JPH0566261A - Composite feed type radar antenna - Google Patents
Composite feed type radar antennaInfo
- Publication number
- JPH0566261A JPH0566261A JP3227372A JP22737291A JPH0566261A JP H0566261 A JPH0566261 A JP H0566261A JP 3227372 A JP3227372 A JP 3227372A JP 22737291 A JP22737291 A JP 22737291A JP H0566261 A JPH0566261 A JP H0566261A
- Authority
- JP
- Japan
- Prior art keywords
- primary
- antenna
- radar antenna
- radar
- 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.)
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複合給電形レーダ空中
線のサイドローブ低減装置に利用する。特に、空港監視
レーダ（ＡＳＲ）と二次監視レーダ（ＳＳＲ）とで二次
反射板を共用する複合給電形レーダ空中線のサイドロー
ブ低減装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a side lobe reducing device for a compound feed type radar antenna. In particular, the present invention relates to a side-lobe reducing device for a compound-fed radar antenna in which a secondary reflector is shared by an airport surveillance radar (ASR) and a secondary surveillance radar (SSR).
【０００２】[0002]
【従来の技術】図４は従来例の複合給電形レーダ空中線
のブロック構成図である。図５は従来例の複合給電形レ
ーダ空中線の測定指向性を示す図である。2. Description of the Related Art FIG. 4 is a block diagram of a conventional compound feed type radar antenna. FIG. 5 is a diagram showing the measurement directivity of a conventional compound-fed radar antenna.
【０００３】従来、複合給電形レーダ空中線は、図４に
示すように一次レーダ空中線の一次給電部であるホーン
空中線１の両脇に対称に二次レーダ空中線の一次給電部
である一次反射板１３ａ、１３ｂを有する四つのダイポ
ール素子１２ａ〜１２ｄを備えている。反射板空中線の
一次給電部は、二次反射板の焦点に設置されなければな
らないが、複合給電形レーダ空中線では二種類の一次給
電部を焦点に設置することは不可能であるために、一次
レーダ送受信装置５の高周波信号出力が大電力の一次レ
ーダ空中線の一次給電部であるホーン空中線１を二次反
射板７の焦点に設置し、その両脇に対称に二次レーダ空
中線の一次給電部であるダイポール空中線１２ａ〜１２
ｄを設置し、二次レーダ送受信装置６の高周波信号出力
を電力分配器４で対称に分配することにより、二次レー
ダ空中線の一次給電部の中心を二次反射板７の焦点に合
わせることが可能となる。Conventionally, as shown in FIG. 4, a compound feed type radar antenna has a primary reflector 13a which is a primary feed portion of a secondary radar antenna symmetrically on both sides of a horn antenna 1 which is a primary feed portion of a primary radar antenna. , 13b having four dipole elements 12a to 12d. The primary feeder of the reflector antenna must be installed at the focal point of the secondary reflector, but it is not possible to install two types of primary feeders at the focal point in the compound-fed radar antenna, so the primary antenna The high frequency signal output of the radar transmitter / receiver 5 is provided with a horn antenna 1 which is a primary power feeding part of a high power primary radar antenna at the focal point of the secondary reflector 7, and the primary power feeding parts of the secondary radar antenna are symmetrically arranged on both sides thereof. Dipole antennas 12a-12
d is installed and the high frequency signal output of the secondary radar transmitter / receiver 6 is symmetrically distributed by the power distributor 4 so that the center of the primary power feeding portion of the secondary radar antenna can be focused on the secondary reflector 7. It will be possible.
【０００４】二次レーダ空中線の一次給電部であるダイ
ポール素子１２ａ〜１２ｄには、二次反射板７と反対方
向への輻射を減少させるために、一次反射板１３ａ、１
３ｂが用いられる。The dipole elements 12a to 12d, which are the primary feeding parts of the secondary radar antenna, have the primary reflectors 13a and 1d in order to reduce radiation in the direction opposite to the secondary reflector 7.
3b is used.
【０００５】二次反射板７の焦点に設置された二つの一
次給電部から輻射された高周波信号はそれぞれ二次反射
板７で反射され、所望の指向性で空間に輻射される。The high-frequency signals radiated from the two primary power feeding portions provided at the focal point of the secondary reflection plate 7 are reflected by the secondary reflection plate 7 and radiated into the space with a desired directivity.
【０００６】[0006]
【発明が解決しようとする課題】しかし、このような従
来例の複合給電形レーダ空中線では、一次レーダ空中線
の一次給電部であるホーン空中線から輻射された高周波
信号の一部が二次レーダ空中線の一次給電部の一次反射
板で反射され、これがホーン空中線から二次反射板方向
に輻射された高周波信号と合成された結果、ホーン空中
線の輻射指向性が歪み、一次レーダ空中線として輻射指
向性のサイドローブが増大する問題点があった。However, in such a conventional compound feed type radar antenna, a part of the high frequency signal radiated from the horn antenna which is the primary feeder of the primary radar antenna is of the secondary radar antenna. As a result of being reflected by the primary reflector of the primary feeding part and being combined with the high-frequency signal radiated from the horn antenna toward the secondary reflector, the radiation directivity of the horn antenna is distorted, and the radiation directivity side as the primary radar antenna. There was a problem that the robe increased.
【０００７】本発明は上記の問題点を解決するもので、
一次レーダ空中線の一次給電部であるホーン空中線の輻
射指向性に対する二次レーダ空中線の一次反射板の影響
を減少することができる複合給電方式反射板空中線を提
供することを目的とする。The present invention solves the above problems.
It is an object of the present invention to provide a combined feeding type reflector antenna which can reduce the influence of the primary reflector of the secondary radar antenna on the radiation directivity of the horn antenna which is the primary feeder of the primary radar antenna.
【０００８】[0008]
【課題を解決するための手段】本発明は、一次レーダ空
中線の一次給電部を構成するホーン空中線と、このホー
ン空中線の両側に対称に設けられ二次レーダ空中線の一
次給電部を構成する複数対の反射板付ダイポール空中線
とを備え、上記複数対の反射板付ダイポール空中線はそ
れぞれ、ダイポール素子と、一次反射板とを含む複合給
電形レーダ空中線において、上記複数対の反射板付ダイ
ポール空中線の一次反射板は上記ホーン空中線の開口か
らの距離がはなれるにしたがいサイドローブが打消され
るような段構造に形成されたことを特徴とする。DISCLOSURE OF THE INVENTION The present invention is directed to a horn antenna which constitutes a primary feeding portion of a primary radar antenna, and a plurality of pairs which are symmetrically provided on both sides of the horn antenna and constitute a primary feeding portion of a secondary radar antenna. A dipole antenna with a reflector, each of the plurality of pairs of dipole antennas with a reflector is a dipole element and a composite feed type radar antenna including a primary reflector, wherein the plurality of pairs of dipole antennas with a reflector are primary reflectors. It is characterized in that it is formed in a stepped structure in which side lobes are canceled as the distance from the opening of the horn antenna increases.
【０００９】また、本発明は、上記複数対は二対からな
り二対の反射板付ダイポール空中線の一次反射板の上記
ホーン空中線の開口との距離の差が一次レーダ空中線の
高周波信号の波長のほぼ１／４であることができる。Further, in the present invention, the plurality of pairs are made up of two pairs, and the difference in distance between the primary reflectors of the dipole antenna with two reflectors and the opening of the horn antenna is substantially equal to the wavelength of the high frequency signal of the primary radar antenna. It can be 1/4.
【００１０】[0010]
【作用】複数対の反射板付ダイポール空中線の一次反射
板はホーン空中線の開口からの距離がはなれるにしたが
いサイドローブが打消されるような段構造に形成されホ
ーン空中線に対する影響を互いに打消し合う。The plurality of pairs of the primary reflectors of the dipole antenna with the reflector are formed in a step structure in which the side lobes are canceled as the distance from the opening of the horn antenna increases, and the influences on the horn antenna cancel each other.
【００１１】以上により一次レーダ空中線の一次給電部
であるホーン空中線の輻射指向性に対する二次レーダ空
中線の一次反射板の影響を減少することができる。As described above, it is possible to reduce the influence of the primary reflector of the secondary radar antenna on the radiation directivity of the horn antenna, which is the primary feeder of the primary radar antenna.
【００１２】[0012]
【実施例】本発明の実施例について図面を参照して説明
する。図１は本発明一実施例複合給電形レーダ空中線の
ブロック構成図である。図２は本発明の複合給電形レー
ダ空中線のホーン空中線および反射板付ダイポール空中
線の外観図を示す。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a compound-fed radar antenna according to an embodiment of the present invention. FIG. 2 is an external view of a horn antenna and a dipole antenna with a reflector of the compound-fed radar antenna of the present invention.
【００１３】図１および図２において、複合給電形レー
ダ空中線は、一次レーダ空中線の一次給電部を構成する
ホーン空中線１と、ホーン空中線１の両側に対称に設け
られ二次レーダ空中線の一次給電部を構成する複数対と
して二対の反射板付ダイポール空中線と、一次レーダ空
中線および二次レーダ空中線で共用する二次反射板７と
を備え、二対の反射板付ダイポール空中線はそれぞれ、
ダイポール素子２ａ〜２ｄと、一次反射板３ａ〜３ｄと
を含む。In FIG. 1 and FIG. 2, a compound-fed radar antenna includes a horn antenna 1 which constitutes the primary feeder of the primary radar antenna and a secondary radar antenna primary feeder which is symmetrically provided on both sides of the horn antenna 1. A plurality of pairs of dipole antennas with a reflector and a secondary reflector 7 shared by the primary radar antenna and the secondary radar antenna are provided as a plurality of pairs, and the two pairs of dipole antennas with a reflector are respectively,
It includes dipole elements 2a-2d and primary reflectors 3a-3d.
【００１４】ここで本発明の特徴とするところは、一次
反射板３ａ〜３ｄはホーン空中線１の開口から距離がは
なれるにしたがいサイドローブが打消されるような段構
造に形成されたことにある。The feature of the present invention is that the primary reflectors 3a to 3d are formed in a step structure in which side lobes are canceled as the distance from the opening of the horn antenna 1 increases. .
【００１５】また、二対の反射板付ダイポール空中線の
一次反射板３ａ〜３ｄのホーン空中線１の開口との距離
の差が一次レーダ空中線の高周波信号の波長のほぼ１／
４である。Further, the difference in distance between the primary reflectors 3a to 3d of the two pairs of dipole antennas with reflectors and the opening of the horn antenna 1 is approximately 1/1 of the wavelength of the high frequency signal of the primary radar antenna.
It is 4.
【００１６】このような構成の複合給電形レーダ空中線
の動作について説明する。図３は本発明の複合給電形レ
ーダ空中線の測定指向性を示す図である。The operation of the compound-fed radar antenna having such a configuration will be described. FIG. 3 is a diagram showing the measurement directivity of the compound-fed radar antenna of the present invention.
【００１７】図１〜図３において、一次レーダ送受信装
置５の高周波信号はホーン空中線１に給電され、二次反
射板７に向かって輻射される。二次反射板７で反射され
た高周波信号は所望の指向性が形成され、空間に輻射さ
れる。受信の場合には、この逆の経路で所望の指向性で
高周波信号が一次レーダ送受信装置５に入力される。1 to 3, the high frequency signal of the primary radar transmitter / receiver 5 is fed to the horn antenna 1 and radiated toward the secondary reflector 7. The high-frequency signal reflected by the secondary reflection plate 7 has a desired directivity and is radiated into space. In the case of reception, a high-frequency signal having a desired directivity is input to the primary radar transmission / reception device 5 through the reverse path.
【００１８】二次レーダ送受信装置６の高周波信号は、
電力分配器４により対称に分配され、それぞれのダイポ
ール素子２ａ〜２ｄに給電される。二次反射板７の焦点
に対称に配列したダイポール素子２ａ〜２ｄに対称に給
電を行うことにより、二次レーダの一次給電部の合成し
た指向性の中心を二次反射板７の焦点を一致させること
が可能である。The high frequency signal of the secondary radar transceiver 6 is
It is symmetrically distributed by the power distributor 4 and is fed to the respective dipole elements 2a to 2d. By supplying power to the dipole elements 2a to 2d symmetrically arranged at the focal point of the secondary reflecting plate 7, the focus of the secondary reflecting plate 7 is made to coincide with the directivity center synthesized by the primary feeding part of the secondary radar. It is possible to
【００１９】ダイポール素子２ａ〜２ｄより輻射された
高周波信号は、二次反射板７方向に輻射されたものと、
二次反射板７と逆方向に輻射され、一次反射板３ａ〜３
ｄによって反射されたものとが合成され、二次反射板７
方向に伝搬し、反射され所望の指向性が形成される。受
信の場合には、この逆の経路で所望の指向性で高周波信
号が二次レーダ送受信装置６に入力される。The high frequency signals radiated from the dipole elements 2a to 2d are those radiated in the direction of the secondary reflection plate 7,
The primary reflectors 3a to 3a are radiated in a direction opposite to that of the secondary reflector 7.
The secondary reflector 7 is combined with that reflected by d.
Propagates in the direction and is reflected to form the desired directivity. In the case of reception, a high-frequency signal is input to the secondary radar transmitter / receiver 6 with a desired directivity in the reverse path.
【００２０】一次レーダ空中線の一次給電部であるホー
ン空中線１は、給電された高周波信号の大部分を二次反
射板７方向へ輻射する特性を有しているが高周波信号の
一部は二次反射板７と逆方向に輻射され、二次レーダ空
中線の一次反射板３ａ〜３ｄにより反射され、二次反射
板７方向へ輻射された高周波信号と合成される。The horn antenna 1 which is the primary power feeding portion of the primary radar antenna has a characteristic that most of the fed high frequency signal is radiated toward the secondary reflector 7, but a part of the high frequency signal is secondary. It is radiated in the direction opposite to that of the reflector 7, is reflected by the primary reflectors 3a to 3d of the secondary radar antenna, and is combined with the high-frequency signal radiated in the direction of the secondary reflector 7.
【００２１】一次レーダ空中線の一次給電部であるホー
ン空中線１の開口と二次レーダ空中線の一次反射板３
ａ、３ｄとの距離と、ホーン空中線１の開口と二次レー
ダ空中線の一次反射板３ｂ、３ｃとの距離の差とを一次
レーダ空中線の高周波信号の波長の１／４程度とするこ
とにより、ホーン空中線１から一次反射板３ａ、３ｄお
よび一次反射板３ｂ、３ｃを経て二次反射板７に至る経
路差は波長の１／２となり、一次反射板３ａ、３ｄで反
射される信号と一次反射板３ｂ、３ｃで反射される信号
とは互いに打消し合う。したがって、一次反射板３ａ〜
３ｄによる一次レーダ空中線のホーン空中線１への影響
は従来の一段型の一次反射板より小さくできる。The opening of the horn antenna 1 which is the primary feeding part of the primary radar antenna and the primary reflector 3 of the secondary radar antenna.
a and 3d and the difference in distance between the aperture of the horn antenna 1 and the primary reflectors 3b and 3c of the secondary radar antenna are set to about ¼ of the wavelength of the high frequency signal of the primary radar antenna. The path difference from the horn antenna 1 to the secondary reflection plate 7 via the primary reflection plates 3a and 3d and the primary reflection plates 3b and 3c becomes 1/2 of the wavelength, and the signal and the primary reflection reflected by the primary reflection plates 3a and 3d are reduced. The signals reflected by the plates 3b and 3c cancel each other out. Therefore, the primary reflectors 3a-
The influence of the primary radar antenna on the horn antenna 1 by 3d can be made smaller than that of the conventional single-stage primary reflector.
【００２２】空港監視レーダ用空中線を用いた測定の結
果、従来の一段型の一次反射板を用いた場合、図５に示
すように一次レーダ空中線のサイドローブレベルが「−
２２ｄＢ」であったのに対し、本実施例の二段型の一次
反射板を用いた場合には図３に示すようにサイドローブ
レベルが「−２３．９ｄＢ」となり約２ｄＢのサイドロ
ーブの改善効果が得られている。As a result of the measurement using the antenna for airport surveillance radar, when the conventional one-stage primary reflector is used, the side lobe level of the primary radar antenna is "-" as shown in FIG.
22 dB ", the side lobe level becomes" -23.9 dB "as shown in FIG. 3 when the two-stage primary reflector of this embodiment is used, and the side lobe is improved by about 2 dB. The effect is obtained.
【００２３】また、一次反射板以外の構成品は従来のも
のと共通に使用できるために容易かつ安価に実現でき
る。Since the components other than the primary reflector can be used in common with the conventional one, they can be realized easily and at low cost.
【００２４】[0024]
【発明の効果】以上説明したように、本発明は、一次レ
ーダ空中線の一次給電部であるホーン空中線の輻射指向
性に対する二次レーダ空中線の一次反射板の影響を減少
することができる優れた効果がある。As described above, the present invention has an excellent effect that the influence of the primary reflector of the secondary radar antenna on the radiation directivity of the horn antenna, which is the primary feeding section of the primary radar antenna, can be reduced. There is.
【図１】本発明一実施例複合給電形レーダ空中線のブロ
ック構成図。FIG. 1 is a block configuration diagram of a compound-fed radar antenna according to an embodiment of the present invention.
【図２】本発明の複合給電形レーダ空中線のホーン空中
線および反射板付ダイポール空中線の外観図。FIG. 2 is an external view of a horn antenna and a dipole antenna with a reflector of the compound-fed radar antenna of the present invention.
【図３】本発明の複合給電形レーダ空中線の測定指向性
を示す図。FIG. 3 is a diagram showing the measurement directivity of a compound-fed radar antenna of the present invention.
【図４】従来例の複合給電形レーダ空中線のブロック構
成図。FIG. 4 is a block diagram of a conventional compound feed type radar antenna.
【図５】従来例の複合給電形レーダ空中線の測定指向性
を示す図。FIG. 5 is a diagram showing the measurement directivity of a conventional compound-fed radar antenna.
１ ホーン空中線 ２ａ〜２ｄ、１２ａ〜１２ｄ ダイポール素子 ３ａ〜３ｄ、１３ａ〜１３ｄ 一次反射板 ４ 電力分配器 ５ 一次レーダ送受信装置 ６ 二次レーダ送受信装置 ７ 二次反射板 DESCRIPTION OF SYMBOLS 1 Horn antenna 2a-2d, 12a-12d Dipole element 3a-3d, 13a-13d Primary reflector 4 Power distributor 5 Primary radar transceiver 6 Secondary radar transceiver 7 Secondary reflector
Claims (2)
るホーン空中線と、このホーン空中線の両側に対称に設
けられ二次レーダ空中線の一次給電部を構成する複数対
の反射板付ダイポール空中線とを備え、 上記複数対の反射板付ダイポール空中線はそれぞれ、ダ
イポール素子と、一次反射板とを含む複合給電形レーダ
空中線において、 上記複数対の反射板付ダイポール空中線の一次反射板は
上記ホーン空中線の開口からの距離がはなれるにしたが
いサイドローブが打消されるような段構造に形成された
ことを特徴とする複合給電形レーダ空中線。1. A horn antenna that constitutes a primary power feeding portion of a primary radar antenna, and a plurality of pairs of dipole antennas with reflectors that are symmetrically provided on both sides of the horn antenna and that configure a primary feeding portion of a secondary radar antenna. , Each of the plurality of pairs of dipole antennas with a reflector is a compound feed type radar antenna including a dipole element and a primary reflector, and the primary reflectors of the plurality of pairs of dipole antennas with a reflector are a distance from the opening of the horn antenna. A compound-fed radar antenna, characterized in that it is formed in a stepped structure in which side lobes are canceled out as the distance increases.
付ダイポール空中線の一次反射板の上記ホーン空中線の
開口との距離の差が一次レーダ空中線の高周波信号の波
長のほぼ１／４である請求項１記載の複合給電形レーダ
空中線。2. The plurality of pairs are composed of two pairs, and the difference in distance between the primary reflectors of the dipole antenna with two reflectors and the opening of the horn antenna is about 1/4 of the wavelength of the high frequency signal of the primary radar antenna. A composite feed type radar antenna according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3227372A JP2621703B2 (en) | 1991-09-06 | 1991-09-06 | Composite feed radar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3227372A JP2621703B2 (en) | 1991-09-06 | 1991-09-06 | Composite feed radar antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0566261A true JPH0566261A (en) | 1993-03-19 |
| JP2621703B2 JP2621703B2 (en) | 1997-06-18 |
Family
ID=16859776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3227372A Expired - Lifetime JP2621703B2 (en) | 1991-09-06 | 1991-09-06 | Composite feed radar antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2621703B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7753013B2 (en) | 2006-10-30 | 2010-07-13 | Nissan Motor Co., Ltd. | Variable compression ratio control method for variable compression ratio engine, and variable compression ratio engine |
| US7865295B2 (en) | 2007-09-25 | 2011-01-04 | Toyota Jidosha Kabushiki Kaisha | Fuel injection controller of flexible fuel internal combustion engine |
| US7941264B2 (en) | 2008-08-21 | 2011-05-10 | Toyota Jidosha Kabushiki Kaisha | Fuel supply device for flexible-fuel internal combustion engine |
| CN112394234A (en) * | 2019-08-16 | 2021-02-23 | 稜研科技股份有限公司 | Quick aerial production line test platform |
-
1991
- 1991-09-06 JP JP3227372A patent/JP2621703B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7753013B2 (en) | 2006-10-30 | 2010-07-13 | Nissan Motor Co., Ltd. | Variable compression ratio control method for variable compression ratio engine, and variable compression ratio engine |
| US7865295B2 (en) | 2007-09-25 | 2011-01-04 | Toyota Jidosha Kabushiki Kaisha | Fuel injection controller of flexible fuel internal combustion engine |
| US7941264B2 (en) | 2008-08-21 | 2011-05-10 | Toyota Jidosha Kabushiki Kaisha | Fuel supply device for flexible-fuel internal combustion engine |
| CN112394234A (en) * | 2019-08-16 | 2021-02-23 | 稜研科技股份有限公司 | Quick aerial production line test platform |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2621703B2 (en) | 1997-06-18 |
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