JP2689537B2 - Antenna device - Google Patents
Antenna deviceInfo
- Publication number
- JP2689537B2 JP2689537B2 JP63286228A JP28622888A JP2689537B2 JP 2689537 B2 JP2689537 B2 JP 2689537B2 JP 63286228 A JP63286228 A JP 63286228A JP 28622888 A JP28622888 A JP 28622888A JP 2689537 B2 JP2689537 B2 JP 2689537B2
- Authority
- JP
- Japan
- Prior art keywords
- primary radiator
- antenna device
- reflected
- radio wave
- main reflector
- 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 - Fee Related
Links
Landscapes
- Aerials With Secondary Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はアンテナ装置に関し、特に放射パターンを改
善したオフセットパラボラアンテナ装置に関する。The present invention relates to an antenna device, and more particularly to an offset parabolic antenna device having an improved radiation pattern.
従来、この種のオフセットパラボラアンテナ装置は、
第３図のように主反射鏡1,一次放射器2,支持柱３′，送
受信器４等で構成されており、アンテナ開口上に一次放
射器２と送受信器４等のブロッキングがないことから、
優れたアンテナ能率ならびに低サイドローブ特性を有す
ることが知られている。Conventionally, this type of offset parabolic antenna device is
As shown in Fig. 3, it is composed of the main reflector 1, the primary radiator 2, the support column 3 ', the transceiver 4, etc., and there is no blocking of the primary radiator 2 and the transceiver 4 etc. on the antenna aperture. ,
It is known to have excellent antenna efficiency as well as low sidelobe characteristics.
上述した従来のアンテナ装置においては、主反射鏡１
の焦点と一次放射器２の位相中心を一致させるように一
次放射器2,送受信器４等を支持する支持柱３′は、次の
ような問題が生じている。In the above-described conventional antenna device, the main reflecting mirror 1
The support pillar 3'supporting the primary radiator 2, the transceiver 4 and the like so that the focal point of the primary radiator 2 and the phase center of the primary radiator 2 coincide with each other has the following problems.
即ち、第３図に示した従来の支持柱３′による反射波
の進行方向は、第４図に示すように、一次放射器２より
発せられた電波の一部７′が支持柱３′により反射さ
れ、さらにこの反射波の一部は主反射鏡１により反射さ
れ、反射波８′となりアンテナ放射軸６近傍の空間に放
射される。このようにして反射波８′はアンテナ放射軸
近傍のサイドローブ特性を劣化させることになる。That is, the traveling direction of the reflected wave by the conventional support pillar 3'shown in FIG. 3 is that, as shown in FIG. 4, a part 7'of the radio wave emitted from the primary radiator 2 is caused by the support pillar 3 '. The reflected wave is reflected, and a part of this reflected wave is reflected by the main reflecting mirror 1 to become a reflected wave 8 ', which is radiated to the space near the antenna radiation axis 6. In this way, the reflected wave 8'deteriorates the side lobe characteristic near the antenna radiation axis.
本発明はサイドローブ特性を劣化させることがないア
ンテナ装置を提供することを目的とする。An object of the present invention is to provide an antenna device that does not deteriorate the side lobe characteristics.
本発明のアンテナ装置は、主反射鏡と、これに対向す
る一次放射器と、この一次放射器の位相中心が主反射鏡
の焦点と一致するように一次放射器を固定する一次放射
器支持柱とを有するオフセットパラボラアンテナ装置に
おいて、支持柱を、一次放射器より発せられる電波が投
射される部分の形状を、この投射された電波が前記主反
射鏡に入射されない方向に反射される形状に形成してい
る。The antenna device of the present invention includes a main reflector, a primary radiator facing the main reflector, and a primary radiator support column that fixes the primary radiator so that the phase center of the primary radiator coincides with the focal point of the main reflector. In the offset parabolic antenna device having, a support column is formed in a shape in which a radio wave emitted from a primary radiator is projected in a shape in which the projected radio wave is reflected in a direction not incident on the main reflecting mirror. doing.
上述した構成では、支持柱で反射される電波が主反射
鏡で反射されることがなく、サイドローブ特性の劣化を
防止する。In the above-mentioned configuration, the radio waves reflected by the support columns are not reflected by the main reflecting mirror, and the deterioration of the side lobe characteristics is prevented.
次に、本発明を図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を用いたアンテナ装置の外
観図である。同図において、１は主反射鏡,2は一次放射
器,3は支持柱,4は送受信器を示しており、支持柱３で前
記一次放射器２と送受信器４等を支持している。この支
持柱３は、一次放射器２と送受信器４等を支持した先端
部から主反射鏡１の面に略平行に沿って延設し、主反射
鏡１の周辺に対応する位置で略直角に曲げて主反射鏡１
の周辺一部に連結させた構成としている。FIG. 1 is an external view of an antenna device using an embodiment of the present invention. In the figure, 1 is a main reflector, 2 is a primary radiator, 3 is a support column, and 4 is a transceiver, and the support column 3 supports the primary radiator 2, the transceiver 4, and the like. The support column 3 extends from the tip end supporting the primary radiator 2 and the transmitter / receiver 4 and the like substantially parallel to the surface of the main reflecting mirror 1, and is substantially perpendicular to a position corresponding to the periphery of the main reflecting mirror 1. Bend to main reflector 1
It is configured to be connected to a part of the periphery of.
このように支持柱３を構成することにより、この支持
柱３を用いたアンテナ装置の反射波の方向は第２図のよ
うになる。図において、５は一次放射器の放射軸,6はア
ンテナ放射軸,7は一次放射器より発せられ支持柱に反射
される電波の進行方向,8は支持柱に反射された電波７の
進行方向である。即ち、図示のように、一次放射器２か
らの電波が支持柱３に到達してここで反射された場合で
も、この反射波８は主反射鏡１の面と略平行に反射され
るため、主反射鏡１に入射されることはない。このた
め、主反射鏡１から反射されることもなく、サイドロー
ブ特性の劣化を防止することが可能となる。By constructing the support columns 3 in this way, the directions of the reflected waves of the antenna device using the support columns 3 are as shown in FIG. In the figure, 5 is the radiation axis of the primary radiator, 6 is the antenna radiation axis, 7 is the traveling direction of the radio wave emitted from the primary radiator and reflected by the supporting column, and 8 is the traveling direction of the radio wave 7 reflected by the supporting column. Is. That is, as shown in the drawing, even when the radio wave from the primary radiator 2 reaches the support column 3 and is reflected there, the reflected wave 8 is reflected substantially parallel to the surface of the main reflecting mirror 1, It does not enter the main reflecting mirror 1. Therefore, the side lobe characteristics can be prevented from being deteriorated without being reflected by the main reflecting mirror 1.
なお、以上の説明はすべて送信波により行ったが、ア
ンテナの可逆の理により、受信波についても同様の効果
があることはいうまでもない。It should be noted that although all the above explanations have been made with the transmission wave, it is needless to say that the reception wave has the same effect due to the reversibility of the antenna.
以上のように本発明は、支持柱で反射される電波が主
反射鏡に向かうことがないように支持柱を構成している
ので、アンテナ軸近傍のサイドローブを劣化させること
はない。また、本発明のアンテナ装置を縦型接地のオフ
セットパラボナアンテナに適用した場合は、一次放射器
から発せられる電波のうち、主反射鏡へ向かう有効なエ
ネルギーを支持柱の着雪がブロッキングする等の電波障
害が受け難くなるという効果もある。As described above, according to the present invention, since the supporting column is configured so that the radio wave reflected by the supporting column does not go to the main reflecting mirror, the side lobe near the antenna axis is not deteriorated. Further, when the antenna device of the present invention is applied to a vertical ground offset parabona antenna, among the radio waves emitted from the primary radiator, radio waves such as snow on the support pillar blocking effective energy toward the main reflector. It also has the effect of making it harder for people to get hurt.
第１図は本発明のアンテナ装置の一実施例の斜視図、第
２図は第１図のアンテナ装置の支持柱による反射波の進
行方向を説明する要部の側面図、第３図は従来のアンテ
ナ装置の斜視図、第４図は従来のアンテナ装置の支持柱
による反射波の進行方向を説明する一部の側面図であ
る。 １……主反射鏡、２……一次放射器、3,3′……支持
柱、４……送受信器、５……一次放射器放射軸、６……
アンテナ放射軸、7,7′……一次放射器より支持柱へ向
かう電波、8,8′……支持柱より反射される電波。FIG. 1 is a perspective view of an embodiment of an antenna device of the present invention, FIG. 2 is a side view of a main part for explaining a traveling direction of a reflected wave by a supporting column of the antenna device of FIG. 1, and FIG. FIG. 4 is a perspective view of the antenna device of FIG. 4, and FIG. 4 is a partial side view for explaining the traveling direction of the reflected wave by the support column of the conventional antenna device. 1 ... Main reflector, 2 ... Primary radiator, 3,3 '... Support pillar, 4 ... Transceiver, 5 ... Primary radiator radiation axis, 6 ...
Antenna radiation axis, 7,7 '... Radio waves traveling from the primary radiator to the support pole, 8,8' ... Radio waves reflected from the support pole.
Claims (1)
放射器と、前記一次放射器の位相中心が主反射鏡の焦点
と一致するように一次放射器を固定する一次放射器支持
柱とにより構成されるオフセットパラボラアンテナ装置
において、前記支持柱は、前記一次放射器より発せられ
る電波が投射される部分の形状が、この投射された電波
が前記主反射鏡に入射されない方向に反射される形状に
構成されたことを特徴とするアンテナ装置。1. A main reflector, a primary radiator facing the main reflector, and a primary radiator support for fixing the primary radiator so that a phase center of the primary radiator coincides with a focal point of the main reflector. In the offset parabolic antenna device including a pillar, the support pillar has a shape of a portion on which a radio wave emitted from the primary radiator is projected, and the projected radio wave is reflected in a direction in which the radio wave is not incident on the main reflecting mirror. An antenna device characterized in that the antenna device is formed into a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63286228A JP2689537B2 (en) | 1988-11-12 | 1988-11-12 | Antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63286228A JP2689537B2 (en) | 1988-11-12 | 1988-11-12 | Antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02131604A JPH02131604A (en) | 1990-05-21 |
| JP2689537B2 true JP2689537B2 (en) | 1997-12-10 |
Family
ID=17701626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63286228A Expired - Fee Related JP2689537B2 (en) | 1988-11-12 | 1988-11-12 | Antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2689537B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59218006A (en) * | 1983-05-25 | 1984-12-08 | Dx Antenna Co Ltd | Offset parabolic antenna device |
| JPS59218007A (en) * | 1983-05-25 | 1984-12-08 | Dx Antenna Co Ltd | Offset parabolic antenna device |
-
1988
- 1988-11-12 JP JP63286228A patent/JP2689537B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59218006A (en) * | 1983-05-25 | 1984-12-08 | Dx Antenna Co Ltd | Offset parabolic antenna device |
| JPS59218007A (en) * | 1983-05-25 | 1984-12-08 | Dx Antenna Co Ltd | Offset parabolic antenna device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02131604A (en) | 1990-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |