JPS5852361B2 - antenna with reflector - Google Patents
antenna with reflectorInfo
- Publication number
- JPS5852361B2 JPS5852361B2 JP10962176A JP10962176A JPS5852361B2 JP S5852361 B2 JPS5852361 B2 JP S5852361B2 JP 10962176 A JP10962176 A JP 10962176A JP 10962176 A JP10962176 A JP 10962176A JP S5852361 B2 JPS5852361 B2 JP S5852361B2
- Authority
- JP
- Japan
- Prior art keywords
- array antenna
- scanning
- antenna
- reflector
- convex mirror
- 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
Links
Classifications
-
- 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
- H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2658—Phased-array fed focussing structure
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【発明の詳細な説明】
この発明は、複数個の素子アンテナを配置［ルで構成さ
れ、かつ、電子的にビーム走査するアレイアンテナに対
向して反射鏡を設けてビーム走査を行なう反射鏡付きア
レイアンテナに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an array antenna with a reflecting mirror that is configured with a plurality of element antennas arranged and that performs beam scanning by providing a reflecting mirror opposite to an array antenna that performs beam scanning electronically. This relates to array antennas.
従来、アレイアンテナと反射鏡を組み合わせたアンテナ
においては、上記アレイアンテナを一次放射器とし、い
わゆるパラボラ反射鏡のような凹面鏡を上記アレイアン
テナに対向させたものがあった。Conventionally, in an antenna that combines an array antenna and a reflector, there has been one in which the array antenna is used as a primary radiator and a concave mirror such as a so-called parabolic reflector is opposed to the array antenna.
このようなアンテナはいわゆる開口面アンテナとしての
機能を持ったものであり、一次放射器としてのアレイア
ンテナでの振幅位相分布の制御により、凹面鏡からの反
射ビームの振幅位相分布が制御できた。Such an antenna functions as a so-called aperture antenna, and by controlling the amplitude and phase distribution of the array antenna as a primary radiator, the amplitude and phase distribution of the reflected beam from the concave mirror can be controlled.
しかし、反射鏡からの反射ビームの走査ということに関
して言えば、反射鏡として凹面鏡を用いているために、
したがって、その凹面鏡の持つ光の収束性のために、広
角のビーム走査は不可能であるという欠点があった。However, when it comes to scanning the reflected beam from the reflecting mirror, since a concave mirror is used as the reflecting mirror,
Therefore, due to the light convergence of the concave mirror, wide-angle beam scanning is impossible.
この発明はアレイアンテナに対向させる反射鏡として凸
面鏡を用いることを特徴とし、その目的は反射鏡からの
反射ビームの広角走査を可能ならしめることにある。This invention is characterized by using a convex mirror as a reflecting mirror facing an array antenna, and its purpose is to enable wide-angle scanning of the reflected beam from the reflecting mirror.
以下、この発明をその実施例を示す図によって説明する
。The present invention will be explained below with reference to figures showing embodiments thereof.
図はこの発明を説明するための一実施例の断面図である
。The figure is a sectional view of an embodiment for explaining the present invention.
１は複数個の素子アンテナを配列して構成され、電子的
ビーム走査を行なう円形開口の平面アレイアンテナ、２
は平面アレイアンテナ１に対向して配置された凸面鏡で
ある。1 is a planar array antenna with a circular aperture that is configured by arranging a plurality of element antennas and performs electronic beam scanning; 2;
is a convex mirror placed opposite to the planar array antenna 1.
３は平面アレイアンテナ１の中心線であり、この反射鏡
付きアレイアンテナは中心線３に関して回転対称である
。3 is the center line of the planar array antenna 1, and this array antenna with a reflector is rotationally symmetrical with respect to the center line 3.
４ａ、４ｂ、４ｃは平面アレイアンテナ１の中心より放
射され、凸面鏡２で反射された後の三種類のビーム走査
方向を示す光線であり、波動的には光線４ａ、４ｂ、４
ｃそれぞれは平面アレイアンテナ１からの放射ビームの
方向を代表する。4a, 4b, and 4c are light rays that are emitted from the center of the planar array antenna 1 and indicate three types of beam scanning directions after being reflected by the convex mirror 2;
c each represents the direction of the radiation beam from the planar array antenna 1.
凸面鏡２は光線を発散させる作用があるために、平面ア
レイアンテナ１より放射された光線は図に示されるよう
に、ある場合には光線４ａ方向に、また、他の場合には
光線４ｂあるいは光線４ｃ方向に進んで行くことは明ら
かである。Since the convex mirror 2 has the effect of diverging the light rays, the light rays emitted from the planar array antenna 1 are directed in the direction of the ray 4a in some cases, and in the direction of the ray 4b or the ray in other cases, as shown in the figure. It is clear that it will proceed in the direction of 4c.
この結果、平面アレイアンテナ１での走査履域に比べて
凸面鏡２での反射後の走査履域は広くなり、広角走査が
可能になる。As a result, the scanning footprint after reflection by the convex mirror 2 becomes wider than the scanning footprint by the planar array antenna 1, making wide-angle scanning possible.
また、平面プレイアンテナ１での励振振幅位相分布の制
御および凸面鏡２の表面の整形により、凸面鏡２での反
射後のビームの走査利得を制御することができる。Further, by controlling the excitation amplitude phase distribution in the planar play antenna 1 and shaping the surface of the convex mirror 2, the scanning gain of the beam after reflection on the convex mirror 2 can be controlled.
さらに、中心線３に関して回転対称であるために水平面
内での走査利得は一様である。Furthermore, since it is rotationally symmetrical with respect to the center line 3, the scanning gain in the horizontal plane is uniform.
なお、以上は送信の場合について説明したが、この発明
は受信の場合に用いても構わない。Note that although the case of transmission has been described above, the present invention may also be used in the case of reception.
また、平面アレイアンテナの開口は円形に限らず、６角
形などの多角形でもよく、さらに、平面アレイアンテナ
の代わりに多面または曲面状のアレイアンテナなどを用
いても同様に実施することができる。Furthermore, the aperture of the planar array antenna is not limited to a circular shape, but may be polygonal such as a hexagonal shape. Furthermore, a polygonal or curved array antenna may be used in place of the planar array antenna.
また、凸面鏡は半球でなくてもよく、回転だ固体などの
回転体および一般の曲面などの場合にも同様に実施でき
る。Further, the convex mirror does not have to be a hemisphere, and can be similarly implemented in the case of a rotating body such as a rotating solid or a general curved surface.
さらに、実施例では平面アレイアンテナと凸面鏡が上下
に対向した場合であったが、この発明はこれに限らず、
要求に応じて左右などの方向で対向しても構わない。Further, in the embodiment, the planar array antenna and the convex mirror are vertically opposed to each other, but the present invention is not limited to this.
They may face each other in left and right directions as required.
以上のように、この発明によれば、アレイアンテナに対
向して凸面鏡を配置することによりアレイアンテナでの
走査履域に比べて凸面鏡での反射後の走査履域は広くな
り、したがって、広角走査が可能になり、また、アレイ
アンテナでの励振振幅位相分布の制御および凸面鏡の表
面の整形によりビームの走査利得を制御することができ
るという利点があり、さらに、回転対称形に構成した場
合にはその回転軸に垂直な面内での走査利得は一様にな
るという利点があり、これをレーダ用アンテナなどに用
いた場合にその効果はきわめて太きい。As described above, according to the present invention, by arranging the convex mirror opposite to the array antenna, the scanning footprint after reflection on the convex mirror is wider than that of the array antenna, and therefore wide-angle scanning is possible. It also has the advantage that the beam scanning gain can be controlled by controlling the excitation amplitude phase distribution in the array antenna and shaping the surface of the convex mirror.Furthermore, when configured rotationally symmetrically, It has the advantage that the scanning gain is uniform in a plane perpendicular to the rotation axis, and when used in radar antennas, etc., the effect is extremely large.
図はこの発明の一実施例の断面図であり、１は平面アレ
イアンテナ、２は凸面鏡である。The figure is a sectional view of one embodiment of the present invention, where 1 is a planar array antenna and 2 is a convex mirror.
Claims (1)
ンテナと、上記アレイアンテナに対向して配置された反
射鏡とから成る反射鏡付きアレイアンテナにおいて、上
記反射鏡として凸面鏡を用いたことを特徴とする反射鏡
付きアレイアンテナ。1. An array antenna with a reflector consisting of an array antenna configured by arranging a plurality of element antennas and a reflector placed opposite to the array antenna, characterized in that a convex mirror is used as the reflector. Array antenna with reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10962176A JPS5852361B2 (en) | 1976-09-13 | 1976-09-13 | antenna with reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10962176A JPS5852361B2 (en) | 1976-09-13 | 1976-09-13 | antenna with reflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5335346A JPS5335346A (en) | 1978-04-01 |
| JPS5852361B2 true JPS5852361B2 (en) | 1983-11-22 |
Family
ID=14514922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10962176A Expired JPS5852361B2 (en) | 1976-09-13 | 1976-09-13 | antenna with reflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5852361B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439176U (en) * | 1987-09-03 | 1989-03-08 |
-
1976
- 1976-09-13 JP JP10962176A patent/JPS5852361B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6439176U (en) * | 1987-09-03 | 1989-03-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5335346A (en) | 1978-04-01 |
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