JPS61234602A - Antenna system - Google Patents
Antenna systemInfo
- Publication number
- JPS61234602A JPS61234602A JP7701685A JP7701685A JPS61234602A JP S61234602 A JPS61234602 A JP S61234602A JP 7701685 A JP7701685 A JP 7701685A JP 7701685 A JP7701685 A JP 7701685A JP S61234602 A JPS61234602 A JP S61234602A
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- antenna device
- cross
- horn
- waveguide
- 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.)
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、所定の距離離れて対向する送信・受信系ア
ンテナ装置において、送信系アンテナ装置から放射され
た電波が直交２偏波間の分離特性を損なわずに受信でき
るようにしたアンテナ装置系に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a transmitting/receiving antenna device that faces each other at a predetermined distance, and that radio waves radiated from the transmitting antenna device have separation characteristics between two orthogonal polarized waves. The present invention relates to an antenna device system that allows reception without loss of signal.
第４図は、伝搬路［１１に対向して設置された従来の送
信・受信系アンテナ装置であり、 ＋２１． （２’
）は送信・受信系アンテナ装置の偏波を分離する偏分波
器、 ！３１． （３’）は送信系および受信系アン
テナ装置の一次放射器であるホーン、 （７１，（７’
）は送信系および受信系アンテナ装置の主反射鏡、 ＋
８１゜（８′）は空間伝搬路（１１を伝搬する直接波お
よび反射波である。FIG. 4 shows a conventional transmitting/receiving antenna device installed opposite the propagation path [11]. (2'
) is a polarization splitter that separates the polarization of transmitting and receiving antenna equipment, ! 31. (3') is a horn that is the primary radiator of the transmitting system and receiving system antenna device; (71, (7')
) is the main reflector of the transmitting and receiving antenna equipment, +
81° (8') is the direct wave and reflected wave propagating through the spatial propagation path (11).
従来、このようなアンテナ装置系で、所定の偏波分離度
すなわち交さ偏波識別度を得るためには。Conventionally, in such an antenna system, in order to obtain a predetermined degree of polarization separation, that is, a degree of crossed polarization discrimination.
第４図に示す送信系および受信系アンテナ装置を完全に
正対させ、それぞれの偏分波器（２１，（２’）を交互
に所定の角度回転させて受信系アンテナ装置で見た垂直
偏波の交さ偏波成分ＶＸ と水平偏波の交さ偏波成分Ｈ
ｘがともに最良となる位置に上記１１６分波器（２）、
（２’竜固定することにより、良好な交ざ偏波識別
度特性を得るようにし、てい７−ｃ 。The transmitting system and receiving system antenna devices shown in FIG. Cross polarization component VX of waves and cross polarization component H of horizontal polarization
The above-mentioned 116 branching filter (2) is placed at the position where x is the best.
(By fixing the 2' loop, good cross-polarized wave discrimination characteristics can be obtained.7-c.
〔発明が解決しＸうとする問題点Ｊ ｌ−かし、この方式では、第５図に示すように。[Problem that the invention attempts to solve However, in this method, as shown in FIG.
ＶＸ、 ＨＸの識別度が最大となる偏分波器の回転角度
が大きくずれている場合、広帯域にわたり所定の交さ偏
ｖｉｉｉ＆別要が得られないという欠点があった。一般
に、伝搬路（１）上の反射点での反射係数が小さい場合
には、上述したように送信系および受信糸アンテナ装置
を完全に正対させれば１扁分波器＋２１． （２”）
を回転させたときのＶｘ、Ｈｘの識別度の最大となる回
転角度はほぼ一致し、良好な４８性が得られる。If the rotation angle of the polarization demultiplexer at which the degree of discrimination between VX and HX is maximized is greatly deviated, there is a drawback that a predetermined crossing polarization viii & dichotomy cannot be obtained over a wide band. Generally, when the reflection coefficient at the reflection point on the propagation path (1) is small, if the transmitting system and the receiving thread antenna device are completely facing each other as described above, 1 beam splitter + 21. (2”)
When rotated, the rotation angles at which the discrimination degree of Vx and Hx becomes maximum are almost the same, and a good 48 property can be obtained.
しかし９反射波（８′）成分が直接波（８）成分に較べ
十分に小さくない場合、′ｔ′なわち、伝搬路ｉｌ＋に
おける反射波（７′）の反射点での反射係数が大きい場
合には、受信系アンテナ装置ｖｃ ｉ−ｔ 、直接波（
８）と反射波（８′）が同時に受信され、ここで２反射
波（８′）が反射のさいｒ７ｃ個波の傾きが生じている
場合Ｖ′Ｃは。However, if the 9 reflected wave (8') component is not sufficiently smaller than the direct wave (8) component, 't', that is, if the reflection coefficient at the reflection point of the reflected wave (7') in the propagation path il+ is large. includes a receiving system antenna device vc i-t, a direct wave (
8) and the reflected wave (8') are received at the same time, and here, when the two reflected waves (8') have a slope of r7c waves during reflection, V'C is.
直接波（８）との合成により１通常は、水平もシ、＜は
垂直から傾いただ円偏波となる。By combining with the direct wave (8), 1 becomes a circularly polarized wave that is normally horizontal and tilted from the vertical.
さらに、受信系アンテナ装置の反射鏡（７′）が非回転
対称であるため、送信偏波の違いにニジ、だ円偏波の回
転方向も異なる。Furthermore, since the reflecting mirror (7') of the receiving antenna device is non-rotationally symmetrical, the rotation directions of the rainbow and elliptical polarizations are also different depending on the difference in the transmission polarization.
このため、第５図に示しているように、Ｖｘ。Therefore, as shown in FIG. 5, Vx.
Ｈｘの識別度の最大となる偏分波器ｆ２＋、 （２’
）の回転角度はずれ、その落ち込みの深さもなまってく
る。図中、実線はＨｘ＋点線はＶｘの場合であり。The polarization demultiplexer f2+, (2'
) will shift, and the depth of the drop will become duller. In the figure, the solid line is for Hx and the dotted line is for Vx.
第５図（ａ）は、送信系アンテナ装置の偏分波器（２）
を回転した場合、第５図（ｂ）は、受信系アンテナ装置
の偏分波器（２′）を回転した場合の受信系アンテナ装
置系で見た交さ偏波識別度特性である。Figure 5(a) shows the polarization splitter (2) of the transmission system antenna device.
FIG. 5(b) shows the cross-polarization discrimination characteristics as seen in the receiving antenna system when the polarization splitter (2') of the receiving antenna system is rotated.
この場合、偏分岐器＋２１ 、 （２’）の設定角度
は１通常ＶｘとＨｘの交点に選ばれるが、 Ｖｘ、
Ｈｘの識別度の最大となる偏分波器［２＋ 、 （２
’）の回転角度は周波数によっても異なるため、広帯域
にわたって良好な交さ偏波識別度特性を得ることが困難
であった。In this case, the setting angle of the partial splitter +21, (2') is usually chosen at the intersection of Vx and Hx, but Vx,
The polarization demultiplexer [2+, (2
Since the rotation angle of ') differs depending on the frequency, it has been difficult to obtain good cross-polarization discrimination characteristics over a wide band.
この発明は、上記のような問題を解決するためになされ
たもので、だ円偏波を直線偏波に変換［７゜良好な交さ
偏波識別特性を有するアンテナ装置系を得ることを目的
としたものである。This invention was made to solve the above-mentioned problems, and aims to convert elliptical polarized waves to linearly polarized waves [7°] to obtain an antenna system having good cross-polarized wave discrimination characteristics. That is.
この発明に係るアンテナ装置系は、送信および受信系ア
ンテナ装置の複数枚の反射鏡がそれぞねの反射鏡で発生
する交さ偏波成分を打消すように構成され、きらに受信
系アンテナ装置のホーンと偏分波器の間にだ円導波管を
挿入し７たものである２゜〔作用〕
この発明におけるアンテナ装置系は２反射鏡で発生する
交さ偏波成分を相殺するように構成された送信・受信系
アンテナ装置と受信系アンテナ装置のホーンの給′亀端
に接続されただ円導波管により、伝搬路で変換されるだ
円偏波を直線偏波に変換し、良好な交さ偏波識別度特性
を得るように１−だものである。The antenna device system according to the present invention is configured such that a plurality of reflecting mirrors of the transmitting and receiving antenna devices cancel out cross-polarized components generated by each reflecting mirror, and the receiving antenna device An elliptical waveguide is inserted between the horn and the polarization splitter.[Function] The antenna system of this invention is designed to cancel the cross-polarized components generated by the two reflecting mirrors. The transmitting/receiving antenna device configured in 1- to obtain good cross-polarization discrimination characteristics.
第１図は本発明の一実施例を示すもので、 （４１゜（
４′）は送信系および受信系アンテナ装置の一次放射器
であり、理想的には交さ偏波成分を全く発生しないコル
ゲートホーンである。又、 （５１，（５”）は送信系
および受信系アンテナ装置の回転二次曲面鏡からなる第
１副反射鏡、 （６１，（６’）は送信系および受信系
アンテナ装置の回転二次曲面鏡からなる＠２副反射鏡、
（７１，（７’）は送信系および受信系アンテナ装置
の主反射鏡であり、それぞれの反射鏡で発生する交さ偏
波成分を相殺するように反射鏡が構成されている。さら
に、（９）は受信系アンテナ装置ノコルゲートホーン（
４′）の給電端に接続された管軸を中心に回転可能で内
部の断面形状がだ円形の導波管である。なお、 （１１
，（２Ｌ （２’ｌ・（８）＃（８′）は第４図に示
したものと同様である。FIG. 1 shows an embodiment of the present invention, (41°(
4') is the primary radiator of the transmitting system and receiving system antenna device, and ideally it is a corrugated horn that does not generate any crossed polarization components. In addition, (51, (5") is the first sub-reflector consisting of a rotating quadratic curved mirror of the transmitting system and receiving system antenna device, (61, (6') is the rotating quadratic mirror of the transmitting system and receiving system antenna device @2 sub-reflectors consisting of curved mirrors,
(71, (7') are the main reflecting mirrors of the transmitting system and receiving system antenna devices, and the reflecting mirrors are configured so as to cancel out the cross-polarized components generated in each reflecting mirror.Furthermore, ( 9) is a receiving system antenna device, a corrugated horn (
The waveguide is rotatable around the tube axis connected to the power feeding end of 4') and has an oval internal cross-sectional shape. In addition, (11
, (2L (2'l.(8)#(8')) are similar to those shown in FIG.
送信系アンテナ装置の偏分波器（２）から給電された電
波は、コルゲートホーン（４）や第１副反射鏡（５）お
よび第２副反射鏡（６）を経由して、主反射鏡（７）よ
り交さ偏波成分をほとんど発生させず伝搬路（１１へ放
射される。The radio waves fed from the polarization splitter (2) of the transmission antenna device pass through the corrugated horn (4), the first sub-reflector (5) and the second sub-reflector (6), and then reach the main reflector. (7), it is radiated to the propagation path (11) with almost no cross-polarized components generated.
この伝搬路（１）上で反射波（８′）が生じ、しかも。A reflected wave (8') is generated on this propagation path (1).
反射点での反射係数が大きい場合には、受信系アンテナ
装置には、直接波（８）と反射波（８′）が同時に受信
され１反射波（７′）が反射のさいに偏波の傾きか生じ
ている場合には、直接波（７）との合成によりだ円偏波
となシ、シかも上記だ円偏波のｌＩ！ＩＩＩは、垂直も
しくは水平から傾いている。このとき、受信系アンテナ
装置は、送信系アンテナ装置と同様に交さ偏波成分の発
生しないコルゲートホーン（４′）の使用と、それぞれ
の反射鏡で発生する交さ偏波成分を相殺するように反射
鏡（５’）、（ｉｓ’）、（７’）が構成されているが
１反射鏡の大きさが有限であることや、使用する電波の
波長が光に比較して長いこと等から、アンテナ系で発生
する交さ偏波成分を完全に除去できず、交さ偏波ピーク
レベルが−３０ｄＢ以下程度残留分として残る。この場
合。When the reflection coefficient at the reflection point is large, the receiving system antenna device receives the direct wave (8) and the reflected wave (8') at the same time, and one reflected wave (7') changes polarization during reflection. If there is a tilt, it may be combined with the direct wave (7) to become an elliptical polarized wave. III is tilted from vertical or horizontal. At this time, the receiving system antenna device uses a corrugated horn (4') that does not generate cross-polarized wave components, similar to the transmitting system antenna system, and cancels the cross-polarized wave components generated by each reflecting mirror. is composed of reflecting mirrors (5'), (is'), and (7'), but the size of each reflecting mirror is finite, and the wavelength of the radio waves used is longer than that of light. Therefore, the cross-polarized wave components generated in the antenna system cannot be completely removed, and the cross-polarized wave peak level remains as a residual component of about −30 dB or less. in this case.
上記だ円偏波はほぼそのままの形を保ち、上記反射鏡（
７’） 、（６’） 、 （５’）およびコルゲートホ
ーン（４’）。The above-mentioned elliptical polarized wave maintains almost the same shape, and the above-mentioned reflecting mirror (
7'), (6'), (5') and corrugated horn (4').
だ内溝波管（９）を経由して偏分波器（２′）へ到達す
る。It reaches the polarization splitter (2') via the inner groove wave tube (9).
このとき、受信系アンテナ装置の水平面内の方向調整は
、交さ偏波パターンの左右のピークが等しくなるように
上記偏分波器（２′）を調整して、上記交さ偏波パター
ンのヌル点に設矩する。この場合。At this time, the direction adjustment in the horizontal plane of the receiving system antenna device is performed by adjusting the polarization splitter (2') so that the left and right peaks of the crossed polarization pattern are equal. Set a rectangle at the null point. in this case.
受信電波がだ円偏波であるため第２図に示すように、
Ｖｘ、 Ｈｘの識別度の最大値は急しゅんでなくなる
が、上記だ内溝波管（９）の調整および上述したよりな
偏分波器り）の調整を交互にくり返すことにより、第３
図に示すように反射係数の大きい伝搬路（１）において
もマイクロ波ディジタル方式に必賛なアンテナ装置系の
交さ偏波識別度４４ｄＢ以上は確保できる。Since the received radio waves are elliptical polarized waves, as shown in Figure 2,
Although the maximum value of the discrimination degree of Vx and Hx suddenly disappears, by alternately repeating the adjustment of the inner groove wave tube (9) and the adjustment of the polarization splitter described above, the third
As shown in the figure, even in the propagation path (1) with a large reflection coefficient, it is possible to secure a cross-polarization discrimination of 44 dB or more for the antenna system, which is essential for microwave digital systems.
なお、上記実施例では、受信系アンテナ装置の反射鏡を
３枚としたが、２枚以上の複数枚であればよい。In the above embodiment, the reception system antenna device has three reflecting mirrors, but any number of reflecting mirrors of two or more may be used.
以上のように、この発明によれは、送信系および受信系
アンテナ装置に反射鏡で発生する交さ偏波成分を相殺す
るよう構成された複数枚の反射鏡からなるアンテナおよ
びコルゲートホーンと受信系アンテナ装置のコルゲート
ホーンの給電端にだ内溝波管を接続したため、伝搬路で
発生するだ円偏波を直線偏波に変換し、良好な交さ偏波
識別度特性が得られる効果かめる。As described above, according to the present invention, an antenna consisting of a plurality of reflecting mirrors configured to cancel out cross-polarized components generated by the reflecting mirrors in a transmitting system and a receiving system antenna device, a corrugated horn, and a receiving system are provided. By connecting an internal groove wave tube to the feeding end of the corrugated horn of the antenna device, the elliptical polarization generated in the propagation path is converted to linear polarization, and the effect of obtaining good cross-polarization discrimination characteristics can be seen.
第１図はこの発明の一実施例のアンテナ装ｆＭ系を示す
図、１８１４２図、第３図は交さ偏波識別度特性を示す
図、第４図は従来のアンテナ装置系を示す図、第５図は
送信および受信の偏波識別度特性を示す図であり９図中
（１）は伝搬路、（２）、（２′）は偏分波器、 ＋３
１． （５’）はホーン、 ＋４１． （４’）は
コルゲートホーン、 ＋５１． （５’）は第１副反
射鏡、 （６１，（６’）は第２副反射鏡、（７）、
（７’）は主反射鏡、（８）は直接波、 （８’）
は反射波、（９）ｉ−１だ内溝波管である。
なお９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。FIG. 1 is a diagram showing an antenna system fM system according to an embodiment of the present invention, FIG. 18142 is a diagram showing crossed polarization discrimination characteristics, and FIG. 4 is a diagram showing a conventional antenna system Figure 5 is a diagram showing the polarization discrimination characteristics of transmission and reception. In Figure 9, (1) is the propagation path, (2) and (2') are the polarization splitters, and +3
1. (5') is a horn, +41. (4') is a corrugated horn, +51. (5') is the first sub-reflector, (61, (6') is the second sub-reflector, (7),
(7') is the main reflector, (8) is the direct wave, (8')
is a reflected wave, (9) i-1 inner groove wave tube. Note that the same or corresponding parts in FIG. 9 are designated by the same reference numerals.
Claims (1)
テナおよび偏波を分離する偏分波器からなるアンテナ装
置がそれぞれ空間的に所定の距離離れて対向する送信・
受信系アンテナ装置において、上記複数個の反射鏡をそ
れぞれの反射鏡で発生する交さ偏波成分を幾何光学的に
相殺するように構成し、上記受信系アンテナ装置のホー
ンと偏分波器の間に管軸を中心に回転可能で内部の断面
形状がだ円形の導波管を挿入し、まず、水平面の交さ偏
波パターンの左右のピークが同一レベルとなるように上
記偏分波器を調整後、上記だ円形の導波管を所定の角度
回転することにより、アンテナ正面方向における交さ偏
波識別度を４４ｄＢ以上としたことを特徴とするアンテ
ナ装置系。An antenna device consisting of a horn as a primary radiator, an antenna consisting of a plurality of reflecting mirrors, and a polarization demultiplexer that separates polarized waves is a transmitter and an antenna device that faces each other at a predetermined spatial distance.
In the receiving antenna device, the plurality of reflecting mirrors are configured to geometrically and optically cancel the cross-polarized components generated by each reflecting mirror, and the horn of the receiving antenna device and the polarization splitter are A waveguide that is rotatable around the tube axis and has an oval internal cross-section is inserted between them, and the polarization splitter is first set so that the left and right peaks of the crossed polarization patterns on the horizontal plane are at the same level. An antenna device system characterized in that the cross-polarized wave discrimination degree in the front direction of the antenna is set to 44 dB or more by rotating the oval waveguide by a predetermined angle after adjusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7701685A JPS61234602A (en) | 1985-04-11 | 1985-04-11 | Antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7701685A JPS61234602A (en) | 1985-04-11 | 1985-04-11 | Antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61234602A true JPS61234602A (en) | 1986-10-18 |
Family
ID=13621956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7701685A Pending JPS61234602A (en) | 1985-04-11 | 1985-04-11 | Antenna system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61234602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0197001A (en) * | 1987-10-09 | 1989-04-14 | Mitsubishi Electric Corp | Waveguide type phase shifter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57143903A (en) * | 1981-03-03 | 1982-09-06 | Nippon Telegr & Teleph Corp <Ntt> | Antenna device |
| JPS599601B2 (en) * | 1978-04-17 | 1984-03-03 | インコ・リミテツド | Method for producing metal and alloy granules |
-
1985
- 1985-04-11 JP JP7701685A patent/JPS61234602A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS599601B2 (en) * | 1978-04-17 | 1984-03-03 | インコ・リミテツド | Method for producing metal and alloy granules |
| JPS57143903A (en) * | 1981-03-03 | 1982-09-06 | Nippon Telegr & Teleph Corp <Ntt> | Antenna device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0197001A (en) * | 1987-10-09 | 1989-04-14 | Mitsubishi Electric Corp | Waveguide type phase shifter |
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