CN110308431A - A kind of solid-state radar calibration system - Google Patents
A kind of solid-state radar calibration system Download PDFInfo
- Publication number
- CN110308431A CN110308431A CN201910753234.6A CN201910753234A CN110308431A CN 110308431 A CN110308431 A CN 110308431A CN 201910753234 A CN201910753234 A CN 201910753234A CN 110308431 A CN110308431 A CN 110308431A
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- switch
- coupler
- calibration system
- radio frequency
- solid
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- 239000010409 thin film Substances 0.000 claims description 7
- 239000010408 film Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 101000658638 Arabidopsis thaliana Protein TRANSPARENT TESTA 1 Proteins 0.000 description 2
- 101100262183 Arabidopsis thaliana TTL2 gene Proteins 0.000 description 2
- 101100262192 Arabidopsis thaliana TTL3 gene Proteins 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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- 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
- G01S7/40—Means for monitoring or calibrating
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
-
- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
- G01S7/4013—Means for monitoring or calibrating of parts of a radar system of transmitters involving adjustment of the transmitted power
Abstract
The invention discloses a kind of solid-state radar calibration systems, including antenna, receive-transmit system and calibration system.The receive-transmit system includes the transmitter being sequentially connected, the first coupler, circulator, the second coupler, receiver and frequency source；The antenna is connected with circulator.The calibration system includes switch, noise source, numerical control attenuation unit and delay line；The noise source is connected with switch first input end；The frequency source is connected by numerical control attenuation unit with second input terminal of switch；Second coupler output is connected by delay line with the three-position switch third input terminal；The output switching terminal is connected with second coupler.The present invention can enhance system mark compared with flexibility；Mark is improved compared with accuracy；Enhance system stability and interference free performance；Reduce system debug difficulty and installation difficulty；Monitor the working condition and work in every index of radar transmit-receive system in real time.
Description
Technical field
The present invention relates to Radar Technology field more particularly to a kind of solid-state radar calibration systems.
Background technique
Extreme weather takes place frequently in recent years, and natural calamity is than more serious, and wherein meteorological disaster tops the list, and disaster area is also gradually
Expand, more and more industry developments are restricted by meteorological disaster.In order to ensure meteorological detection and forecast, various radar is needed 24 hours
The continual existing radar system of normal work has the disadvantage in that
(1) system flexibility is poor；
(2) accuracy is poor；
(3) stability and interference free performance are poor；
(4) system debug difficulty and installation difficulty are larger；
(5) working condition to radar transmit-receive system and work in every index lack monitoring function.
Summary of the invention
The object of the invention is that providing a kind of solid-state radar calibration system to solve the above-mentioned problems, including day
Line, receive-transmit system and calibration system.
The receive-transmit system includes the transmitter being sequentially connected, the first coupler, circulator, the second coupler, receiver
With frequency source；The antenna is connected with circulator.
The calibration system includes switch, noise source, numerical control attenuation unit and delay line；The noise source and switch first
Input terminal is connected；The frequency source is connected by numerical control attenuation unit with second input terminal of switch；Second coupler
Output end is connected by delay line with the three-position switch third input terminal；The output switching terminal and the second coupler phase
Even.
The beneficial effects of the present invention are: the present invention can enhance system mark compared with flexibility；Mark is improved compared with accuracy；Increase
Strong system stability and interference free performance；Reduce system debug difficulty and installation difficulty；Monitor the work of radar transmit-receive system in real time
Make state and work in every index.
Detailed description of the invention
Fig. 1 is system diagram of the invention；
Fig. 2 is the structural schematic diagram of delay line；
Fig. 3 is the structural schematic diagram of three-position switch.
In figure: 1- inputs thin film transducer；2- inputs thin film transducer；3- sound bearing medium.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Fig. 1, a kind of solid-state radar calibration system of the present invention, including antenna, receive-transmit system and calibration system.
The receive-transmit system includes the transmitter being sequentially connected, the first coupler, circulator, the second coupler, receiver
With frequency source；The antenna is connected with circulator.
The calibration system includes switch, noise source, numerical control attenuation unit and delay line；The noise source and switch first
Input terminal is connected；The frequency source is connected by numerical control attenuation unit with second input terminal of switch；Second coupler
Output end is connected by delay line with the three-position switch third input terminal；The output switching terminal and the second coupler phase
Even.
Further, the switch is TTL three-position switch；The TTL three-position switch includes the first radio frequency input channel, the
Two radio frequency input channels, third radio frequency input channel, output switching terminal, the first control line, the second control line and third control line；
First control line, the second control line and third control line are logical for the first radio frequency input channel, the input of the second radio frequency
The on-off control in road, third radio frequency input channel.
Further, the numerical control attenuation unit includes the numerical-control attenuator that three-level is sequentially connected.
Further, the delay line includes the input matching network for being sequentially connected setting, input thin film transducer 1, passes
Acoustic medium 3, input thin film transducer 2, output matching network.
Delay line uses acoustic bulk wave (BAW) microwave delay line, and loss is low, small in size, attenuation stability is good.Transmitter output
Inverse piezoelectric effect of the signal after coupler couples after input matching network enters thin film transducer through transducer membrane, will
Electric signal is changed into acoustical signal and propagates in sound bearing medium 3, when acoustical signal reaches input thin film transducer 2, then by transducing
Acoustical signal is changed into electric signal by the piezoelectric effect of film, is exported through output matching network.Due to the spread speed ratio of acoustical signal
Electric signal wants slow 10^4 magnitude, therefore longer delay can be obtained in shorter acoustic propagation length, and be delayed 5us, Insertion Loss
50dB。
The present invention uses three-position switch for TTL control type, and working frequency can be from DC to 18GHz, and insertion loss is small, interchannel
Isolation is big, is easy to debug.First control line TTL1, the second control line TTL2 and tri- road TTL control line of third control line TTL3
The control tri- tunnel radio-frequency channel RF1, RF2, RF3 is conducted to output switching terminal C respectively, when three-position switch works, delay line output letter
Number, numerical-control attenuator output radiofrequency signal, noise source output noise signal penetrated by the first radio frequency input channel RF1, second respectively
Frequency input channel RF2, third radio frequency input channel RF3 input, are led to accordingly by tri- control line options of TTL1, TTL2, TTL3
Road is conducted to output switching terminal.
Since the power bracket of weather echo is larger, so Weather Radar Receiver works normally received signal power
Range is larger, in order in the power range of receiving of entire receiver can accurate probe gas as the reflectivity of target, this will
Asking reception input, output power in certain power range of receiving is a fixed linear relationship, the i.e. dynamic range of receiver.
The present invention uses maximum attenuation amount for 31dB, the step attenuator of stepping 1dB.Connected using three numerical control attenuator stages, complete attenuation
Amount has reached 93dB.
In order to demarcate the receiver of Larger Dynamic range, it is necessary to the stepping numerical-control attenuator of big attenuation.
The present invention is used to mark compared with monitoring the working condition of receive-transmit system and test transmitting-receiving solid-state radar receive-transmit system
System operational parameters.When demarcating transmitter, the emitted channel coupler coupling part energy of transmitter output signal, which enters, prolongs
Slow line, then enter receiving channel coupler after being gated by three-position switch and tested into receiver；When demarcating receiver, make an uproar
Sound source output noise signal gates to receiving channel coupler through three-position switch and enters receiver or frequency source output test
Signal gates to receiving channel coupler through three-position switch and carries out calibration test into receiver.
It includes receiver gain, receiver noise factor, receiver dynamic range and reflectivity mark that receiver, which demarcates content,
It is fixed.
When receiver noise factor is demarcated, three-position switch is gated to noise source, opens noise source and shutdown noise source respectively,
The second coupler for allowing cold noise and thermal noise to pass through receiving channel respectively enters receiver and is tested, and passes through noise source
Excess noise ratio calculates the noise coefficient of receiver.
When receiver gain is demarcated, three-position switch is gated to numerical-control attenuator, by frequency source output known power radio frequency letter
Number receiver is entered by the second coupler of receiving channel after numerical-control attenuator, three-position switch, is monitored by receiver
The known power of signal of RF test signal power same frequency source output do comparison and can calibrate receiver gain and be
System reflectivity；Adjusting numerical-control attenuator, adjustable signal power can calibrate reception on a large scale to provide receiver coupling input
Linear working range, that is, dynamic range of machine.
Transmitter calibration content includes that transmission power calibration is demarcated with ground bounce removal ability.
When transmission power is demarcated, three-position switch is gated to delay line passage, and transmitter output signal is after coupler, mainly
Signal energy is launched after entering circulator by antenna, and circulator has portion of energy to leak to receiving channel, transmitting coupling
Device enters receiver by the delay line of small part energy coupling to calibration system, and through three-position switch, receiving channel coupler.By
In transmission channel coupler, receiving channel coupler and delay line be fixed value to the Insertion Loss of signal, so receiver can be with
Go out the output power of transmitter by the delay line signal power inverse of detection calibration system output, transmitter output is completed with this
Power calibration.
When ground bounce removal ability is demarcated, the power loss and time delay that radio-frequency delay line transmits signal are fixation
Value, it is possible thereby to the background return signal using the simulated behavior from a certain fixed range of radar, by this signal and transmitting signal
It is calculated, the ground bounce removal ability of radar system can be calibrated.
The present invention can enhance system mark compared with flexibility；Mark is improved compared with accuracy；Enhance system stability with it is anti-interference
Performance；Reduce system debug difficulty and installation difficulty；Monitor the working condition and work in every index of radar transmit-receive system in real time.
The limitation that technical solution of the present invention is not limited to the above specific embodiments, it is all to do according to the technique and scheme of the present invention
Technology deformation out, falls within the scope of protection of the present invention.
Claims (4)
1. a kind of solid-state radar calibration system, which is characterized in that including antenna, receive-transmit system and calibration system；
The receive-transmit system includes the transmitter being sequentially connected, the first coupler, circulator, the second coupler, receiver and frequency
Rate source；The antenna is connected with circulator；
The calibration system includes switch, noise source, numerical control attenuation unit and delay line；The noise source and switch first input
End is connected；The frequency source is connected by numerical control attenuation unit with second input terminal of switch；The second coupler output
End is connected by delay line with the three-position switch third input terminal；The output switching terminal is connected with second coupler.
2. a kind of solid-state radar calibration system according to claim 1, which is characterized in that the switch is TTL three-position switch；
The TTL three-position switch is defeated including the first radio frequency input channel, the second radio frequency input channel, third radio frequency input channel, switch
Outlet, the first control line, the second control line and third control line；First control line, the second control line and third control line
On-off for the first radio frequency input channel, the second radio frequency input channel, third radio frequency input channel controls.
3. a kind of solid-state radar calibration system according to claim 1, which is characterized in that the numerical control attenuation unit includes three
The numerical-control attenuator that grade is sequentially connected.
4. a kind of solid-state radar calibration system according to claim 1, which is characterized in that the delay line includes being sequentially connected
Input matching network, the input thin film transducer, sound bearing medium, output film energy converter, output matching network of setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753234.6A CN110308431A (en) | 2019-08-15 | 2019-08-15 | A kind of solid-state radar calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753234.6A CN110308431A (en) | 2019-08-15 | 2019-08-15 | A kind of solid-state radar calibration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110308431A true CN110308431A (en) | 2019-10-08 |
Family
ID=68083530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910753234.6A Pending CN110308431A (en) | 2019-08-15 | 2019-08-15 | A kind of solid-state radar calibration system |
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| CN (1) | CN110308431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115356700A (en) * | 2022-10-19 | 2022-11-18 | 南京冉思电子科技有限公司 | Radar active calibrator |
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|---|---|---|---|---|
| CN104714217A (en) * | 2015-03-16 | 2015-06-17 | 西安电子工程研究所 | Zero distance calibration system and method for pulse Doppler radar |
| CN106093893A (en) * | 2016-06-01 | 2016-11-09 | 西安电子工程研究所 | A kind of online calibration method of any polarized wave of dual polarization radar |
| CN109946662A (en) * | 2019-05-06 | 2019-06-28 | 成都远望科技有限责任公司 | Calibration System in a kind of phased array weather radar machine |
| CN209486290U (en) * | 2019-08-15 | 2019-10-11 | 成都远望探测技术有限公司 | A kind of solid-state radar calibration system |
-
2019
- 2019-08-15 CN CN201910753234.6A patent/CN110308431A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714217A (en) * | 2015-03-16 | 2015-06-17 | 西安电子工程研究所 | Zero distance calibration system and method for pulse Doppler radar |
| CN106093893A (en) * | 2016-06-01 | 2016-11-09 | 西安电子工程研究所 | A kind of online calibration method of any polarized wave of dual polarization radar |
| CN109946662A (en) * | 2019-05-06 | 2019-06-28 | 成都远望科技有限责任公司 | Calibration System in a kind of phased array weather radar machine |
| CN209486290U (en) * | 2019-08-15 | 2019-10-11 | 成都远望探测技术有限公司 | A kind of solid-state radar calibration system |
Non-Patent Citations (1)
| Title |
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| 黄玉学;蔡江涛;左湘文;: "CINRAD/CA型新一代天气雷达检测标校技术", 电子测量技术, no. 21 * |
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| CN115356700A (en) * | 2022-10-19 | 2022-11-18 | 南京冉思电子科技有限公司 | Radar active calibrator |
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