JPH056673B2 - - Google Patents
Info
- Publication number
- JPH056673B2 JPH056673B2 JP59084401A JP8440184A JPH056673B2 JP H056673 B2 JPH056673 B2 JP H056673B2 JP 59084401 A JP59084401 A JP 59084401A JP 8440184 A JP8440184 A JP 8440184A JP H056673 B2 JPH056673 B2 JP H056673B2
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- radar
- antenna
- radar device
- interference
- 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 - Lifetime
Links
- 230000010287 polarization Effects 0.000 claims description 57
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/024—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は干渉波の妨害を除去するレーダ装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a radar device that removes interference from interference waves.
第１図は従来のレーダ装置であり、１は鏡面ア
ンテナ、２は送受切換器、３は送信機、４は受信
機、５は信号処理器である。この従来のレーダ装
置では目標探知のため、送信機３で発生したレー
ダ送信信号をアンテナ１から放射し目標からの反
射信号を受信機４で受信して信号処理器５で目標
の探知を行うものである。
FIG. 1 shows a conventional radar device, in which 1 is a mirror antenna, 2 is a transmitter/receiver switch, 3 is a transmitter, 4 is a receiver, and 5 is a signal processor. In this conventional radar device, in order to detect a target, a radar transmission signal generated by a transmitter 3 is emitted from an antenna 1, a reflected signal from the target is received by a receiver 4, and a signal processor 5 detects the target. It is.
ところが従来のレーダ装置では、他の電子装置
からの電波干渉がレーダ装置の目標探知性能の大
きな障害となつており、信号処理器５による妨害
除去機能（例えばパルス積分など）では十分な改
善が得られないという欠点があつた。 However, in conventional radar devices, radio wave interference from other electronic devices is a major impediment to the radar device's target detection performance, and the interference removal function (for example, pulse integration) by the signal processor 5 cannot provide sufficient improvement. The drawback was that I couldn't do it.
この発明は前述の欠点を除去すべくなされたも
のであり、レーダ装置に到来する干渉波の偏波特
性を分析して到来干渉波の偏波と直交する偏波の
レーダ送信信号をレーダアンテナから放射するこ
とにより、到来干渉波の妨害を避けて鮮明な目標
探知を行い得るレーダ装置を提供するものであ
る。
This invention was made to eliminate the above-mentioned drawbacks, and it analyzes the polarization characteristics of interference waves arriving at a radar device and transmits radar transmission signals of a polarization orthogonal to the polarization of the arriving interference waves to the radar antenna. The object of the present invention is to provide a radar device that can clearly detect a target while avoiding interference from incoming interference waves.
第２図はこの発明の一実施例を示すものであ
り、１は鏡面を用いたレーダアンテナ、２は送受
切換器、３は送信機、４は受信機、５は信号処理
器、６は偏分波器、７は偏波合成回路、８は探知
用アンテナ、９は偏分波器、１０は偏波分析装置
である。
FIG. 2 shows an embodiment of the present invention, in which 1 is a radar antenna using a mirror surface, 2 is a transmitter/receiver switch, 3 is a transmitter, 4 is a receiver, 5 is a signal processor, and 6 is a polarizer. 7 is a polarization combining circuit, 8 is a detection antenna, 9 is a polarization splitter, and 10 is a polarization analyzer.
第２図において、探知用アンテナ８は目標から
の反射信号よりレベルの高い到来干渉波のみを受
信するようレーダアンテナ１に比較して利得の低
いアンテナであり、この探知用アンテナ８にて受
信された到来干渉波は偏分波器９にて垂直成分Ｖ
と水平成分Ｈに分解され偏波分析装置１０に導か
れて干渉波の偏波特性が分析される。すなわち、
偏波特性の分析は探知用アンテナ８、偏分波器９
および偏波分析装置１０とで構成されている信号
処理手段により、垂直成分Ｖ（または水平成分Ｈ）
を基準として水平成分Ｈ（または垂直成分Ｖ）の
振幅と位相を比較することにより行える。この分
析結果に従つて、到来干渉波が垂直偏波、水平偏
波、右旋円偏波または左旋円偏波に対応して偏波
合成回路７によりそれぞれ水平偏波、垂直偏波、
左旋円偏波または右旋円偏波に切換え到来干渉波
の偏波と直交する偏波のレーダ送信信号をレーダ
アンテナ１１より放射する。 In FIG. 2, the detection antenna 8 is an antenna with a lower gain than the radar antenna 1 so that it receives only incoming interference waves whose level is higher than the reflected signal from the target. The arriving interference wave is divided into a vertical component V by a polarization splitter 9.
The interfering wave is decomposed into horizontal components H and guided to the polarization analyzer 10, where the polarization characteristics of the interference wave are analyzed. That is,
Analysis of polarization characteristics is performed using a detection antenna 8 and a polarization splitter 9.
and the polarization analyzer 10, the vertical component V (or horizontal component H) is
This can be done by comparing the amplitude and phase of the horizontal component H (or vertical component V) using as a reference. According to this analysis result, the polarization synthesis circuit 7 determines whether the arriving interference wave is vertically polarized, horizontally polarized, right-handed circularly polarized, or left-handed circularly polarized, respectively.
The radar antenna 11 radiates a radar transmission signal having a polarization orthogonal to the polarization of the arriving interference wave by switching to left-handed circular polarization or right-handed circular polarization.
第３図はこの発明の一実施例における偏波合成
回路７の構成例であり、１１ａ〜１１ｅは直線偏
波円偏波切換スイツチ、１２は垂直偏波水平偏波
切換スイツチ、１３は右旋円偏波左旋円偏波切換
スイツチ、１４ａ〜１４ｄは電力分配器、１５ａ
〜１５ｄは3dBのハイブリツド、１６は1/4波長
板である。第３図において、偏波分析装置１０の
分析結果に従つて到来干渉波の偏波と直交する偏
波の合成に関して垂直偏波の場合について説明す
る。 FIG. 3 shows an example of the configuration of the polarization synthesis circuit 7 in an embodiment of the present invention, in which 11a to 11e are linear polarization circular polarization switching switches, 12 is a vertical polarization horizontal polarization switching switch, and 13 is a right-handed polarization switch. Circular polarization left-handed circular polarization switching switch, 14a to 14d are power dividers, 15a
~15d is a 3dB hybrid, and 16 is a 1/4 wavelength plate. In FIG. 3, the case of vertically polarized waves will be described with respect to the synthesis of polarized waves orthogonal to the polarized waves of the arriving interference wave according to the analysis results of the polarization analyzer 10.
送信機３により発生されたレーダ送信信号は送
受信切換器２、スイツチ１１ｅ、スイツチ１２を
通して電力分配器１４ａに導かれ二つに分配され
る。二つの分配された前記レーダ送信信号の一方
はそのまま偏分波器６の垂直偏波端子Ｖに導か
れ、もう一方はハイブリツド１５ｂの差端子Δに
入力され相互の位相関係を逆相としてスイツチ１
１ｂとスイツチ１１ｃを通して偏分波器６の右旋
円偏波端子Ｒと左旋円偏波端子Ｌに導かれる。こ
のように偏分波器６の各端子に導かれた前記レー
ダ送信信号EV，ER，ELは第４図に示すように偏
分波器６の中で電力の損失を生ずることなく合成
され垂直成分のみを有するレーダ送信信号Ｅとな
り第２図のレーダアンテナ１から放射される。ま
た、水平偏波の場合は偏分波器６のＨ，Ｒ，Ｌ端
子にレーダ送信信号が導かれ水平成分のみを有す
るレーダ送信信号と第２図のレーダアンテナ１か
ら放射される。一方、円偏波の場合も同様に、右
旋円偏波（または左旋円偏波）の場合は偏分波器
６のＲ，Ｖ，Ｈ端子（またはＬ，Ｖ，Ｈ端子）に
レーダ送信信号が導かれ1/4波長板１６と45°（ま
たは−45°）の成分のみを有するレーダ送信信号
が合成され1/4波長板１６により右旋円偏波（ま
たは左旋円偏波）となり第２図のレーダアンテナ
１から放射される。 The radar transmission signal generated by the transmitter 3 is guided to the power divider 14a through the transmit/receive switch 2, the switch 11e, and the switch 12, and is divided into two. One of the two divided radar transmission signals is directly guided to the vertical polarization terminal V of the polarization splitter 6, and the other is input to the difference terminal Δ of the hybrid 15b, and the mutual phase relationship is reversed and the switch 1 is input.
1b and switch 11c, it is guided to right-handed circularly polarized wave terminal R and left-handed circularly polarized wave terminal L of polarization splitter 6. As shown in FIG. 4, the radar transmission signals E V , E R , and E L guided to each terminal of the polarization splitter 6 are transmitted through the polarization splitter 6 without causing power loss. The combined signals become a radar transmission signal E having only a vertical component and are radiated from the radar antenna 1 shown in FIG. In the case of horizontal polarization, the radar transmission signal is guided to the H, R, and L terminals of the polarization splitter 6, and is radiated from the radar antenna 1 shown in FIG. 2 as a radar transmission signal having only a horizontal component. On the other hand, in the case of circularly polarized waves, similarly, in the case of right-handed circularly polarized waves (or left-handed circularly polarized waves), radar is transmitted to the R, V, H terminals (or L, V, H terminals) of the polarization splitter 6. The signal is guided, and the radar transmission signal having only the 45° (or -45°) component is combined with the 1/4 wavelength plate 16 and becomes right-handed circularly polarized (or left-handed circularly polarized) by the 1/4 wavelength plate 16. It is radiated from the radar antenna 1 shown in FIG.
上記方法によれば干渉波の妨害を受けない信号
形式を有する自己相関の強いレーダ送信信号が目
標より反射され受信機４に導かれて送信されるた
め、信号処理器５では到来干渉波の妨害を避けて
目標探知を行うことができる。 According to the above method, the radar transmission signal with strong autocorrelation and having a signal format that is not affected by interference waves is reflected from the target and guided to the receiver 4 for transmission. Target detection can be performed while avoiding.
なお、上記説明では１組の探知用アトンテナ
８、偏分波器９、偏波分析装置１０を１個のレー
ダ装置本体に対応させて使用したが、これらに限
らず地理的に接近した位置に設置される複数個の
レーダ装置本体に１組の探知用アンテナ８、偏分
波器９、偏波分析装置１０を共通に使用すること
もできる。 In the above explanation, a set of detection atontenas 8, polarization splitters 9, and polarization analyzers 10 are used in correspondence with one radar device main body, but this is not limited to these, and it can also be used in locations that are geographically close to each other. A set of detection antenna 8, polarization splitter 9, and polarization analyzer 10 can also be used in common for a plurality of installed radar device bodies.
以上のようにこの発明によれば、到来干渉波の
妨害を避けて鮮明な目標探知を行い得るレーダ装
置を提供できるという効果がある。
As described above, according to the present invention, it is possible to provide a radar device that can clearly detect a target while avoiding interference from incoming interference waves.
第１図は従来のレーダ装置の構成図、第２図は
この発明によるレーダ装置の一実施例の構成図、
第３図はこの発明による偏波合成回路の構成図、
第４図はこの発明による偏波合成の原理を示す図
である。
図中、１はレーダアンテナ、２は送受切換器、
３は送信機、４は受信機、５は信号処理器、６は
偏分波器、７は偏波合成回路、８は探知用アンテ
ナ、９は偏分波器、１０は偏波分析装置である。
なお、図中同一あるいは相当部分には同一符号を
付して示してある。
FIG. 1 is a configuration diagram of a conventional radar device, and FIG. 2 is a configuration diagram of an embodiment of a radar device according to the present invention.
FIG. 3 is a configuration diagram of a polarization synthesis circuit according to the present invention.
FIG. 4 is a diagram showing the principle of polarization synthesis according to the present invention. In the figure, 1 is a radar antenna, 2 is a transmitter/receiver switch,
3 is a transmitter, 4 is a receiver, 5 is a signal processor, 6 is a polarization splitter, 7 is a polarization synthesis circuit, 8 is a detection antenna, 9 is a polarization splitter, and 10 is a polarization analyzer. be.
It should be noted that the same or corresponding parts in the figures are indicated by the same reference numerals.
Claims (1)
のレーダ装置本体とは別個に設けられ、干渉波の
偏波特性を探知する上記鏡面アンテナより利得の
低い探知用アンテナ、この探知用アンテナで受信
された干渉波を入力し、その垂直成分と水平成分
を取り出す偏分波器、この偏分波器で取り出され
た干渉波を垂直成分と水平成分から干渉波の偏波
特性を分析する偏波分析装置とを備えた信号処理
手段と、上記偏波分析装置の分析結果に従つて上
記レーダ装置本体の送信機から送信されるレーダ
送信信号の偏波特性を到来干渉波の偏波特性と直
交関係となるように調整し、到来干渉波の偏波特
性と直交する偏波特性のレーダ送信信号を上記鏡
面アンテナから放射させるための偏波合成回路お
よび変分波器とを具備したことを特徴とするレー
ダ装置。1 A radar device main body using a mirror antenna, a detection antenna that is provided separately from the radar device main body and has a lower gain than the mirror antenna that detects the polarization characteristics of interference waves, and a detection antenna that uses a mirror antenna to detect the polarization characteristics of interference waves. A polarization demultiplexer inputs the interference wave and extracts its vertical and horizontal components, and a polarization demultiplexer analyzes the polarization characteristics of the interference wave from the vertical and horizontal components of the interference wave extracted by the polarization demultiplexer. a signal processing means comprising an analyzer; and a signal processing means comprising a polarization analyzer, which determines the polarization characteristics of the radar transmission signal transmitted from the transmitter of the radar device body according to the analysis results of the polarization analyzer, and the polarization characteristics of the incoming interference wave. and a polarization combining circuit and a variation waveformer for radiating a radar transmission signal having a polarization characteristic orthogonal to the polarization characteristic of the arriving interference wave from the mirror antenna. A radar device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59084401A JPS60228980A (en) | 1984-04-26 | 1984-04-26 | Radar equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59084401A JPS60228980A (en) | 1984-04-26 | 1984-04-26 | Radar equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60228980A JPS60228980A (en) | 1985-11-14 |
| JPH056673B2 true JPH056673B2 (en) | 1993-01-27 |
Family
ID=13829555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59084401A Granted JPS60228980A (en) | 1984-04-26 | 1984-04-26 | Radar equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60228980A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62226075A (en) * | 1986-03-28 | 1987-10-05 | Mitsubishi Electric Corp | Radar equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3281837A (en) * | 1962-05-23 | 1966-10-25 | Hollandse Signaalapparaten Bv | Radar apparatus provided with an arrangement reacting to interference and jamming bychanging either the polarization direction of the aerial system or the carrier frequency or both |
| US3849781A (en) * | 1963-05-31 | 1974-11-19 | Us Navy | Radar system |
-
1984
- 1984-04-26 JP JP59084401A patent/JPS60228980A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3281837A (en) * | 1962-05-23 | 1966-10-25 | Hollandse Signaalapparaten Bv | Radar apparatus provided with an arrangement reacting to interference and jamming bychanging either the polarization direction of the aerial system or the carrier frequency or both |
| US3849781A (en) * | 1963-05-31 | 1974-11-19 | Us Navy | Radar system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60228980A (en) | 1985-11-14 |
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