CN102175994A - Receiving phase reference made weather radar - Google Patents
Receiving phase reference made weather radar Download PDFInfo
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- CN102175994A CN102175994A CN2011100592176A CN201110059217A CN102175994A CN 102175994 A CN102175994 A CN 102175994A CN 2011100592176 A CN2011100592176 A CN 2011100592176A CN 201110059217 A CN201110059217 A CN 201110059217A CN 102175994 A CN102175994 A CN 102175994A
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Abstract
The invention relates to a receiving phase reference made weather radar. The weather radar comprises a magnetron transmitter; the magnetron transmitter is connected with the output end of a signal processor, and the output end of the magnetron transmitter is connected with an antenna on an antenna pedestal through a transceiving switch; the output end of the magnetron transmitter is connected with a transmitting coupler, and the transmitting coupler couples and inputs the transmitted pulse signals output by the magnetron transmitter to the signal processor; the output end of the transceiving switch is connected with a directional coupler, and the directional coupler couples and inputs the received pulse signals received by the antenna to the signal processor through a first image reject mixer; and both the first image reject mixer and a second image reject mixer are connected with a low-noise high-stability local oscillator, and the low-noise high-stability local oscillator is connected with the output end of the signal processor. The weather radar has a compact structure, meets the using requirements on Doppler weather radars by receiving and processing, has high measurement precision, and is convenient to use, safe and reliable.
Description
Technical field
The present invention relates to a kind of weather radar, especially a kind of reception coherent system weather radar belongs to the technical field of weather radar.
Background technology
LLX06B (promptly 718) digitizing weather radar was the upgraded product of 711 weather radars of the development eighties, in design typification in 1989.Because its stable performance, reliable operation, cost performance advantages of higher, so be provided to army at this digitizing weather radar of short time several years, local meteorological departments at different levels have nearly three tubers of stemona approximately.Because the development of Radar Technology and the importance of weather application manifest day by day, with the very difficult request for utilization of satisfying the modem weather radar of the digitizing normal pulsed radar of this generally equipment.Simultaneously, the improvement factor that clutter is regularly suppressed is though full coherent system radar can reach 50dB, but cost an arm and a leg, though and intermediate frequency coherent system radar price is cheaper, its improvement factor only can reach 26dB, can not satisfy the measurement requirement of Doppler radar.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of reception coherent system weather radar is provided, its compact conformation is handled the request for utilization of satisfying Doppler radar by receiving, and the measuring accuracy height is easy to use, safe and reliable.
According to technical scheme provided by the invention, described reception coherent system weather radar comprises magnetron transmitter; The input end of described magnetron transmitter links to each other with the output terminal of signal processor; The output terminal of magnetron transmitter links to each other with antenna on the antenna pedestal by transmit-receive switch; The output terminal of magnetron transmitter links to each other with the emission coupling mechanism, the emission coupling mechanism links to each other with the input end of signal processor by second image-reject mixer, and the emission coupling mechanism is coupled the transponder pulse signal of magnetron transmitter output in decay is input to signal processor; The output terminal of transmit-receive switch links to each other with directional coupler, and the received pulse signal that directional coupler receives antenna by first image-reject mixer is down-converted to intermediate-freuqncy signal and inputs to signal processor; First image-reject mixer, second image-reject mixer all link to each other with low noise high stable local oscillator, and described low noise high stable local oscillator links to each other with the output terminal of signal processor; Signal processor is to low noise high stable local oscillator output DAFC signal, in the intermediate-frequency bandwidth scope of putting during the frequency that makes first image-reject mixer, second image-reject mixer be input to the receiving intermediate frequency signal of signal processor and emission medium-frequency signal remains on;
Signal processor is imported trigger pip to magnetron transmitter, makes magnetron transmitter pass through antenna and outwards exports the transponder pulse signal; Signal processor extracts also amplitude, frequency and the prima facies place value of stored transmit pulse signal, and signal processor receives and extract amplitude, frequency and the phase value of received pulse signal; Amplitude, frequency and phase value that signal processor is received pulse signal according to amplitude, frequency and the butt joint of prima facies place value of transponder pulse signal compensate, and make the received pulse signal become the reception coherent signal; Signal processor carries out spectral moment calculating to receiving coherent signal, obtains and export corresponding gas phase parameter.
Described signal processor is the RVP8 signal processor.Described emission coupling mechanism is the aperture coupling mechanism.Described emission coupling mechanism links to each other with second image-reject mixer by attenuator, and described attenuator will be input in the signal processor by second image-reject mixer after will launching the transponder pulse signal attenuation of coupling mechanism coupling.
Described second image-reject mixer links to each other with the input end of signal processor by bandpass filter.Described attenuator links to each other by the input end of power splitter with second image-reject mixer.
Described directional coupler links to each other with first image-reject mixer by limiter and field-effect amplifier, and the output terminal of described first image-reject mixer links to each other with the input end of signal processor by middle amplification module.
Described antenna pedestal is provided with the servo composite module that is used for the rotation of control antenna seat and links to each other, the output terminal of described servo composite module links to each other with signal processor, and servo composite module is input to the antenna angle sign indicating number and the duty of antenna on the antenna pedestal in the signal processor.
The input end of described servo composite module links to each other with monitoring module, and described monitoring module links to each other with signal processor.The power end of described monitoring module links to each other with the distribution power supply, and described distribution power supply is used to provide the working power of monitoring module, servo composite module, magnetron transmitter, antenna, signal processor and low noise high stable local oscillator; The duty of monitoring module control distribution power supply.
Advantage of the present invention: signal processor triggers magnetron transmitter and outwards exports the transponder pulse signal, the transponder pulse signal of magnetron transmitter output is input in the signal processor by emission coupling mechanism coupling part energy, and signal processor extracts also amplitude, frequency and the prima facies place value of stored transmit pulse signal; Antenna receives the echoed signal of meteorological target, directional coupler forms the received pulse signal with coupling unit energy echoed signal, the received pulse signal through behind the limiter, field-effect amplifier by first image-reject mixer and in be input in the signal processor behind the amplification module, signal processor is handled accordingly to receiving pulse signal, obtains amplitude, frequency and the phase value of received pulse signal; In order to realize Doppler's measuring ability, amplitude, frequency and phase value that pulse signal is received in the amplitude of the transponder pulse signal that the signal processor utilization obtains, frequency and the butt joint of prima facies place value compensate, obtain receiving coherent signal, signal processor is to after receiving the coherent signal processing, obtain corresponding meteorologic parameter, finish the process of aerological sounding; With comparing of existing weather radar, can satisfy the request for utilization of Doppler radar, to compare with existing full coherent Doppler radar simultaneously, the cost after the repacking is lower, compact conformation, the measuring accuracy height, easy to use, safe and reliable.
Description of drawings
Fig. 1 is a structured flowchart of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in Figure 1: the present invention includes antenna 1, antenna pedestal 2, transmit-receive switch 3, magnetron transmitter 4, servo combination 5, monitoring module 6, distribution power supply 7, directional coupler 8, limiter 9, field-effect amplifier 10, first image-reject mixer 11, second image-reject mixer 12, middle amplification module 13, signal processor 14, emission coupling mechanism 15, attenuator 16, power splitter 17, bandpass filter 18 and low noise high stable local oscillator 19.
As shown in Figure 1: the input end of described magnetron transmitter 4 links to each other with signal processor 14, and signal processor 14 adopts the RVP8 signal processor; The RVP8 signal processor is the weather radar signal processor of Finland Vaisala Sigmet company.Signal processor 14 makes outwards one group of transponder pulse signal of output of magnetron transmitter 4 to magnetron transmitter 4 input PRF or irregular PRF trigger pips.The output terminal of magnetron transmitter 4 links to each other with transmit-receive switch 3, and described transmit-receive switch 3 links to each other with antenna pedestal 2, and described antenna pedestal 2 is provided with antenna 1, and antenna 1 can be followed antenna pedestal 2 and be rotated; The transponder pulse signal of magnetron transmitter 4 outputs passes through antenna 1 to external radiation; Antenna 1 can also receiving target the weather echo of reflection, described weather echo is the received pulse signal.Antenna pedestal 2 is used to support the transmission of fixing, orientation, pitch rotation and the respective radio-frequency signals of antenna 1; Transmit-receive switch 3 is made up of circulator and discharge tube two parts, is used to isolate transmission channel and receiving cable, prevents that the powerful radiation power that transmitter is come from burning out receiving unit.
Magnetron transmitter 4 is a kind of self-excited oscillation type transmitters, and magnetron transmitter 4 self can produce very high transmit power, directly the magnetron oscillator signal is transmitted in the air by antenna 1; But each transponder pulse phase place of magnetron transmitter 4 is at random, thereby adopts the weather radar of magnetron transmitter 4 to be called non-coherent radar, and they itself do not have Doppler's measuring ability.In order to make weather radar can finish Doppler's detection, need carry out corresponding compensation to the transponder pulse signal of magnetron transmitter 4 with magnetron transmitter 4.The output terminal of magnetron transmitter 4 is provided with emission coupling mechanism 15, and described emission coupling mechanism 15 adopts the aperture coupling mechanism; When magnetron transmitter 4 vibration, during output high-frequency electrical magnetic energy, emission coupling mechanism 15 part energy that can be coupled feeds back in the signal processor 14 by emission coupling branch road as main ripple sample.The output terminal of emission coupling mechanism 15 links to each other with second image-reject mixer 12 by attenuator 16, power splitter 17, and described second image-reject mixer 12 links to each other with the input end of signal processor 14 by bandpass filter 18.Attenuator 16 is used for the energy that 15 couplings of emission coupling mechanism are come is decayed, because the signal power that 15 couplings of emission coupling mechanism are come is higher, therefore need decay to the coupled signal energy, guarantees the safety of system; The debugging that power splitter 17 is used for radar detects, and second image-reject mixer 12 can effectively suppress the interference that image frequency produces; The transponder pulse signal of second image-reject mixer, 12 outputs is avoided the interference of out-of-band-signal to signal processor 14 generations by the outer signal of bandpass filter 18 filtering bands.After signal processor 14 receives the transponder pulse intermediate-freuqncy signal of emission coupling mechanism 15 inputs, behind digital-to-analogue conversion ADC, digital quadrature demodulation and the matched filter of signal processor 14 by the emission path transponder pulse signal is sampled, signal processor 14 uses the emission i/q signal to estimate the amplitude A of transponder pulse signal
k, frequency f
kWith initial phase φ
k, and with the amplitude A of transponder pulse signal
k, frequency f
kWith initial phase φ
kStore, be used for follow-up received pulse signal is carried out corresponding compensation.
Magnetron transmitter 4 is by behind the antenna 1 outside Radiation Emission pulse signal, and the transponder pulse signal can produce echoed signal after running into the weather target, and described echoed signal is received by antenna 1 and transmit-receive switch 3.The output terminal of transmit-receive switch 3 links to each other with directional coupler 8, directional coupler 8 is used for the received pulse signal that transmit-receive switch 3 receives is sampled, directional coupler 8 links to each other with first image-reject mixer 11 by limiter 9 and field-effect amplifier 10, limiter 9 is used to suppress asynchronous strong jamming, the dump energy that restriction magnetron oscillator spare is come by circulator is with protection low noise field effect transistor; Field-effect amplifier 10 is used for the received pulse signal of limiters 10 input, to reduce the overall noise factor of weather radar receiving branch, the sensitivity that improves the weather radar receiving branch.First image-reject mixer 11 links to each other with signal processor 14 by middle amplification module 13, and middle amplification module 13 is used for being input in the signal processor 14 after the amplification, filtering of the received pulse intermediate-freuqncy signal that first image-reject mixer 11 imports.The received pulse signal of amplification module 13 inputs during signal processor 14 receives, and use amplitude, frequency and the phase value that receives i/q signal estimation received pulse signal, signal processor 14 is according to the amplitude A of the transponder pulse signal of storage
k, frequency f
kWith initial phase φ
kCome the amplitude, frequency and the phase value that receive pulse signal are carried out phase compensation, after the phase compensation of 14 pairs of receptions of signal processor pulse signal is finished, make the received pulse signal become the reception coherent signal, finish the coherent process that receives.By the transponder pulse signal characteristic of magnetron transmitter 4 as can be known, receive coherent signal and become random signal; Signal processor 14 need carry out spectral moment calculating to receiving coherent signal in order to obtain required meteorologic parameter by receiving coherent signal, and spectral moment can access corresponding meteorologic parameter dBZ, dBT, V and W after calculating and finishing; Wherein, dBZ is the reflectivity after atural object suppresses, the size of reflectivity reflect water in the meteorological target content what, thereby can infer whether rainy possibility is arranged, dBT is the reflectivity intensity that the radar actual reception arrives, be the emissivity that suppresses without atural object, V is the speed of cloud layer motion, and W is the target spectrum width.
Being calculated as of above-mentioned relevant meteorologic parameter:
Wherein N is a noise power, T
0Be the correlation without clutter filtering, its value size is proportional to the power of (S+C+N), and C is the power of ground clutter, and S represents signal power,
Be the ratio of (signal+clutter) power and noise, or claim the signal noise noise ratio; DBZ
0Be dBZ in 1Km place minimum detectable, it represents the sensitivity of system, its physical significance is to place a target that is full of radar beam in the 1Km position, reduces the intensity size of target then gradually, the intensity size of (echo power=noise power) target when radar can't detect.20logR is that distance is corrected item, and R represents the distance of target, and ar is the atmospheric attenuation factor, and CCOR is the ratio of signal power and (clutter+signal power), and it equals
The movement velocity V of cloud layer has positive and negative branch, and positive speed is the target velocity near this field direction telemechanical, and negative velocity is the target velocity away from this field direction:
Wherein, λ is a radar wavelength, T
sBe the pulse recurrence interval, it is the inverse of pulse repetition rate PRF, arg[R
1] expression gets R
1Argument.
The doppler velocities that target spectrum width W is characterizing different sizes in the effective irradiation body depart from the degree of its mean value, and in fact it is that to have different radial velocities by scattering particle caused.
In the above-mentioned formula, R
0, R
1, R
2Represent 0 rank square of received pulse signal respectively, first moment and second moment, R0 are represented the intensity of signal, comprise the motion velocity information of fortune among the R1, except comprising movable information, also comprise the information of the irregular disturbance of speed (being spectrum width) among the R2; R
0, R
1, R
2Calculate by corresponding random signal spectral moment respectively.
Described antenna pedestal 2 is provided with and is used for the servo composite module 5 that control antenna seat 2 rotates, the input end of described servo composite module 5 links to each other with monitoring module 6, monitoring module 6 is by the rotary state of servo composite module 5 control antenna seats 2, servo composite module 5 detects the antenna angle sign indicating number and the duty of antenna 1 on the antenna pedestal 2, and antenna angle sign indicating number and duty are sent in the signal processor 14.Monitoring module 6 is used for radar host computer each several part major parameter is monitored, when finding fault (or parameter is not in normal range) is arranged, provide the sound and light alarm signal, and failure message shown by light-emitting diode display, simultaneously failure message is passed to the computing machine of digital terminal subsystem, directly carried out menu in Chinese by computing machine and show.In fact, the partial function of monitoring module 6 is exactly BIT (detecting in the machine in real time), and this brings great convenience for the use and the maintenance of complete machine.Monitor subsystem in addition and also accept instruction, finish the open and close control of host power supply and the open and close control of emission high pressure from terminal computer; Accept the high-voltage switch gear signal on the operation panel, the emission high pressure is carried out switch control.Power switch signal on the operation panel is directly controlled driving circuit and relay in the distribution extension set and without the monitoring singlechip system, is finished the switch control of host power supply.Monitoring module 6 links to each other with signal processor 14, also links to each other with distribution power supply 7, and described distribution power supply 7 is used to other modular assemblies that working power is provided, and distribution power supply 7 is 220V, the alternating current of 50Hz.Be connected by the RS232 serial ports between monitoring module 6 and the signal processor 14, monitoring module 6 is issued signal processor 14 with detection signal, signal processor 14 is transmitted to terminal and controls the unit, terminal is controlled the control signal of sending the unit and is passed to monitoring module 6 by signal processor 14, what signal processor 14 played here is the effect of a protocol conversion, i.e. the conversion of serial ports and UDP.In order to guarantee that first image-reject mixer 11 and second image-reject mixer 12 are input to pulse IF-FRE in the signal processor 14 and put in being in 13 the intermediate frequency working range, the output terminal of signal processor 14 links to each other with low noise high stable local oscillator 19, and the output terminal of described low noise high stable local oscillator 19 links to each other with first image-reject mixer 11 and second image-reject mixer 12 respectively; Signal processor 14 is to low noise high stable local oscillator 19 output DAFC (digital automatic frequency control) signals, and low noise high stable local oscillator 19 provides reference frequency signal for radar; The output terminal of low noise high stable local oscillator 19 is controlled first image-reject mixer 11 and second image-reject mixer 12 and is input to received pulse intermediate-freuqncy signal in the signal processor 14 and transponder pulse intermediate-freuqncy signal and puts in 13 intermediate frequency ranges in being in.The DAFC signal effect of signal processor 14 output is that the frequency of control low noise high stable local oscillator 19 makes reception/emission medium-frequency frequency be arranged in all the time to put within 13 the bandwidth of operation, but it is strict 30MHz that DAFC does not guarantee IF-FRE, because signal processor 14 can estimate the frequency detuning of DAFC, thereby in received signal is handled, frequency detuning is compensated, its net result is to offset exomonental frequency jitter, realizes the zero intermediate frequency processing.
As shown in Figure 1: during work, the assembly in 7 pairs of whole weather radars of distribution power supply provides working power; Signal processor 14 is to magnetron transmitter 4 output PRF or irregular PRF signals, thereby can make magnetron transmitter 4 to one group of transponder pulse signal of external radiation, described transponder pulse signal outwards launches to be used for surveying whether meteorological target is arranged in the air by transmit-receive switch 3 and antenna pedestal 2 backs by antenna 1.Simultaneously, one group of transponder pulse signal of magnetron transmitter 4 outputs can be by emission coupling mechanism 15 coupling part energy, emission coupling mechanism 15 is input to the transponder pulse signal that is coupled in the signal processor 14 after attenuator 16, power splitter 17, second image-reject mixer 12 and bandpass filter 18,14 pairs of transponder pulse signals of signal processor I/Q that transmits estimates, extracts and the amplitude A of stored transmit pulse signal
k, frequency f
kWith initial phase φ
k, be convenient to the initial phase φ that signal processor 14 can enough transponder pulse signals that obtains
kThe phase place that receives pulse signal is compensated.After transponder pulse signal that magnetron transmitter 4 radiate by antenna 1 ran into meteorological target, antenna 1 can receive corresponding echoed signal and receive by transmit-receive switch 3, forms the received pulse signal.Described received pulse signal is input in the signal processor 14 behind the amplification module 13 during the received pulse signal that directional coupler 8 is coupled to reaches by limiter 9, field-effect amplifier 10, first image-reject mixer 11 by directional coupler 8 coupling part energy.14 pairs of signal processors receive the I/Q estimation that pulse signal carries out received signal, obtain amplitude, frequency and the phase value of received signal; In order to realize Doppler's measuring ability, signal processor 14 is according to the amplitude A of transponder pulse signal
k, frequency f
kWith initial phase φ
kThe phase value that receives pulse signal is compensated, make the received pulse signal become the reception coherent signal, thereby can obtain required meteorologic parameter by handling to receiving coherent signal.The reception coherent signal is a random signal, signal processor 14 utilizes spectral moment to calculate and handles receiving coherent signal, can access corresponding meteorologic parameter dBZ, dBT, V and W, can infer whether rainy possibility is arranged by the size of dBZ, and, realize Doppler's measuring ability of weather radar according to the size of dBT, V and W.When the transmission frequency emission of magnetron transmitter 4 is drifted about, signal processor 14 output DAFC signals, the output of control low noise high stable local oscillator 19, low noise high stable local oscillator 19 control first image-reject mixer 11 and second image-reject mixers 12 are put during the frequency values that makes first image-reject mixer 11 and second image-reject mixer 12 be input to signal processor 14 is in all the time in 13 the intermediate frequency working range.In addition, to the improvement factor that clutter regularly suppresses, digital received coherent system radar can reach more than the 40dB.Obtaining dBZ, dBT, V, after these four parameters of W, radar is finished these parameter output next and is organized exomonental processing, and this process circulation is repeatedly.If radar need be changed running parameter, the processing meeting of radar is interrupted a little, what pulses signal processor calculates according to new running parameter and can form one group then, and the work that goes round and begins again according to new running parameter, change running parameter up to next time, perhaps till the radar powered-down.
Claims (10)
1. one kind receives coherent system weather radar, comprises magnetron transmitter (4); It is characterized in that: described magnetron transmitter (4) links to each other with the output terminal of signal processor (14), and the output terminal of magnetron transmitter (4) links to each other with antenna (1) on the antenna pedestal (2) by transmit-receive switch (3); The output terminal of magnetron transmitter (4) links to each other with emission coupling mechanism (15), emission coupling mechanism (15) links to each other with the input end of signal processor (14) by second image-reject mixer (12), and emission coupling mechanism (15) is input to the transponder pulse signal coupling of magnetron transmitter (4) output in the signal processor (14); The output terminal of transmit-receive switch (3) links to each other with directional coupler (8), and directional coupler (8) is input to the received pulse signal coupling that antenna (1) receives in the signal processor (14) by first image-reject mixer (11); First image-reject mixer (11), second image-reject mixer (12) all link to each other with low noise high stable local oscillator (19), and described low noise high stable local oscillator (19) links to each other with the output terminal of signal processor (14); Signal processor (14) is to low noise high stable local oscillator (19) output DAFC signal, puts during the frequency that makes first image-reject mixer (11), second image-reject mixer (12) be input to the received pulse signal of signal processor (14) and transponder pulse signal remains in 13 the intermediate frequency range;
Signal processor (14) makes magnetron transmitter (4) outwards export the transponder pulse signal by antenna (1) to magnetron transmitter (4) input trigger pip; Signal processor (14) extracts also amplitude, frequency and the prima facies place value of stored transmit pulse signal, and signal processor (14) receives and extract amplitude, frequency and the phase value of received pulse signal; Amplitude, frequency and phase value that signal processor (14) is received pulse signal according to amplitude, frequency and the butt joint of prima facies place value of transponder pulse signal compensate, and make the received pulse signal become the reception coherent signal; Signal processor (14) carries out spectral moment calculating to receiving coherent signal, obtains and export corresponding gas phase parameter.
2. reception coherent system weather radar according to claim 1 is characterized in that: described signal processor (14) is the RVP8 signal processor.
3. reception coherent system weather radar according to claim 1 is characterized in that: described emission coupling mechanism (15) is the aperture coupling mechanism.
4. reception coherent system weather radar according to claim 1, it is characterized in that: described emission coupling mechanism (15) links to each other with second image-reject mixer (12) by attenuator (16), and described attenuator (16) will be input in the signal processor (14) by second image-reject mixer (12) after will launching the transponder pulse signal attenuation that coupling mechanism (15) is coupled.
5. according to claim 1 or 4 described reception coherent system weather radars, it is characterized in that: described second image-reject mixer (12) links to each other with the input end of signal processor (14) by bandpass filter (18).
6. reception coherent system weather radar according to claim 4 is characterized in that: described attenuator (16) links to each other with the input end of second image-reject mixer (12) by power splitter (17).
7. reception coherent system weather radar according to claim 1, it is characterized in that: described directional coupler (8) links to each other with first image-reject mixer (11) by limiter (9) and field-effect amplifier (10), and the output terminal of described first image-reject mixer (11) links to each other with the input end of signal processor (14) by middle amplification module (13).
8. reception coherent system weather radar according to claim 1, it is characterized in that: described antenna pedestal (3) is provided with the servo composite module (5) that is used for control antenna seat (3) rotation and links to each other, the output terminal of described servo composite module (5) links to each other with signal processor (14), and antenna angle sign indicating number and duty that servo composite module (5) is gone up antenna (1) with antenna pedestal (3) are input in the signal processor (14).
9. reception coherent system weather radar according to claim 8 is characterized in that: the input end of described servo composite module (5) links to each other with monitoring module (6), and described monitoring module (6) links to each other with signal processor (14).
10. reception coherent system weather radar according to claim 9, it is characterized in that: the power end of described monitoring module (6) links to each other with distribution power supply (7), and described distribution power supply (7) is used to provide the working power of monitoring module (6), servo composite module (5), magnetron transmitter (4), transmit-receive switch (3), antenna (1), emission coupling mechanism (15), directional coupler (8), signal processor (14), first image-reject mixer (11), second image-reject mixer (12) and low noise high stable local oscillator (19); The duty of monitoring module (6) control distribution power supply (7).
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| CN104375138A (en) * | 2014-11-18 | 2015-02-25 | 无锡悟莘科技有限公司 | Radar system with double-layer micro-strip paster as main antenna |
| CN105572665A (en) * | 2015-12-11 | 2016-05-11 | 无锡市雷华科技有限公司 | Coast defense searching radar system |
| CN107589423A (en) * | 2017-07-31 | 2018-01-16 | 安徽四创电子股份有限公司 | A kind of pitching electricity sweeps Weather radar system and its method of work |
| CN107390184A (en) * | 2017-08-30 | 2017-11-24 | 北京无线电测量研究所 | A kind of signal correction system and method |
| CN107390184B (en) * | 2017-08-30 | 2019-11-08 | 北京无线电测量研究所 | A kind of signal correction system and method |
| CN108828538A (en) * | 2018-04-26 | 2018-11-16 | 中国科学院地质与地球物理研究所 | Radar transmission power monitoring device |
| CN108828538B (en) * | 2018-04-26 | 2021-02-09 | 中国科学院地质与地球物理研究所 | Radar transmitting power monitoring device |
| CN110501678A (en) * | 2019-09-29 | 2019-11-26 | 北京无线电测量研究所 | A kind of frequency modulated continuous wave radar transceiver |
| CN113132282A (en) * | 2020-01-14 | 2021-07-16 | 中国科学院深圳先进技术研究院 | Signal tracking demodulation device and method |
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