JPS58103204A - Antenna device - Google Patents

Antenna device

Info

Publication number
JPS58103204A
JPS58103204A JP20194681A JP20194681A JPS58103204A JP S58103204 A JPS58103204 A JP S58103204A JP 20194681 A JP20194681 A JP 20194681A JP 20194681 A JP20194681 A JP 20194681A JP S58103204 A JPS58103204 A JP S58103204A
Authority
JP
Japan
Prior art keywords
antenna
attenuator
shifter
phase shifter
sub
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
Application number
JP20194681A
Other languages
Japanese (ja)
Other versions
JPH0119643B2 (en
Inventor
Kenichi Kagoshima
憲一 鹿子嶋
Motoo Mizusawa
丕雄 水沢
Mizuho Yamamae
山前　瑞穂
Yasuo Takamatsu
高松　泰男
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.)
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph and Telephone 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 Mitsubishi Electric Corp, Nippon Telegraph and Telephone Corp filed Critical Mitsubishi Electric Corp
Priority to JP20194681A priority Critical patent/JPS58103204A/en
Publication of JPS58103204A publication Critical patent/JPS58103204A/en
Publication of JPH0119643B2 publication Critical patent/JPH0119643B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
    • H01Q3/46—Active lenses or reflecting arrays

Landscapes

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

Abstract

PURPOSE:To eliminate the necessity to move an antenna although a disturbance wave source varies its direction, by setting a secondary array antenna so that its opening coincides approximately at a part of the inner surface of a reflector and controlling a phase shifter and an attenuator provided within the antenna. CONSTITUTION:The greater part of the electric wave radiated from a primary radiator 10 is reflected by a parabola reflector 11 to have an equal phase on the opening surface and forms a primary beam in the direction of a front. While the electric wave entered a radiation element 12a is reflected on a short-circuited surface 12d after passing through a phase shifter 12b and an attenuator 12c and then radiated through the element 12a after passing again the shifter 12b and the attenuator 12c. Both shifter 12b and attenuator 12c are electronically controlled from outside to give the phase shift and atteuation which are necessary for the electric wave. As a result, the desired radiation directivity is obtained for a secondary array antenna.

Description

【発明の詳細な説明】 この発明はある特定方向からの干渉を軽減するためにア
ンテナのサイドローブを制御することのできるアンテナ
に関するものであシ、さらに詳しくいえば１反射鏡を使
用するアンテナにおいて、ある特定方向のサイドローブ
を低くすることのできるアンテナに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna that can control side lobes of the antenna in order to reduce interference from a certain direction, and more specifically relates to an antenna that uses one reflecting mirror. , relates to an antenna that can reduce side lobes in a specific direction.

従来のこの種アンテナとして受信アンテナの場合を例に
とると第１図に示すように主アンテナの他に干渉波源の
方向に主放射方向を向けた副アンテナを設け、主アンテ
ナ及び副アンテナで受信した干渉波が打消しあうように
合成することにより、見かけ土庄アンテナの干渉波源の
方向のサイドローブを低くなるようにしていたすなわち
、第１図において、干渉波源の方向に主放射方向を向け
た副アンテナ（２）で受信された干渉波は可変減衰器（
３）と可変移相器（４）を通り、合成回路（５）で、主
アンテナ（１）の干渉波源方向のサイドローブで受信さ
れた干渉波と合成される。この時９合成回路（５）の出
力（６）で干渉波出力が零になるように可変減衰器（３
）と可変移相器（４）を調整しておけば、干渉波の出力
社なく希望波のみが出力（６）にあられれる。Taking the case of a conventional receiving antenna as this type of antenna, as shown in Figure 1, in addition to the main antenna, there is a sub antenna whose main radiation direction is directed toward the interference wave source, and the main antenna and the sub antenna receive signals. By combining the interference waves so that they cancel each other out, the side lobe of the apparent Tonosho antenna in the direction of the interference wave source is lowered. The interference wave received by the sub antenna (2) is transmitted through a variable attenuator (
3) and a variable phase shifter (4), and is combined with the interference wave received by the side lobe of the main antenna (1) in the direction of the interference wave source in the combining circuit (5). At this time, the variable attenuator (3
) and the variable phase shifter (4), only the desired wave can appear at the output (6) without any interference wave output.

しかしながら、第１図に示すような構成では、主アンテ
ナ（１）と合成回路（５）及び副アンテナ（２）と合成
回路（５）の間の電気長を広帯域にわたって一致させる
ことはほとんど不可能にちかく、狭帯域の性能しか得ら
れなかった。また干渉波源の方向が変わった場合には、
副アンテナ（２）の方向を変えるとともに、可変減衰器
（３）と可変移相器（４）を再調整をする必要があると
いう欠点があった。However, with the configuration shown in Figure 1, it is almost impossible to match the electrical lengths between the main antenna (1) and the combining circuit (5) and between the auxiliary antenna (2) and the combining circuit (5) over a wide band. Unfortunately, only narrowband performance was obtained. Also, if the direction of the interference wave source changes,
There was a drawback that it was necessary to change the direction of the sub-antenna (2) and readjust the variable attenuator (3) and variable phase shifter (4).

この発明はこれらの欠点を解決するためＫ。This invention aims to solve these drawbacks.

副アンテナを反射形７エイズドアレイアンテナ構成とし
、その開口が主アンテナの反射鏡の内面の一部にはソ一
致するように設置して、主アンテナの一次放射器からの
放射波の一部を利用することによ〕９合成回路を不用と
し、またフェイズドアレイアンテナ内の移相器、減衰器
を制御することによシ、干渉波源の方向が変わってもア
ンテナを動かすことなく対応できるようにしたもので、
以下図面について詳細に説明する。The secondary antenna is configured as a reflective 7-aided array antenna, and its aperture is installed so that it coincides with a part of the inner surface of the reflector of the main antenna, so that a part of the radiation waves from the primary radiator of the main antenna is By using the 9 synthesis circuit], and by controlling the phase shifter and attenuator in the phased array antenna, it is possible to respond to changes in the direction of the interference wave source without moving the antenna. I made it to
The drawings will be explained in detail below.

第２図はこの発明の一実施例であって、Ｑ［Ｉ（’、−
次放射器、　Ｑｌ）はパラボラ反射鏡、６２は反射形フ
ェイズドアレイ構成の副プレイアンテナ、（１２ａ）は
放射素子であって、鏡面の一部を切欠いた部分にはめ込
むような形で取り付けられ、鏡面と＃？Ｅソ面一になっ
ている。（ｔｚｂ）は移相器。FIG. 2 shows an embodiment of the present invention, in which Q[I(', -
The secondary radiator, Ql) is a parabolic reflector, 62 is a sub-play antenna having a reflective phased array configuration, and (12a) is a radiating element, which is attached in such a way that it fits into a part of the mirror surface cut out. Mirror surface and #? It's all over E-So. (tzb) is a phase shifter.

（１２ｃ　）は減衰器、　　（１２ｄ）は反射のだめの
短絡面であシ、上記反射鏡の背面において上記放射素子
の上に階層状に取シ付けである。第８図は第２図の正面
図である。(12c) is an attenuator, and (12d) is a short-circuit surface of a reflection reservoir, which is mounted in a layered manner on the radiating element on the back surface of the reflecting mirror. FIG. 8 is a front view of FIG. 2.

図において、−次放射器α〔から放射された電波は大部
分はパラボラ反射鏡（ｌυで反射されて。In the figure, most of the radio waves emitted from the -order radiator α are reflected by the parabolic reflector (lυ).

開口面で等位相となシ、正面方向に主ビームを形成する
。一方放射素子（１２ａ）へ入射した電波は移相器（１
２ｂ）と減衰器（１２ｃ）を通シ、短絡面（１２ｄ）で
反射されて、再び減衰器（１２ｃ）と移相器（１２ｂ）
を通り、放射素子（１２ａ）よシ放射される。前記移相
器（１２ｂ）と減衰器（１２ｃ）を外部から電子制御し
て、電波に必要な位相推移と減衰を与えることＫより、
副プレイアンテナａ■として希望する放射指向性を得る
ことができる。また副アレイアンテナ仁りの放射指向性
の方向のみを変化する場合には減衰器（１２ｃ）はあら
かじめ設定した固定の減衰器でよく又は使用しなくても
よい。したがって、副アレイアンテナ＠以外の反射鏡面
（Ｉυからの放射電波の指向性において、ある特定の方
向のサイドロープを干渉のため低くしたい場合には、副
アレイアンテナの指向性の主ビームを前記サイドロープ
の方向に向けて、振幅を一致させて９位相を逆相にする
ことにより実現できる。副アレイアンテナ＋１１の大き
さは、主アンテナのサイドロープのうち、干渉を避ける
だめに低くしようとする方向、レベルによシ決まる。通
常のパラボラアンテナにおいては、サイドロニブレベル
は約−２５ｄＢ以下であるので、パラボラ反射鏡αＤに
対して、副アレイアンテナ輪の大きさは相当に小さくす
ることができ、構成上及び構造上の問題はない。The main beam is formed in the front direction with the same phase at the aperture plane. On the other hand, the radio waves incident on the radiating element (12a) are transmitted through the phase shifter (1
2b) and the attenuator (12c), is reflected at the short-circuit surface (12d), and then passes through the attenuator (12c) and the phase shifter (12b) again.
and is radiated from the radiating element (12a). From K, electronically controlling the phase shifter (12b) and the attenuator (12c) from the outside to provide the necessary phase shift and attenuation to the radio waves,
The desired radiation directivity can be obtained as the sub-play antenna a. Further, when only the direction of the radiation directivity of the sub-array antenna beam is changed, the attenuator (12c) may be a fixed attenuator set in advance or may not be used. Therefore, in the directionality of the radiated radio waves from the reflecting mirror surface (Iυ) other than the sub-array antenna @, if you want to lower the side rope in a certain direction due to interference, the main beam of the directionality of the sub-array antenna This can be achieved by matching the amplitudes and making the 9 phases opposite in the direction of the rope.The size of the sub array antenna +11 is set to be lower than the side ropes of the main antenna to avoid interference. It depends on the direction and level.In a normal parabolic antenna, the sideronib level is about -25 dB or less, so the size of the sub-array antenna ring can be made considerably smaller than the parabolic reflector αD. There are no structural or structural problems.

以上説明したように、この発明によれば、従来主アンテ
ナの他に副アンテナを設置し、この両アンテナ間の干渉
波に対する振幅及び位相を調整して合成する回路を必要
としていたものが、パラボラ反射鏡内の一部に副アレイ
アンテナを設け、このアンテナを反射形フェイズドアレ
イアンテナとすることによシ、振幅及び位相を調整して
合成する回路が不要となシまたサイドロープを低くした
い方向を変える場合に副プレイアンテナ内の移相器及び
減衰器を外部から電子的に制御するだけでよく、アンテ
ナの設置方向を変えるといったことは必要ないという利
点がある。さらに副アレイアンテナの各放射素子の開口
はパラボラ反射鏡面にハソ一致して配置しているので給
電線路が不用であシ、さらに移相器、減衰器の長さも短
かくすることにより。As explained above, according to the present invention, a parabolic antenna that conventionally required a sub-antenna installed in addition to the main antenna and a circuit for adjusting and synthesizing the amplitude and phase of interference waves between both antennas can be replaced with a parabolic antenna. By providing a sub-array antenna in a part of the reflector and making this antenna a reflective phased array antenna, there is no need for a circuit to adjust and synthesize the amplitude and phase, and it is also suitable for the direction in which the side rope is desired to be lowered. When changing the antenna, it is only necessary to electronically control the phase shifter and attenuator in the sub-play antenna from the outside, and there is an advantage that there is no need to change the installation direction of the antenna. Furthermore, since the aperture of each radiating element of the sub-array antenna is arranged to coincide with the parabolic reflecting mirror surface, there is no need for a feed line, and the lengths of the phase shifter and attenuator are also shortened.

副アレイアンテナからの放射波の位相の周波数特性は、
主アンテナの周波数特性にちかくでき、広帯域な特性が
得られるという利点がある。The frequency characteristics of the phase of the radiation wave from the sub array antenna are:
It has the advantage of being able to approximate the frequency characteristics of the main antenna and providing wideband characteristics.

なお１以上の説明はパラボラアンテナの一実施例につい
て説明したが１反射鏡を使用する他の形式のアンテナ、
たとえばホーンリフレクタアンテナ、カセグレンアンテ
ナ、オフセットアンテナ等に対しても、同様に実施する
ことにより、同じ効果が得られる。Although the above description has been made regarding one embodiment of a parabolic antenna, other types of antennas using one reflector,
For example, the same effect can be obtained by applying the same method to a horn reflector antenna, a Cassegrain antenna, an offset antenna, etc.

このようにこの発明による干渉波を軽減することのでき
るアンテナ装置は簡単にサイドロ−プを低くしたい方向
を変えることができ、また広帯域な特性を得ることがで
きるもので、実用上の価値は大きい。As described above, the antenna device according to the present invention that can reduce interference waves can easily change the direction in which the side lobe is desired to be lowered, and can also obtain broadband characteristics, so it has great practical value. .

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のアンテナ装置を示す構成図。 第２図はこの発明によるアンテナ装置の一実施例を示す
断面図、ｇａ図は第２図のアンテナ装置の正面図である
。 １１１・・・主アンテナ、（２）・・・副アンテナ、（
３）・・可変減衰器、（４）・・・可変移相器、ａＩ・
・・−次放射器、　ａｌ・・・反射鏡、αオ・・・副ア
レイアンテナ、　　（１２ｍ）・・・放射素子、　　（
１２ｂ）・・・移相器、　　（１２ｃ）・・・減衰器、
（１２ｄ）・・・短絡面 なお１図中同一あるいは相当部分には同一符号を付して
示しである。 代理人　　葛　野　信　− ４，３２ 第２図 第３図 ７、　胴■−１ −／２FIG. 1 is a configuration diagram showing a conventional antenna device. FIG. 2 is a sectional view showing an embodiment of the antenna device according to the present invention, and FIG. GA is a front view of the antenna device of FIG. 2. 111...Main antenna, (2)...Sub antenna, (
3)...variable attenuator, (4)...variable phase shifter, aI.
...-order radiator, al...reflector, αo...sub-array antenna, (12m)...radiating element, (
12b)...phase shifter, (12c)...attenuator,
(12d)...Short-circuit surface Note that the same or corresponding parts in FIG. 1 are designated by the same reference numerals. Agent Shin Kuzuno - 4, 32 Figure 2 Figure 3 7, Torso ■-1 -/2

Claims (1)

【特許請求の範囲】[Claims] 電波を放射又は受信する一次放射器と、この−次放射器
に対向して設けられ、電波を反射させる反射鏡と、この
反射鏡面内の一部に、鏡面とほぼ面一に設けた放射素子
、及びこの放射素子に階層状に取シ付けた移相器、減衰
器、短絡兜構成した複数のプレイ素子とから構成したこ
とを特徴とするアンテナ装置。A primary radiator that emits or receives radio waves, a reflecting mirror that is provided opposite to this secondary radiator and reflects radio waves, and a radiating element that is provided in a part of this reflecting mirror surface almost flush with the mirror surface. , and a plurality of play elements configured as a phase shifter, an attenuator, and a short-circuit helmet, which are attached to the radiating element in a hierarchical manner.
JP20194681A 1981-12-15 1981-12-15 Antenna device Granted JPS58103204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20194681A JPS58103204A (en) 1981-12-15 1981-12-15 Antenna device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20194681A JPS58103204A (en) 1981-12-15 1981-12-15 Antenna device

Publications (2)

Publication Number Publication Date
JPS58103204A true JPS58103204A (en) 1983-06-20
JPH0119643B2 JPH0119643B2 (en) 1989-04-12

Family

ID=16449390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20194681A Granted JPS58103204A (en) 1981-12-15 1981-12-15 Antenna device

Country Status (1)

Country Link
JP (1) JPS58103204A (en)

Also Published As

Publication number Publication date
JPH0119643B2 (en) 1989-04-12

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