距離電磁界
輻射器の寸法を許容以上に大きくする必要がないという
認識に基づいている。
それにより一次遠距離電磁界輻射器と送信一受信器の間
の接続が著しく短縮さnる。
更に輻射器の輻射開口は主反射器により大幅に雨や雪に
対して保護される。
このことは衛星回線網に対する地上局アンテナの通例の
仰角が20’と60’との間の境界にあるとき有意義で
ある。
本発明において受信増幅器の入方端子は、一次遠距離電
i界輻射器の給電部の直接近傍に設けられている。
公知の装置において生じる手入れや組立てに対する増幅
器の不利な点はこの場合除去される。
更に一次遠距離電磁界輻射器と受信増幅器のこの種の構
造的な結合の際受信増幅器をアンテナの機器箱の内側に
設けかつホーン輻射器として実現さnる一次遠距離電磁
界輻射器の自由端部だけを開口部を介して機器箱から突
出させる点も有利である。
次に本発明を図示に示す実施例に基づいて詳細に説明す
る。
図は本発明による構成を有した衛星用地上局のカセグレ
ンアンテナの略図である。
アンテナは方位軸AZの周りの運動に対して載置されて
いる回転環2を有するアンテナ基台1から成っている。
回転環上に機器箱を有するアンテナ支持構造部分が設け
られている。
機器箱は送信機5と,ホーンとして実現されている一次
遠距離電磁界輻射器、受信増幅器6を含んでいる。
ホーン7の自由端部は開口部4′を介して機器箱4から
突出している。
アンテナの仰角軸はELで示し、十字と矢印により図示
されている。
主反射器8に対するアンテナー支持構造部は仰角軸EL
のまわりを回転可能である。
主反射器8は中央開口9を有する。この開口を介してホ
ーン1は主反射器8の前に設けられている補助反射器1
0を照射する。
ホーン7はこの場合天候の影響から保護するために、開
口面を薄片で被覆さnている。
図からわかるようにこの被覆部分は主反射器8の中央の
開口部9によって仰角が非常に大きくなる場合だけ雨お
よび雪にさラサれる。
従って一般的に、被覆部を雨や雪から保護する特別な処
置が必要でない。
この種の特別な処置をとらなければならない特別な場合
には本発明の実施例μまた公知の解決法に対して利点を
有する。
その理由はこの場合必要な送風機は主反射器の枠構成部
分に簡単に収納出来るからである。
【図面の簡単な説明】
図は本発明の構成を有する衛星用地上局のカセグレンア
ンテナの略図である。 AZ・・・・・・方位軸、EL・・・・・・仰角軸、5
・・曲送信機、6・・・・・・受信増幅器、7・・・・
・・ホーン、8・・曲主反射器、10・・・・・・補助
反射器。 21一

Claims (1)

    【特許請求の範囲】
  1. 1 中央開口を有する主反射器と、主反射器により保持
    され主反射器の中央開口に指向する補助反射器と、補助
    反射器を介して主反射器忙照射する1次遠距離電磁界輻
    射器とを具備し、1次遠距離電磁界輻射器がホーン輻射
    器から成る回転対称2反射鏡アンテナにおいて、ホーン
    輻射器Tをその開口面で誘電体薄箔により被覆し、主反
    射器8の頂点開口部9の後方に輻射方向にホーン輻射器
    7を配置し、受信増幅器6の入力端子をホーン輻射器7
    の給電端子の近傍に配置し、閉成された機器箱4内に受
    信増幅器6を配置し、機器箱4に開口部4lを設け、ホ
    ーン輻射器7の自由端のみが開口部4′から突出するよ
    うにしたことを特徴とする2反射鏡アンテナ。
JP52075388A 1976-06-25 1977-06-24 回転対称2反射鏡アンテナ Expired JPS5910606B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE000P26287138 1976-06-25
DE2628713A DE2628713C2 (de) 1976-06-25 1976-06-25 Rotationssymmetrische Zweispiegelantenne

Publications (2)

Publication Number Publication Date
JPS532056A JPS532056A (en) 1978-01-10
JPS5910606B2 true JPS5910606B2 (ja) 1984-03-10

Family

ID=5981496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52075388A Expired JPS5910606B2 (ja) 1976-06-25 1977-06-24 回転対称2反射鏡アンテナ

Country Status (17)

Country Link
US (1) US4195302A (ja)
JP (1) JPS5910606B2 (ja)
BE (1) BE856093A (ja)
CA (1) CA1089982A (ja)
CH (1) CH614814A5 (ja)
DE (1) DE2628713C2 (ja)
DK (1) DK281177A (ja)
ES (1) ES460011A1 (ja)
FI (1) FI771968A (ja)
FR (1) FR2356288A1 (ja)
GB (1) GB1586256A (ja)
IE (1) IE45106B1 (ja)
IT (1) IT1078318B (ja)
LU (1) LU77612A1 (ja)
NL (1) NL170903C (ja)
NO (1) NO148310C (ja)
SE (1) SE7707252L (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196244U (ja) * 1983-06-14 1984-12-27 富士重工業株式会社 車両用シ−トベルト
JPS6248863U (ja) * 1985-09-14 1987-03-26
JPH0235012Y2 (ja) * 1983-10-28 1990-09-20

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DE3814276A1 (de) * 1988-04-27 1989-11-09 Siemens Ag Aperturstrahler
US4866457A (en) * 1988-11-08 1989-09-12 The United States Of America As Represented By The Secretary Of Commerce Covered inverted offset cassegrainian system
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FI771968A (ja) 1977-12-26
GB1586256A (en) 1981-03-18
NO772172L (no) 1977-12-28
NL170903B (nl) 1982-08-02
ES460011A1 (es) 1978-04-16
IT1078318B (it) 1985-05-08
NL170903C (nl) 1983-01-03
CA1089982A (en) 1980-11-18
NO148310B (no) 1983-06-06
US4195302A (en) 1980-03-25
SE7707252L (sv) 1977-12-26
NO148310C (no) 1983-09-14
FR2356288B1 (ja) 1981-03-20
FR2356288A1 (fr) 1978-01-20
DE2628713A1 (de) 1977-12-29
NL7707072A (nl) 1977-12-28
IE45106B1 (en) 1982-06-16
DK281177A (da) 1977-12-26
CH614814A5 (ja) 1979-12-14
LU77612A1 (fr) 1979-03-26
DE2628713C2 (de) 1987-02-05
JPS532056A (en) 1978-01-10
BE856093A (fr) 1977-12-27
IE45106L (en) 1977-12-25

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