JPH0145763B2 - - Google Patents
Info
- Publication number
- JPH0145763B2 JPH0145763B2 JP13341482A JP13341482A JPH0145763B2 JP H0145763 B2 JPH0145763 B2 JP H0145763B2 JP 13341482 A JP13341482 A JP 13341482A JP 13341482 A JP13341482 A JP 13341482A JP H0145763 B2 JPH0145763 B2 JP H0145763B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- output terminal
- waveguide
- cylindrical waveguide
- rotating part
- 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
- 230000010287 polarization Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
- H01Q13/025—Multimode horn antennas; Horns using higher mode of propagation
- H01Q13/0258—Orthomode horns
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は衛星放送受信用のアンテナに関するも
ので、特に電波が直線偏波の場合に、互に直交す
る２つの偏波を切換えて受信できるようにしたも
のである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an antenna for receiving satellite broadcasting, and in particular, in the case where radio waves are linearly polarized waves, it is possible to switch between two mutually orthogonal polarized waves for reception. This is what I did.
従来例の構成とその問題点
従来の例を第１図に示す。ここで１はパラボラ
アンテナで、２は反射板である。３は給電部で、
４の給電端子と５の導波管・同軸変換出力端子と
から成つている。給電部３は矩形導波管に、給電
端子４と出力端子５を接続したもので、第１図の
場合には、矩形導波管と導波管→同軸変換の原理
的特性から第２図の偏波（Ａ→A′）しか受信し
ない。このため、偏波（Ｂ→B′）のみを受信す
る場合には第３図に示すように、アンテナ１を
90゜回転させる必要がある。ただ、この衛星放送
受信用アンテナは直径が１ｍから３ｍと大きいの
で、回転させるには、大がかりな工事が必要にな
る。Configuration of conventional example and its problems A conventional example is shown in FIG. Here, 1 is a parabolic antenna and 2 is a reflector. 3 is the power supply section,
It consists of 4 power supply terminals and 5 waveguide/coaxial conversion output terminals. The power supply unit 3 is a rectangular waveguide with a power supply terminal 4 and an output terminal 5 connected to it. Only the polarized wave (A→A') is received. Therefore, when receiving only polarized waves (B→B'), antenna 1 is
It needs to be rotated 90 degrees. However, this satellite broadcasting receiving antenna is large, with a diameter of 1m to 3m, so large-scale construction work is required to rotate it.
また１ｍ以上の大きなパラボラアンテナになる
と指向性の半値幅が1.5゜〜2.0゜と狭くなるために、
アンテナを回軸した後には必ずアンテナの指向性
の最も感度のよい方向に治具を用いて設定しなお
す作業が伴う。このため専問業者に工事を依頼す
る必要がある。また、屋内から電気的に回転させ
るためには、非常に強力なモータが必要になり高
価なものとなる。 In addition, when it comes to large parabolic antennas over 1 m, the half width of the directivity becomes narrower at 1.5° to 2.0°.
After rotating the antenna, it is always necessary to use a jig to reset the directivity of the antenna to the direction with the highest sensitivity. For this reason, it is necessary to request a specialized contractor to carry out the work. Furthermore, in order to electrically rotate it from indoors, a very powerful motor is required and is expensive.
発明の目的
本発明はそのような大がかりな工事や高価なモ
ータなどを用いる従来例の欠点を除去して簡単に
調整のできるパラボラアンテナを提供することを
目的とする。OBJECTS OF THE INVENTION It is an object of the present invention to provide a parabolic antenna that can be easily adjusted by eliminating the drawbacks of the conventional example that requires extensive construction work and expensive motors.
発明の構成
本発明は給電部に円筒導波管を用い、この円筒
導波管と出力端子との間に回転部を設け、出力端
子内に直交する二つの偏波を両方とも受信できる
小型アンテナを内蔵し、上記回転部に直交する二
つの偏波の一方を吸収する電波吸収板を設けたも
のであり、回転部を回転させるだけで直角偏波を
良好に受信することができるものである。Structure of the Invention The present invention uses a cylindrical waveguide as a power feeding section, and a rotating section is provided between the cylindrical waveguide and the output terminal, and a small antenna that can receive both orthogonal polarized waves within the output terminal. It is equipped with a radio wave absorbing plate that absorbs one of the two polarized waves perpendicular to the rotating part, and can receive orthogonally polarized waves well just by rotating the rotating part. .
実施例の説明
以下本発明の一実施例について図面を参照して
説明する。第４図、第５図にそれぞれ本発明の実
施例を示す。第４図、第５図において、６は反射
板、７は円筒導波管、８はこの円筒導波管７の先
端に取付けた給電端子、９は円筒導波管７後端に
取付けられた出力端子である。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Embodiments of the present invention are shown in FIGS. 4 and 5, respectively. In Figures 4 and 5, 6 is a reflection plate, 7 is a cylindrical waveguide, 8 is a power supply terminal attached to the tip of this cylindrical waveguide 7, and 9 is attached to the rear end of the cylindrical waveguide 7. It is an output terminal.
円筒導波管７は偏波（Ａ→A′）も（Ｂ−B′）
も通過させるので、（Ａ→A′）か（Ｂ−B′）の片
方のみを受信するには給電部の内側で細工を行な
う必要がある。 The cylindrical waveguide 7 has polarized waves (A→A') as well as (B-B')
Since the signal also passes through, it is necessary to modify the inside of the power feeding section in order to receive only one of (A→A') or (B-B').
第６図に給電部の導波管→同軸変換部の詳細を
示す。１０は出力端子５を構成する導波管の内部
に設置された小型アンテナで、導波管の外で同軸
ケーブルの内芯に接続される。なお、この小型ア
ンテナ７は直線偏波（Ａ→A′）と（Ｂ−B′）の
両方を受信するものを用いる。１１は電波吸収板
である。この様に構成すると、電波吸収板１１に
直角な偏波（Ａ→A′）は小型アンテナ１０で受
信されるが、偏波（Ｂ−B′）は電波吸収板８に
吸収されて、小型アンテナ１０では受信されな
い。ここで、電波吸収板１１を内蔵している円筒
導波管は円筒導波管７、出力端子９に対し回転可
能な回転部１２とする。この回転部を90゜回転さ
せると、今度は電波吸収板１１と平行な偏波（Ａ
→A′）は吸収されて、小型アンテナ１０では受
信されないが、電波吸収板１１と直角な偏波（Ｂ
−B′）は、電波吸収板１１で吸収されないので、
小型アンテナ１０まで電波が達し、信号として受
信される。 FIG. 6 shows details of the waveguide to coaxial conversion section of the power feeding section. A small antenna 10 is installed inside the waveguide constituting the output terminal 5, and is connected to the inner core of the coaxial cable outside the waveguide. Note that this small antenna 7 is one that can receive both linearly polarized waves (A→A') and (B-B'). 11 is a radio wave absorbing plate. With this configuration, the polarized wave (A→A') perpendicular to the radio wave absorbing plate 11 is received by the small antenna 10, but the polarized wave (B-B') is absorbed by the radio wave absorbing plate 8, It is not received by antenna 10. Here, the cylindrical waveguide containing the radio wave absorbing plate 11 is assumed to be the cylindrical waveguide 7 and the rotating part 12 which can rotate with respect to the output terminal 9. When this rotating part is rotated 90 degrees, polarized waves parallel to the radio wave absorbing plate 11 (A
→A') is absorbed and not received by the small antenna 10, but the polarized wave (B
-B') is not absorbed by the radio wave absorbing plate 11, so
The radio wave reaches the small antenna 10 and is received as a signal.
なお、小型アンテナ１０としては、第６図に示
すような、先端を切り離した円形のものもある
が、第７図に示すような形状のものでもよい。但
し、円筒導波管の中に入つている部分で、偏波
（Ａ→A′）と（Ｂ−B′）に装行な部分が形状的に
ほぼ等しい長さを持つことが必要である。なぜな
ら、偏波が異なつた場合でも感度は等しくしたい
と言う要求を満たすためである。 The small antenna 10 may have a circular shape with a cut-off tip as shown in FIG. 6, but it may also have a shape as shown in FIG. 7. However, it is necessary that the part inside the cylindrical waveguide, which is polarized (A→A') and (B-B'), has approximately the same length in terms of shape. . This is because it satisfies the demand for equal sensitivity even when polarized waves differ.
発明の効果
以上のように本発明はパラボラアンテナの回転
部のみを回転させることにより、２つの直交する
直線偏波の電波を別々に受信することができる。
これにより１ｍ以上もあるパラボラアンテナを回
転させずに済むために、パラボラアンテナの指向
性の最も感度のよい方向に、アンテナを設定しな
おす作業も不必要で、さらには回転部のみを回転
させればよいので、小形のモーターなどでも遠隔
操作が可能になるものである。Effects of the Invention As described above, the present invention can separately receive two orthogonal linearly polarized radio waves by rotating only the rotating part of the parabolic antenna.
This eliminates the need to rotate the parabolic antenna, which is over 1 meter long, so there is no need to reset the antenna to the direction of the most sensitive directivity of the parabolic antenna, and furthermore, it is not necessary to rotate only the rotating part. This makes it possible to remotely control even small motors.
第１図、第３図は従来例におけるパラボラアン
テナの斜視図、第２図は電波の方向を示す図、第
４図、第５図はそれぞれ本発明の実施例における
パラボラアンテナの斜視図、第６図は同アンテナ
の一部分の詳細を示す斜視図、第７図は同アンテ
ナに用いられる小型アンテナの斜視図である。
６……反射板、７……円筒導波管、８……給電
端子、９……出力端子、１０……小型アンテナ、
１１……電波吸収板、１２……回転部。
1 and 3 are perspective views of a parabolic antenna in a conventional example, FIG. 2 is a diagram showing the direction of radio waves, and FIGS. 4 and 5 are perspective views of a parabolic antenna in an embodiment of the present invention, respectively. FIG. 6 is a perspective view showing details of a portion of the antenna, and FIG. 7 is a perspective view of a small antenna used in the antenna. 6... Reflection plate, 7... Cylindrical waveguide, 8... Feeding terminal, 9... Output terminal, 10... Small antenna,
11... Radio wave absorbing plate, 12... Rotating part.
Claims (1)
先端に給電端子を、後端部に出力端子を取付け、
この出力端子内に直交する二つの偏波を同時に受
信することができる小型アンテナを内蔵し、上記
円筒導波管と上記出力端子との間に上記円筒導波
管および出力端子に対し回転可能な回転部を設
け、この回転部内に上記直交する二つの偏向の一
方を吸収する電波吸収板を設けたパラボラアンテ
ナ。1 Attach a cylindrical waveguide to the reflector, attach a power supply terminal to the tip of this waveguide, an output terminal to the rear end,
A small antenna that can simultaneously receive two orthogonal polarized waves is built into this output terminal, and is rotatable with respect to the cylindrical waveguide and the output terminal between the cylindrical waveguide and the output terminal. A parabolic antenna that includes a rotating part and a radio wave absorbing plate that absorbs one of the two orthogonal polarizations in the rotating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57133414A JPS5923601A (en) | 1982-07-29 | 1982-07-29 | Parabolic antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57133414A JPS5923601A (en) | 1982-07-29 | 1982-07-29 | Parabolic antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5923601A JPS5923601A (en) | 1984-02-07 |
| JPH0145763B2 true JPH0145763B2 (en) | 1989-10-04 |
Family
ID=15104208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57133414A Granted JPS5923601A (en) | 1982-07-29 | 1982-07-29 | Parabolic antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923601A (en) |
-
1982
- 1982-07-29 JP JP57133414A patent/JPS5923601A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5923601A (en) | 1984-02-07 |
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