JPS63184406A - Reflecting mirror antenna - Google Patents
Reflecting mirror antennaInfo
- Publication number
- JPS63184406A JPS63184406A JP1666587A JP1666587A JPS63184406A JP S63184406 A JPS63184406 A JP S63184406A JP 1666587 A JP1666587 A JP 1666587A JP 1666587 A JP1666587 A JP 1666587A JP S63184406 A JPS63184406 A JP S63184406A
- Authority
- JP
- Japan
- Prior art keywords
- horn
- circular
- corrugated
- corrugated horn
- primary radiator
- 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 230000005855 radiation Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005388 cross polarization Methods 0.000 abstract description 3
- 230000005672 electromagnetic field Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、衛星放送装置等の放送用空中線に使用され、
円形コルゲートホーンと円形又は楕円外部コルゲートホ
ーンを組み合わせた一次放射器−を用いた反射鏡空中線
に関し、特に成形放射指向性を得る反射鏡空中線に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is used for broadcasting antennas such as satellite broadcasting equipment,
The present invention relates to a reflector antenna using a primary radiator that combines a circular corrugated horn and a circular or elliptical external corrugated horn, and particularly relates to a reflector antenna that obtains shaped radiation directivity.
（従来の技術）
従来この種の反射鏡空中線は、成形放射指向性を得る方
法として、第４図（ａ）及び（ｂ）の正面図及び斜視図
に示すように、一次放射器に円形コルゲートホーン１と
矩形ホーン２とを組み合わせ、第４図（Ｃ）に示すよう
に反射鏡５に電波を放射し、それぞれの電力分配比及び
相対位相の組合わせ特性を選択することによって、成形
放射指向性を実現していた。(Prior Art) Conventionally, this type of reflector antenna has a circular corrugated structure on the primary radiator as shown in the front and perspective views of FIGS. 4(a) and 4(b) as a method of obtaining shaped radiation directivity. By combining the horn 1 and the rectangular horn 2, emitting radio waves to the reflecting mirror 5 as shown in FIG. He had realized his sexuality.
あるいはその変形として、第５図（ａ）及び（ｂ）の正
面図及び斜視図に示すように、楕円コルゲートホーン３
と開口径りの異なる円形ホーン４ａ及び４ｂとを組み合
わせて一次放射器とし、第５図（Ｃ）に示すように反射
鏡５に電波を放射し、それぞれのホーンの電力分配比及
び相対位相を選択することによって成形放射指向性を実
現している。Alternatively, as a modification thereof, as shown in the front view and perspective view of FIGS. 5(a) and 5(b), an elliptical corrugated horn 3
and circular horns 4a and 4b with different aperture diameters are combined to form a primary radiator, and radio waves are radiated to the reflector 5 as shown in FIG. Shaped radiation directivity is achieved by selection.
（発明が解決しようとする問題点）
上述した従来の反射鏡空中線に用いられた一次放射器の
円形コルゲートホーン１及び楕円コルゲートホーン３の
コルゲート部は、モードとしてハイブリッドモード、Ｈ
Ｅ１１モードを通常用いるから、電磁界分布が反射鏡照
射範囲において８面とＨ面がそろい対称となる。したが
って円偏波励振した場合、良好な円偏波特性、良好な交
さ偏波特性及び低いサイドローブレベルが得られる。し
かし内壁が滑らかなホーンは、基本的にＥ面放射特性と
Ｈ面放射特性が非対称である。(Problems to be Solved by the Invention) The corrugated portions of the circular corrugated horn 1 and the elliptical corrugated horn 3 of the primary radiator used in the conventional reflector antenna described above have hybrid mode, H
Since the E11 mode is normally used, the electromagnetic field distribution becomes symmetrical with the eight planes and the H plane aligned in the reflecting mirror irradiation range. Therefore, when circularly polarized wave excitation is performed, good circular polarized wave characteristics, good cross polarized wave characteristics, and a low sidelobe level can be obtained. However, a horn with a smooth inner wall basically has asymmetrical E-plane radiation characteristics and H-plane radiation characteristics.
したがって第４図に示すように円形コルゲートホーン１
と一個の矩形ホーン２とを組み合わせるか、又は第５図
に示すように楕円コルゲートホーン３と円形ホーン４ａ
、４ｂとを組み合わせて、反射鏡５を照射する一次放射
器として用いた場合、円偏波率、交さ偏波率、サイドロ
ーブレベルがホーン側ビームにおいて劣化する欠点があ
る。又複数個のホーン間の間隔は、各々のビーム変移量
に関係するから、第４図又は第５図に示すような反射鏡
空中線を衛星搭載用空中線として用い、例えば日本全土
を照射する場合、矩形ホーン２又は円形ホーン４ａ、４
ｂを通常のコルゲートホーンにすることも考えられるが
、ビーム変移量が大きくなりすぎて最適配置が困難とな
り、やむをえずコルゲートホーンと内壁の滑らかなホー
ンとを組み合わせた一次放射器を用いていた。Therefore, as shown in Fig. 4, the circular corrugated horn 1
and one rectangular horn 2, or an elliptical corrugated horn 3 and a circular horn 4a as shown in FIG.
, 4b in combination and used as a primary radiator for irradiating the reflecting mirror 5, there is a drawback that the circular polarization coefficient, cross polarization coefficient, and sidelobe level deteriorate in the horn side beam. Furthermore, since the spacing between multiple horns is related to the amount of beam displacement of each, when using a reflector antenna as shown in Fig. 4 or 5 as a satellite-mounted antenna to irradiate all of Japan, for example, Rectangular horn 2 or circular horn 4a, 4
It was possible to use a normal corrugated horn for b, but the amount of beam displacement would be too large, making optimal placement difficult, so a primary radiator that was a combination of a corrugated horn and a horn with a smooth inner wall was unavoidably used.
（問題点を解決するための手段）
前述の問題点を解決するために本発明が提供する手段は
、複数個のホーンアンテナを一次放射器として用いる反
射鏡空中線であって、前記一次放射器が円形コルゲート
ホーンと外部コルゲートホーンとの組合わせからなり、
前記円形コルゲートホーンは円形ホーンの内壁に中心軸
対称に複数個の溝を設けてなり、前記外部コルゲートホ
ーンは内壁が滑らかな円形ホーン又は内壁が滑らかな楕
円ホーンの外周部の、前記円形コルゲートホーンの外縁
部と接する部分以外の範囲に、前記円形ホーン又は楕円
ホーンの中心軸に垂直な方向に、複数個の外部導体フィ
ンを設けた円形外部コルゲートホーン又は楕円外部コル
ゲートホーンであることを特徴とする。(Means for Solving the Problems) Means provided by the present invention to solve the above-mentioned problems is a reflector antenna using a plurality of horn antennas as primary radiators, the primary radiators being Consisting of a combination of a circular corrugated horn and an external corrugated horn,
The circular corrugated horn has a plurality of grooves symmetrically provided on the inner wall of the circular horn, and the external corrugated horn is a circular corrugated horn having a smooth inner wall or an elliptical horn having a smooth inner wall. The horn is characterized by being a circular external corrugated horn or an elliptical external corrugated horn, in which a plurality of external conductor fins are provided in a direction perpendicular to the central axis of the circular horn or elliptical horn in a range other than the part in contact with the outer edge of the horn. do.
（実施例） 次に実施例について図面を参照して説明する。(Example) Next, embodiments will be described with reference to the drawings.
各図中同一部分には同一符号を付す。Identical parts in each figure are given the same reference numerals.
第１図は本発明による反射鏡空中線の一実施例を示し、
１は円形コルゲートホーン、６は円形外部コルゲートホ
ーン、７はこの円形外部コルゲートホーン６の外部フィ
ンを示し、これら二つ、のホーンを組み合わせて一次放
射器を構成する。第１図（ａ）はこの一次放射器の斜視
図であり、第１図（ｂ）はこの一次放射器と反射鏡５と
を取り合わせて反射鏡空中線を形成し、一次放射器から
反射鏡５に向は電波が照射される様子を示している。FIG. 1 shows an embodiment of the mirror antenna according to the present invention,
1 is a circular corrugated horn, 6 is a circular external corrugated horn, and 7 is an external fin of this circular external corrugated horn 6. These two horns are combined to form a primary radiator. FIG. 1(a) is a perspective view of this primary radiator, and FIG. 1(b) is a perspective view of this primary radiator and a reflecting mirror 5, which are combined to form a reflecting mirror antenna, and from the primary radiator to the reflecting mirror 5. The opposite direction shows how radio waves are irradiated.
第２図（ａ）及び（ｂ）はそれぞれ第１図（ａ）に示さ
れている一次放射器の正面図及び側面図である。但し、
本図（ｂ）の側面図は、同図（ａ）の正面図において鎖
線ＡＢＣ及び鎖線ＥＦＧによりそれぞれ円形コルゲート
ホーン１及び円形外部コルゲートホーン６を切断して示
す部分断面側面図である。又円形外部コルゲートホーン
６の外部導体フィン７の寸法は、自由空間波長をλとす
ると、潔さρが約λ／４、フィン間の間隔ｅは約λ／８
で、フィンの厚みｔは約λ１５以下である。FIGS. 2(a) and 2(b) are front and side views, respectively, of the primary radiator shown in FIG. 1(a). however,
The side view of Figure (b) is a partial cross-sectional side view showing the circular corrugated horn 1 and the circular external corrugated horn 6 cut along chain lines ABC and chain lines EFG, respectively, in the front view of Figure (a). Furthermore, the dimensions of the external conductor fins 7 of the circular external corrugated horn 6 are such that, where the free space wavelength is λ, the cleanliness ρ is approximately λ/4, and the spacing e between the fins is approximately λ/8.
The thickness t of the fin is approximately λ15 or less.
第１図及び第２図において、円形外部コルゲートホーン
６の円形コルゲートホーン１側と接する管壁側の導体フ
ィンは、円形コルゲートホーン１の内側導体フィン８を
共用する構造である。これによって第２図（ａ）に示す
ように、円形外部コルゲートホーン６と円形コルゲート
ボーン１との間隔ｄは、従来の円形ホーンと円形コルゲ
ートホーン１とを組み合わせた一次放射器と同じ間隔セ
構成できる。したがって内側導体フィン８の効果で、ホ
ーン間の間隔ｄを従来と同じに保持したままで、電磁界
分布の８面及びＨ面の放射特性をそろえることができる
。したかって一次放射器として用いた場合、交さ偏波、
サイドローブ特性及び円偏波率を従来より改善できる。1 and 2, the conductor fins on the pipe wall side of the circular external corrugated horn 6 that are in contact with the circular corrugated horn 1 side share the inner conductive fins 8 of the circular corrugated horn 1. As a result, as shown in FIG. 2(a), the distance d between the circular external corrugated horn 6 and the circular corrugated bone 1 is the same as that of the primary radiator that combines the conventional circular horn and the circular corrugated horn 1. can. Therefore, due to the effect of the inner conductor fins 8, the radiation characteristics of the 8-plane and H-plane of the electromagnetic field distribution can be made equal while maintaining the distance d between the horns the same as before. Therefore, when used as a primary radiator, cross-polarized waves,
The side lobe characteristics and circular polarization coefficient can be improved compared to the conventional method.
第３国は第１図に示す円形外部コルゲートホーン６の代
りに、楕円外部コルゲートホーン９を用いた一次放射器
を示し、この一次放射器と反射鏡とを取り合わせて本発
明の他の実施例が得られる。A third country shows a primary radiator using an elliptical external corrugated horn 9 instead of the circular external corrugated horn 6 shown in FIG. is obtained.
なお、本発明による反射鏡空中線用一次放射器の複数組
と、一台の反射鏡とを取り合わせるか、又は本発明によ
る反射鏡空中線用一次放射器と他の一次放射器とを一台
の反射鏡に取り合わせて、本発明による反射鏡空中線を
形成することもできる。It should be noted that a plurality of sets of primary radiators for reflector antennas according to the present invention may be combined with one reflector, or the primary radiators for reflector antennas according to the present invention and other primary radiators may be combined into one set. A reflector antenna according to the invention can also be formed in conjunction with a reflector.
（発明の効果）
以上説明したように本発明による組合わせ一次放射器を
用いて反射鏡５を照射した場合、円形コルゲートホーン
１の内部導体フィン８と円形外部コルゲートホーン６又
は楕円外部コルゲートホーン９の外部導体フィンとを組
み合わせているから、外部導体フィンを持っていない円
形ホーン又は楕円ホーンと円形コルゲートホーンとを組
み合わせた従来の一次放射器と同じ配置間隔ｄのままで
、一次放射器の電磁界分布の８面放射特性とＨ面放射特
性をそろえる事が可能となる。そのため反射鏡５に本発
明の一次放射器を用いた場合、交さ偏波特性、サイドロ
ーブ特性の優れた成形放射指向性が必然的に得られ、本
装置を衛星搭載空中線として用いる場合電気設計の自由
度が増すから、設計及び製造面の効率が上がり、経済的
にも有利となる。本発明にはこのような効果がある。(Effects of the Invention) As explained above, when the reflecting mirror 5 is irradiated using the combined primary radiator according to the present invention, the internal conductor fins 8 of the circular corrugated horn 1 and the circular external corrugated horn 6 or the elliptical external corrugated horn 9 Because it is combined with external conductor fins, the electromagnetic radiation of the primary radiator remains the same as the conventional primary radiator, which is a combination of a circular horn without external conductor fins or an elliptical horn and a circular corrugated horn. It becomes possible to match the 8-plane radiation characteristics and the H-plane radiation characteristics of the field distribution. Therefore, when the primary radiator of the present invention is used as the reflector 5, shaped radiation directivity with excellent cross-polarization characteristics and sidelobe characteristics is naturally obtained. Since the degree of freedom in design increases, efficiency in design and manufacturing increases, which is also economically advantageous. The present invention has such effects.
第１図（ａ）は本発明による反射鏡空中線用一次放射器
の一実施例の斜視図、第１図（ｂ）は第１図（ａ）の一
次放射器と反射鏡を取り合わせた反射鏡空中線を示す模
式図、第２図（ａ）及び（ｂ）はそれぞれ第１図（ａ＞
の一次放射器の正面図及び側面図、第３図は本発明にか
かわる反射鏡空中線用一次放射器の他の実施例を示す斜
視図、第４図及び第５図はそれぞれ従来の反射鏡空中線
の例を示す図である。
１・・・円形コルゲートホーン、２・・・矩形ホーン、
３・・・楕円コルゲートホーン、４ａ、４ｂ・・・円形
ホーン、５・・・反射鏡、６・・・円形外部コルゲート
ホーン、７・・・外部導体フィン、８・・・内部導体フ
ィン、９・・・楕円外部コルゲートホーン。FIG. 1(a) is a perspective view of an embodiment of a primary radiator for a reflector antenna according to the present invention, and FIG. 1(b) is a reflector that combines the primary radiator of FIG. 1(a) and a reflector. Schematic diagrams showing the antenna, Figures 2 (a) and (b) are respectively similar to Figure 1 (a>
A front view and a side view of the primary radiator, FIG. 3 is a perspective view showing another embodiment of the primary radiator for a reflector antenna according to the present invention, and FIGS. 4 and 5 respectively show a conventional reflector antenna. FIG. 1...Circular corrugated horn, 2...Rectangular horn,
3... Elliptical corrugated horn, 4a, 4b... Circular horn, 5... Reflector, 6... Circular external corrugated horn, 7... Outer conductor fin, 8... Inner conductor fin, 9 ...Oval external corrugated horn.
Claims (1)
鏡空中線において、前記一次放射器が円形コルゲートホ
ーンと外部コルゲートホーンとの組合わせからなり、前
記円形コルゲートホーンは円形ホーンの内壁に中心軸対
称に複数個の溝を設けてなり、前記外部コルゲートホー
ンは内壁が滑らかな円形ホーン又は内壁が滑らかな楕円
ホーンの外周部の、前記円形コルゲートホーンの外縁部
と接する部分以外の範囲に、前記円形ホーン又は楕円ホ
ーンの中心軸に垂直な方向に、複数個の外部導体フィン
を設けた円形外部コルゲートホーン又は楕円外部コルゲ
ートホーンであることを特徴とする反射鏡空中線。In a reflector antenna using a plurality of horn antennas as primary radiators, the primary radiators are composed of a combination of a circular corrugated horn and an external corrugated horn, and the circular corrugated horns are arranged in plural numbers on the inner wall of the circular horn symmetrically about the central axis. The external corrugated horn has a circular horn with a smooth inner wall or an elliptical horn with a smooth inner wall, in an area other than the area in contact with the outer edge of the circular corrugated horn on the outer periphery of the circular horn or an elliptical horn with a smooth inner wall. A reflector antenna characterized in that it is a circular external corrugated horn or an elliptical external corrugated horn provided with a plurality of external conductor fins in a direction perpendicular to the central axis of the elliptical horn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1666587A JPS63184406A (en) | 1987-01-26 | 1987-01-26 | Reflecting mirror antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1666587A JPS63184406A (en) | 1987-01-26 | 1987-01-26 | Reflecting mirror antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63184406A true JPS63184406A (en) | 1988-07-29 |
Family
ID=11922620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1666587A Pending JPS63184406A (en) | 1987-01-26 | 1987-01-26 | Reflecting mirror antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63184406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999038228A1 (en) * | 1998-01-22 | 1999-07-29 | Matsushita Electric Industrial Co., Ltd. | Multi-primary radiator, down converter and multibeam antenna |
-
1987
- 1987-01-26 JP JP1666587A patent/JPS63184406A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999038228A1 (en) * | 1998-01-22 | 1999-07-29 | Matsushita Electric Industrial Co., Ltd. | Multi-primary radiator, down converter and multibeam antenna |
| US6483475B1 (en) | 1998-01-22 | 2002-11-19 | Matsushita Electric Industrial Co., Ltd. | Block-down-converter and multi-beam-antenna |
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