JPS61213782A - Radar equipment - Google Patents
Radar equipmentInfo
- Publication number
- JPS61213782A JPS61213782A JP60057320A JP5732085A JPS61213782A JP S61213782 A JPS61213782 A JP S61213782A JP 60057320 A JP60057320 A JP 60057320A JP 5732085 A JP5732085 A JP 5732085A JP S61213782 A JPS61213782 A JP S61213782A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- switch
- output signal
- calibration
- command
- 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
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、レーダ装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a radar device.
航空機及び人工衛星寺のプラットフォームに搭載される
合成開口レーダ（ＳＡＲ）等のレーダ装置では、何度も
繰り返して観測を実施する。Radar equipment such as synthetic aperture radar (SAR) mounted on aircraft and satellite platforms repeatedly performs observations.
長期間にわたって観測を実施すると、経年変化等の影響
によりレーダ装置の特性が劣化する。レーダ装置におい
ては、受信部の１７ ニアリティや飽和レベルに変化を
生じる。特に、合成開ロレーダ等ハ、コヒーレント・レ
ーダの一種であり、受信部のリニアリティや飽和レベル
の変化は観測データの撮幅特性、位相特性の劣化となる
ため地上で画像処理した時に高品質な画像が得られない
という欠点がある。また、長期間にわたって同一場所の
観測データを得たい時に、受信部等の劣化によるレーダ
装置の性能の変化は、観測データの変化となり、従来の
データとの比較ができなくなるという欠点があった。If observation is carried out over a long period of time, the characteristics of the radar device will deteriorate due to aging and other effects. In radar equipment, changes occur in the 17 sensitivity and saturation level of the receiver. In particular, synthetic open radars are a type of coherent radar, and changes in the linearity and saturation level of the receiver degrade the field of view and phase characteristics of the observation data, so it is difficult to obtain high-quality images when processed on the ground. The disadvantage is that it cannot be obtained. Furthermore, when it is desired to obtain observation data from the same location over a long period of time, a change in the performance of the radar device due to deterioration of the receiver or the like results in a change in the observation data, making it impossible to compare with conventional data.
本発明は、航空機及び人工衛星等のプラットフォームに
搭ａされる合成開口レーダ等のレーダ装置において、レ
ーダ装置内で必要な周波数を発生する周波数合成器と、
チャープ信号を発生するパルス変調器と、チャープ信号
を周波数変換する周波数変換器と、劃−器からのコマン
ドによって周波数変換器の出力信号の切替を行う第１の
切替器と、この第１の切替器の出力を所定のレベルまで
増幅器する電力増幅器と、制御器からのコマンドによっ
て第１の切替器の出力信号と周波数合成器の出力信号の
切替を行う第２の切替器と、第２の切替器の出力信号で
ある校正信号を劃−器からのコマンドによって任意のレ
ベルに変化できるディジタル・アッテネータと、校正信
号を発生させないダミーと、電力増幅器°の出力信号で
ある送信信号とディジタル・アッテネータの出力信号で
校正信号とアンテナ部からの受信信号を分波する送受切
替器と、地上に送信信号を放射し地上からの反射信号を
受信するアンテナ部と、送受切替器の出力信号を増幅し
信号処理系に送る受信部と、コマンドてよってディジタ
ル・アッテネータの７ツテネータのアッテネータのア、
テネーシ、ンレベルの制御と＠ｌの切替器及び第２の切
替器の側斜を行う劃−器を有している。The present invention provides a frequency synthesizer that generates a necessary frequency within the radar device in a radar device such as a synthetic aperture radar mounted on a platform such as an aircraft or an artificial satellite;
a pulse modulator that generates a chirp signal, a frequency converter that converts the frequency of the chirp signal, a first switch that switches the output signal of the frequency converter in response to a command from the modulator, and this first switch. a power amplifier that amplifies the output of the frequency synthesizer to a predetermined level; a second switch that switches between the output signal of the first switch and the output signal of the frequency synthesizer according to a command from the controller; A digital attenuator that can change the calibration signal, which is the output signal of the power amplifier, to any level according to a command from the amplifier, a dummy that does not generate a calibration signal, and a digital attenuator that can change the output signal of the power amplifier, which is the transmission signal, and the digital attenuator. There is a transmitter/receiver switch that separates the calibration signal and the received signal from the antenna section using the output signal, an antenna section that emits the transmitted signal to the ground and receives the reflected signal from the ground, and amplifies the output signal of the transmitter/receiver switcher and converts it into a signal. The reception section that sends it to the processing system, and the attenuator of the digital attenuator depending on the command,
It has a gear that controls the tension and level, a switch for @I, and a side tilt for the second switch.
以下図面を参照しながら本発明の詳細な説明する。 The present invention will be described in detail below with reference to the drawings.
図に示すように、本発明は、アンテナ部ｌｌ。As shown in the figure, the present invention includes an antenna section ll.
送受切替器１２．受信部１３．電力増幅器１４゜切替器
（１）１５．周波数変換器１６．パルス変調器１７．デ
ィジタル・７ツテネーＣ１ｓ、ダミー１９、切替器（２
）２０．周波数合成器２１．制御器２２から構成される
。Transmission/reception switch 12. Receiving unit 13. Power amplifier 14° switch (1) 15. Frequency converter 16. Pulse modulator 17. Digital 7-tune C1s, dummy 19, switch (2
)20. Frequency synthesizer 21. It is composed of a controller 22.
周波数合成器２１は、パルスに調器１７．周波数変換器
１６．切替器（２）２０．受信部１３．劃−器２２等の
レーダ装置内で必要な周波数（ＣＷ倍信号を発生する。The frequency synthesizer 21 modulates the pulses 17. Frequency converter 16. Switching device (2)20. Receiving unit 13. A necessary frequency (CW multiplied signal) is generated within a radar device such as the transducer 22.
パルス変調器１７は、周波数合成器２１からＣＷ倍信号
パルス変調し、且つ。The pulse modulator 17 pulse-modulates the CW multiplied signal from the frequency synthesizer 21.
線形周波数変調を行いチャープ信号を発生する。Generates a chirp signal by performing linear frequency modulation.
周波数変換器１６は、周波数合成器２１からのＣＷ倍信
号基にパルス変調器１７の出力信号であるチャープ信号
を周波数変換して切替ｇｉ）ｉｓに送る０切替器（１）
１５は、制御器２２からのコマンドによって電力増幅器
１４または切替器（−２）１９に信号を送る。切替器（
１）１５から電力増幅器１４に送られる信号は実際に観
測を行う時に使用される送信信号である０電力増幅器１
４は所定のレベルまで送信信号を増幅し送受切替器１２
に送る。切替器０） １５から切替器（２）２０に送ら
れる信号はパルス変調されたチャープ信号によって受信
部１３のリニアリティや飽和レベル等の測定（校正）に
使用される校正信号である。周波数合成器２１から切替
器（２）２０に送られるＣＷ倍信号、受信部１３のリニ
アリティや飽和レベル等の測定（校正）に使用される校
正信号である０切替器（２）２０は、制御器２２からの
コマンドによって切替器（１） １５からのチャープ信
号が周波数合成器２１からのＣＷ倍信号校正信号として
使用するか選択される０校正信号を使用しない場合、制
御器２２からのコマンドによって校正信号はダミー１９
にいく。ディジタル・アッテネータ１８は、制御器２２
からのコマンド罠よって切替９２） ２０の出力信号で
ある校正信号を任意にアッテネーシヨンできる。ディジ
タル・アッテネータ１８の出力信号である校正信号は送
受切替器１２に送られる。The frequency converter 16 converts the frequency of the chirp signal, which is the output signal of the pulse modulator 17, based on the CW signal from the frequency synthesizer 21 and sends it to the switch gi)is.
15 sends a signal to the power amplifier 14 or switch (-2) 19 according to a command from the controller 22. Switcher (
1) The signal sent from power amplifier 15 to power amplifier 14 is the transmission signal used when actually performing observation.
4 is a transmission/reception switch 12 which amplifies the transmission signal to a predetermined level.
send to The signal sent from the switch 0) 15 to the switch 2 20 is a pulse-modulated chirp signal and is a calibration signal used to measure (calibrate) the linearity, saturation level, etc. of the receiver 13. The 0 switch (2) 20, which is a CW multiplied signal sent from the frequency synthesizer 21 to the switch (2) 20, is a calibration signal used to measure (calibrate) the linearity, saturation level, etc. of the receiver 13. The chirp signal from the switch (1) 15 is selected by a command from the controller 22 to be used as the CW signal calibration signal from the frequency synthesizer 21. If the 0 calibration signal is not used, the chirp signal from the switch (1) 15 is selected by a command from the controller 22. The calibration signal is dummy 19
go to. The digital attenuator 18 is connected to the controller 22
The calibration signal which is the output signal of 92) can be arbitrarily attenuated by the command trap from 92). A calibration signal, which is the output signal of the digital attenuator 18, is sent to the duplexer 12.
送受切替器１２は、電力増幅器１４の出力信号である送
信信号をアンテナ部に送る。アンテナ部１１は、送受切
替器１２の出力信号である送信信号を地上に放射し、地
上からの反射信号を受信し送受切替器１２の出力信号で
ある送信信号を地上に放射し、地上からの反射信号を受
信し送受切替器１２に受信信号（反射信号）を送る０送
受切替器１２は、電力増幅器１４の出力信号である送信
１言号とディジタル・アッテネータ１８の出力信号であ
る校正信号とアンテナ部１１からの受信信号を分波する
。The transmission/reception switch 12 sends a transmission signal, which is an output signal of the power amplifier 14, to the antenna section. The antenna section 11 radiates a transmission signal, which is an output signal of the transmission/reception switch 12, to the ground, receives a reflected signal from the ground, and radiates a transmission signal, which is an output signal of the transmission/reception switch 12, to the ground. The transmitter/receiver switcher 12 receives the reflected signal and sends the received signal (reflected signal) to the transmitter/receiver switcher 12. The received signal from the antenna section 11 is demultiplexed.
受信部１３は、送受切替器１２の出力信号（受信信号１
校正値号）を増幅し信号処理系に送る。The receiving unit 13 receives the output signal of the transmitting/receiving switch 12 (receiving signal 1
Calibration value) is amplified and sent to the signal processing system.
受信信号は実際に取得されるＳＡＲの観測データである
。校正信号はレーダ装置の特性１例えば。The received signal is SAR observation data that is actually acquired. The calibration signal is based on characteristics 1 of the radar device, for example.
受信部のりエアリティ。飽和レベル等の情報を含むデー
タであり、地上での画像処理に使用される。Receiver Nori Airity. This data includes information such as saturation level, and is used for image processing on the ground.
本発明は、以上説明した構成によって、受信部の入力レ
ベルを変化させる校正信号を受信部に入力させ、受信部
の飽和レベル及びリニアリティの測定（校正）を行い、
地上での画像処理時に校正データを利用することによっ
て、高品質な画像を得ることができる効果がある。With the configuration described above, the present invention inputs a calibration signal that changes the input level of the receiving section to the receiving section, measures (calibrates) the saturation level and linearity of the receiving section,
By using calibration data during image processing on the ground, it is possible to obtain high-quality images.
図は本発明の実施例を示す回路図である。
１１・・・・・・アンテナ部、１２・・・・・・送受切
替器、１３・・・・・・受信部、１４・・・・・・電力
増幅器、１５゜２０・・・・・切替器、１６・・・・・
・周波数合成器、１７・・・・・・パルス変調器、１８
・・・・・ディジタル・アッテネータ、１９・・・・・
・ダミー、２１・・・・・・周波数合成器、２２・・・
・・・劃−器。The figure is a circuit diagram showing an embodiment of the present invention. 11... Antenna section, 12... Transmission/reception switch, 13... Receiving section, 14... Power amplifier, 15°20... Switching Vessel, 16...
・Frequency synthesizer, 17...Pulse modulator, 18
...Digital attenuator, 19...
・Dummy, 21... Frequency synthesizer, 22...
...A weapon.
Claims (1)
合成開口レーダ等のレーダ装置において、レーダ装置内
で必要な周波数を発生する周波数合成器と、チャープ信
号を発生するパルス変調器と、前記チャープ信号を周波
数変換する周波数変換器と、制御器からのコマンドによ
って周波数変換器の出力信号の切替を行う第１の切替器
と、この第１の切替器の出力を所定のレベルまで増幅す
る電力増幅器と、前記制御器からのコマンドによって前
記第１の切替器の出力信号と前記周波数合成器の出力信
号の切替を行う第２の切替器と、この第２の切替器の出
力信号である校正信号を前記制御器からのコマンドによ
って任意のレベルに変化できるディジタル・アッテネー
タと、校正信号を発生させないダミーと、前記電力増幅
器の出力信号である送信信号と前記ディジタル・アッテ
ネータの出力信号である校正信号とアンテナ部からの受
信信号を分波する送受切替器と、地上に送信信号を放射
し地上からの反射信号を受信するアンテナ部と、前記送
受切替器の出力信号を増幅し信号処理系に送る受信部と
、コマンドによって前記ディジタル・アッテネータのア
ッテネーションレベルの制御と前記第１の切替器及び第
２の切替器の制御を行う制御器を備えることを特徴とす
るレーダ装置。In a radar device such as a synthetic aperture radar mounted on a platform such as an aircraft or an artificial satellite, the radar device includes a frequency synthesizer that generates a necessary frequency, a pulse modulator that generates a chirp signal, and a frequency synthesizer that generates a chirp signal. a frequency converter to convert, a first switch that switches the output signal of the frequency converter according to a command from a controller, a power amplifier that amplifies the output of the first switch to a predetermined level; a second switch that switches between the output signal of the first switch and the output signal of the frequency synthesizer according to a command from a controller; and a calibration signal that is the output signal of the second switch that controls the calibration signal. a digital attenuator that can be changed to an arbitrary level according to a command from the device, a dummy that does not generate a calibration signal, a transmission signal that is the output signal of the power amplifier, a calibration signal that is the output signal of the digital attenuator, and an antenna section. a transmitting/receiving switch that separates the received signal from the transmitting/receiving switch; an antenna section that emits the transmitting signal to the ground and receives the reflected signal from the ground; and a receiving section that amplifies the output signal of the transmitting/receiving switch and sends it to a signal processing system; A radar device comprising: a controller that controls an attenuation level of the digital attenuator and controls the first switch and the second switch according to a command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60057320A JPS61213782A (en) | 1985-03-20 | 1985-03-20 | Radar equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60057320A JPS61213782A (en) | 1985-03-20 | 1985-03-20 | Radar equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61213782A true JPS61213782A (en) | 1986-09-22 |
Family
ID=13052283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60057320A Pending JPS61213782A (en) | 1985-03-20 | 1985-03-20 | Radar equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61213782A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124978A (en) * | 1986-11-13 | 1988-05-28 | Nec Corp | Range compression simulation device |
| JP2003149324A (en) * | 2001-11-08 | 2003-05-21 | Mitsubishi Electric Corp | Minimum receiving sensitivity check device of radar device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396797A (en) * | 1977-02-04 | 1978-08-24 | Toshiba Corp | Self-diagnosis apparatus of radar receiving system |
| JPS5712377A (en) * | 1980-06-26 | 1982-01-22 | Mitsubishi Electric Corp | Monopulse radar testing device |
-
1985
- 1985-03-20 JP JP60057320A patent/JPS61213782A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396797A (en) * | 1977-02-04 | 1978-08-24 | Toshiba Corp | Self-diagnosis apparatus of radar receiving system |
| JPS5712377A (en) * | 1980-06-26 | 1982-01-22 | Mitsubishi Electric Corp | Monopulse radar testing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63124978A (en) * | 1986-11-13 | 1988-05-28 | Nec Corp | Range compression simulation device |
| JPH0545194B2 (en) * | 1986-11-13 | 1993-07-08 | Nippon Electric Co | |
| JP2003149324A (en) * | 2001-11-08 | 2003-05-21 | Mitsubishi Electric Corp | Minimum receiving sensitivity check device of radar device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9071337B2 (en) | Wideband transmitter/receiver arrangement for multifunctional radar and communication | |
| US7327802B2 (en) | Method and apparatus for canceling the transmitted signal in a homodyne duplex transceiver | |
| US5264852A (en) | Satellite equipment for measuring the backscatter coefficient of the sea | |
| US4014021A (en) | Radar for short range measurements | |
| US3685050A (en) | Single antenna signal retransmission device | |
| CN107045148B (en) | Ground penetrating radar | |
| JPH0587919A (en) | Polarimetric synthetic aperture radar apparatus | |
| KR102305079B1 (en) | Impulse radar transceiver for compensating path loss | |
| JP2697720B2 (en) | Polarimetry synthetic aperture radar system | |
| JPS61213782A (en) | Radar equipment | |
| US3836966A (en) | Dual mode radar system | |
| JPH06230108A (en) | Absolute calibration device for radar | |
| US5289188A (en) | High resolution radar system for high speed and satellite vehicles | |
| JPS61213783A (en) | Radar equipment | |
| JPS61215980A (en) | Synthetic aperture radar device | |
| JP3573430B2 (en) | Radar equipment | |
| KR20180097022A (en) | Hybrid microwave imaging system and operating method thereof | |
| US5061933A (en) | Short-range radar system | |
| JPS61213786A (en) | Synthetic aperture radar equipment | |
| JP2005197774A (en) | Microwave frequency converter | |
| JPH03130683A (en) | Synthetic aperture radar apparatus | |
| US3449746A (en) | Integral radar test system | |
| JPH02287176A (en) | Method and instrument for measuring stability in radar transmission/reception | |
| JPS61180172A (en) | Radar equipment | |
| JPH05312939A (en) | Radar apparatus |