CN106842158A - A kind of phased-array radar transmission channel phase alignment method of testing - Google Patents
A kind of phased-array radar transmission channel phase alignment method of testing Download PDFInfo
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- CN106842158A CN106842158A CN201710204621.5A CN201710204621A CN106842158A CN 106842158 A CN106842158 A CN 106842158A CN 201710204621 A CN201710204621 A CN 201710204621A CN 106842158 A CN106842158 A CN 106842158A
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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
- 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
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Abstract
The present invention relates to a kind of phased-array radar transmission channel phase alignment method of testing, for completing phased-array radar transmission channel between phase difference calibration.Radar front end and test system are arranged in microwave dark room, loudspeaker position is adjusted by elevating mechanism, it is ensured that the tested transmission channel of loudspeaker alignment.The influence that external electromagnetic environment and weather environment can be avoided to test transmission channel phase alignment, test equipment usage amount is small, at utmost ensure the signal quality and stability of reference signal, the root encountered problems in just completing test and quick assignment test with less tester, improves transmission channel phase alignment testing efficiency.
Description
Technical field
The invention belongs to Radar Technology field, and in particular to phased-array radar transmission channel phase alignment is tested, and is applied to
Phase equalization is met between different transmission channels during phased-array radar transmission signal, consequently facilitating each transmission channel transmission signal exists
The waveform of space combination Radar Design requirement.
Background technology
It is to ensure that phased-array radar is controlled in detection range, wave beam with developing rapidly for microelectronics technology and digital technology
Design objective is reached with the aspect such as sidelobe level, at present frequently with transmission digital beam forming technology, it can quickly, neatly
Beam scanning is realized, and with many advantages such as strong antijamming capability, good reliability, but, due to phase between transmission channel
Position characteristic it is inconsistent, the problems such as cause launching beam to point to incorrect and secondary lobe and raise, this is accomplished by by transmission channel phase
Calibrate to compensate the phase difference between different transmission channels in position.By taking X-band radar as an example, it is assumed that have N number of antenna, i.e., N number of transmitting is logical
Road, at present conventional transmission channel phase alignment method of testing schematic diagram see Fig. 1, wherein, radar front end and far field test system pair
The hardware annexation answered is shown in Fig. 2, Fig. 3.
In Fig. 1, in order to reduce the antenna of different transmission channels with respect to the phase that X-band loudspeaker bring by distance difference
Measurement error, is typically arranged in far field by test system, advantage of this is that in the case where X-band loudspeaker are not moved, no
Antenna with transmission channel is approximately the same with respect to the distance of X-band loudspeaker, and the phase difference measured can more accurately reflect
Phase difference between radar difference transmission channel.Assuming that radar has M working frequency points, it is necessary to test N number of transmitting under M frequency successively
The phase difference of interchannel, typically obtains N number of transmitting by contrasting N number of transmission channel transmission signal with the phase difference of reference signal
The phase difference of interchannel, and then obtain the phase value that N number of transmission channel needs to compensate.Conventional hair is introduced by taking frequency 1 as an example below
The implementation process of channel phases calibration test method is penetrated, other frequency implementation process are the same.
In radar front end, as shown in Fig. 2 signal processor control frequency synthesizer produces reference signal SJIt is (generally several
The intermediate-freuqncy signal of ten MHz), as the reference signal of test transmission channel phase difference, it is necessary to pass through signal source 1 reference signal SJ
Frequency multiplication is to radio frequency SJF, in order to avoid being interfered with each other with radar X-band transmission signal, can be by reference signal SJFIt is set in C ripples
Section, and gone out by C-band horn launch；By C-band horn launch reference signal SJFWhile, signal processor control
Frequency synthesizer produces RF signal SF, and by being input into N number of T/R components, RF signal S after 1 point of N power splitters work(pointFIn T/R
Component internal is carried out power amplification and is launched by X-wave band autenna under signal processor control, in order to test N number of transmitting
Channel radio frequency signal SFRelative to reference signal SJFPhase difference, signal processor controls N number of transmission channel to develop successively to penetrate, first
First allow the 1st transmission channel exploitation to be penetrated, can so ensure in the 1st transmission channel transmission signal relative datum signal of test
During phase difference, will not be influenceed by other transmission channel transmission signals.
In far field test system, as shown in figure 3, X-band loudspeaker and C-band loudspeaker receive X-band RF signal S respectivelyF
With C-band reference signal SJF, by RF signal SFWith reference signal SJFFrequency difference and oscillograph performance limitations affect, it is impossible to
X-band or the direct test phase difference of C-band are, it is necessary to RF signal SFWith reference signal SJFBeing down-converted to same intermediate frequency is carried out
Phase difference is tested.RF signal SFInput spectrum instrument, frequency spectrograph output intermediate-freuqncy signal S0FTo oscillograph；Meanwhile, reference signal SJF
Divided frock output reference signal SJTo signal source 2, the output of signal source 2 and signal S0FThe intermediate-freuqncy signal S of same frequency0JTo oscillography
Device, signal S is measured by oscillograph0FRelative to signal S0JPhase differenceThat is the transmission signal of transmission channel 1 is relative to benchmark
The phase difference of signal.
The transmission signal of repeat its transmission passage 1 test process poor relative to reference signal phase, signal processor control hair
Penetrate 2~transmission channel of passage N and develop successively and penetrate, the phase of N number of transmission channel transmission signal relative datum signal during frequency 1 can be obtained
Difference is：
Then 2~passage of passage N is relative to the phase difference of passage 1 during frequency 1：
Then N number of transmission channel needed in frequency 1 compensation phase value be：
Measuring N number of transmission channel successively using the above method needs the phase value of compensation in frequency 2~frequency MObtaining N number of transmission channel under M frequency needs the phase value of compensation：
For above-mentioned conventional transmission channel phase alignment method of testing, periphery electromagnetic environment shadow is easily received in actual test
Ring, and this influence becoming apparent in urban district performance, additionally, reference signal SJLaunched by the up-conversion of signal source 1, C-band
Loudspeaker, C-band receive loudspeaker and frequency dividing frock down coversion returns SJ, whole transmission channel is to reference signal SJSignal quality
Certain influence is brought, test accuracy is influenceed.
The content of the invention
The technical problem to be solved
Normal radar needed when transmission channel phase alignment is tested radar and test equipment Distant Deployment, test
Shi Rongyi receives periphery electromagnetic environment radiation interference, because radar and test equipment are in outdoor separate deployment, transmission channel phase school
Quasi- test is not easy to quick analysis and orientation problem root when encountering problems, influence testing efficiency, when meteorological condition is not allowed,
Must interrupt test, influence testing progress.
In order to avoid the testing efficiency of existing transmission channel phase alignment method of testing is low and measuring accuracy is low, the present invention is carried
Go out a kind of phased-array radar transmission channel phase alignment method of testing.The method does not receive external electromagnetic ambient influnence, is ensureing base
While the signal quality and stability of calibration signal, testing efficiency is improve, make whole radar system high precision.
Technical scheme
A kind of phased-array radar transmission channel phase alignment method of testing, microwave is arranged in by radar front end and test system
Darkroom, wave band loudspeaker to be measured are arranged on elevating mechanism, and loudspeaker position is adjusted by elevating mechanism, it is ensured that loudspeaker alignment is tested
Examination transmission channel；It is characterized in that step is as follows：
Step 1：Wave band loudspeaker to be measured are directed at radar front end wave band antenna 1 to be measured by control elevating mechanism；
Step 2：Signal processor control frequency synthesizer produces reference signal SJAnd RF signal SF, reference signal SJIt is defeated
Enter signal source, signal source output intermediate-freuqncy signal S0JTo oscillograph；RF signal SFInput power splitter, through the power amplification of T/R components 1
Afterwards, launched by wave band antenna to be measured 1；
Step 3：Wave band loudspeaker to be measured receive RF signal SF, and input spectrum instrument, frequency spectrograph output and intermediate-freuqncy signal S0J
The intermediate-freuqncy signal S of same frequency0FTo oscillograph；
Step 4：Signal S is measured by oscillograph0FRelative to signal S0JPhase difference, i.e., transmission channel 1 transmitting letter
Number relative to reference signal phase difference；
Step 5：Wave band loudspeaker position to be measured is adjusted by elevating mechanism, and allows correspondence transmission channel exploitation to penetrate, repeat to walk
Rapid 1~step 4, measures the phase difference of N number of transmission channel transmission signal relative datum signal during frequency 1 successively：
Then 2~passage of passage N is relative to the phase difference of passage 1 during frequency 1：
Then N number of transmission channel needed in frequency 1 compensation phase value be：
Step 6：Switching radar working frequency points, 1~step 5 of repeat step, measure successively N number of transmission channel frequency 2~
The phase value of compensation is needed during frequency M
Step 7：Obtaining N number of transmission channel under M frequency needs the phase value of compensation to be：
Described wave band to be measured is X-band or S-band.
Beneficial effect
A kind of phased-array radar transmission channel phase alignment method of testing proposed by the present invention, enters under microwave dark room environment
Row transmission channel phase alignment is tested, and radar front end and test equipment be arranged together, it is to avoid external electromagnetic radiation and meteorological
The influence that environment is tested transmission channel phase alignment, can when test encounters problems quick positioning question root, greatly carry
Testing efficiency high, meanwhile, because without reference signal SJBy signal source 1, C-band launch loudspeaker, C-band receive loudspeaker and
Frequency dividing frock, it is ensured that reference signal SJSignal quality, reduce equipment usage amount, method simple possible.Test equipment makes
Consumption is small, at utmost ensures the signal quality and stability of reference signal, and it is simultaneously fast just to complete test with less tester
The root encountered problems in fast assignment test, improves transmission channel phase alignment testing efficiency.
Compared with prior art, have an advantageous effect in that：
1) test of transmission channel phase alignment is carried out in microwave dark room in the present invention, it is to avoid external electromagnetic environment and meteorological ring
Border influences；
2) radar front end and test equipment are arranged together in the present invention, when transmission channel phase alignment encounters problems,
While tester is reduced, can be greatly improved by checking radar front end and test equipment quick positioning question root
Efficiency；
3) reference signal S in the present inventionJLoudspeaker, C-band need not be launched by signal source 1, C-band and receive loudspeaker and frequency dividing
Frock, on the premise of test equipment usage amount is reduced, can avoid above-mentioned transmission channel to reference signal SJSignal quality
The influence for bringing.
Brief description of the drawings
Fig. 1 often uses transmission channel phase alignment method of testing schematic diagram
Fig. 2 radar front end hardware connection diagrams
Fig. 3 far field test system hardware connection diagrams
Fig. 4 microwave dark room transmission channel phase alignment method of testing schematic diagrams
Narrow beams transmission directional diagram after the test of Fig. 5 microwave dark room transmission channels phase alignment
Wide-beam transmission is to figure after the test of Fig. 6 microwave dark room transmission channels phase alignment
Specific embodiment
The transmission channel phase alignment method of testing that the present invention is used is shown in Fig. 4, and radar front end and test system are arranged in
Microwave dark room, X-band loudspeaker are fixed on elevating mechanism, are saved equipment and are connect including signal source 1, C-band transmitting loudspeaker, C-band
Loudspeaker and frequency dividing frock are received, during actual test, radar is operated in frequency 1 first, and signal processor controls N number of transmission channel successively
Exploitation is penetrated, and is first turned on the 1st transmission channel, and transmission channel phase alignment testing procedure is as follows：
1) elevating mechanism is controlled, X-band loudspeaker is raised to position 1, X-band loudspeaker alignment radar front end X-wave band autenna 1；
2) signal processor control frequency synthesizer produces reference signal SJAnd RF signal SF, reference signal SJInput letter
Number source, signal source output intermediate-freuqncy signal S0JTo oscillograph；RF signal SFInput power splitter, through the power amplification of T/R components 1 after,
Launched by X-wave band autenna 1；
3) X-band loudspeaker receive RF signal SF, and input spectrum instrument, frequency spectrograph output and intermediate-freuqncy signal S0JSame frequency
Intermediate-freuqncy signal S0FTo oscillograph；
4) signal S is measured by oscillograph0FRelative to signal S0JPhase differenceThat is the transmission signal phase of transmission channel 1
For the phase difference of reference signal；
5) X-band loudspeaker position is adjusted by elevating mechanism, and allows correspondence transmission channel exploitation to penetrate, repeat step 1)~step
It is rapid 4), the phase difference of N number of transmission channel transmission signal relative datum signal during frequency 1 is measured successively：
Then 2~passage of passage N is relative to the phase difference of passage 1 during frequency 1：
Then N number of transmission channel needed in frequency 1 compensation phase value be：
6) radar working frequency points, repeat step 1 are switched)~step 5), N number of transmission channel is measured successively in frequency 2~frequency
The phase value of compensation is needed during point M
7) obtaining N number of transmission channel under M frequency needs the phase value of compensation to be：
Embodiment 1 is the phased-array radar for being operated in S-band：
The target radar is operated in S-band, there is 32 transmission channels, 16 working frequency points.Transmission channel phase school
Quasi- method of testing is shown in Fig. 4, it is necessary to change the X-wave band autenna in Fig. 4 into S-band antenna, and X-band loudspeaker change S-band loudspeaker into.Thunder
Microwave dark room is arranged in up to front end and test system, S-band loudspeaker are fixed on elevating mechanism, during actual test, radar is first
Frequency 1 is first operated in, signal processor 32 transmission channels of control are developed penetrate successively, are first turned on the 1st transmission channel, launch
Channel phases calibration test step is as follows：
1) elevating mechanism is controlled, S-band loudspeaker is raised to position 1, S-band loudspeaker alignment radar front end S-band antenna 1；
2) signal processor control frequency synthesizer produces reference signal SJ and RF signal S F, reference signal SJ input letters
Number source, signal source exports intermediate-freuqncy signal S0J to oscillograph；RF signal S F be input into power splitter, through the power amplification of T/R components 1 after,
Launched by S-band antenna 1；
3) S-band loudspeaker receive RF signal S F, and input spectrum instrument, frequency spectrograph output and intermediate-freuqncy signal S0J same frequencys
Intermediate-freuqncy signal S0F to oscillograph；
4) phase differences of the signal S0F relative to signal S0J is measured by oscillographThat is the transmission signal phase of transmission channel 1
For the phase difference of reference signal；
5) S-band loudspeaker position is adjusted by elevating mechanism, and allows correspondence transmission channel exploitation to penetrate, repeat step 1)~step
It is rapid 4), phase difference of 32 transmission channel transmission signals relative to reference signal when can obtain frequency 1：
Then 2~passage of passage N is relative to the phase difference of passage 1 during frequency 1：
Then 32 transmission channels need the phase value of compensation to be in frequency 1：
6) radar working frequency points, repeat step 1 are switched)~step 5), 32 transmission channels are measured successively in frequency 2~frequency
The phase value of compensation is needed during point 16
7) obtaining lower 32 transmission channels of 16 frequencies needs the phase value of compensation to be：
Radar is finished after transmission channel phase alignment is tested, it is necessary to verify whether phase alignment reaches by transmitting pattern
Mark, Fig. 5 and Fig. 6 provides narrow beams transmission directional diagram and wide-beam transmission of the radar in frequency 1 to figure respectively, and analysis can
Know, narrow beam and wide-beam transmission meet Radar Design requirement to figure.
Invention describes a kind of method that transmission channel phase alignment test is carried out under microwave dark room environment, the method
Not by external electromagnetic environment and meteorological ambient influnence, at utmost ensure the signal quality and stability of reference signal, improve hair
Channel phases calibration test efficiency is penetrated, makes whole radar system high precision, with engineering application value higher.
Claims (2)
1. a kind of phased-array radar transmission channel phase alignment method of testing, is arranged in microwave dark by radar front end and test system
Room, wave band loudspeaker to be measured are arranged on elevating mechanism, and loudspeaker position is adjusted by elevating mechanism, it is ensured that loudspeaker alignment is tested
Transmission channel；It is characterized in that step is as follows：
Step 1：Wave band loudspeaker to be measured are directed at radar front end wave band antenna 1 to be measured by control elevating mechanism；
Step 2：Signal processor control frequency synthesizer produces reference signal SJAnd RF signal SF, reference signal SJInput letter
Number source, signal source output intermediate-freuqncy signal S0JTo oscillograph；RF signal SFInput power splitter, through the power amplification of T/R components 1 after,
Launched by wave band antenna to be measured 1；
Step 3：Wave band loudspeaker to be measured receive RF signal SF, and input spectrum instrument, frequency spectrograph output and intermediate-freuqncy signal S0JWith frequency
The intermediate-freuqncy signal S of rate0FTo oscillograph；
Step 4：Signal S is measured by oscillograph0FRelative to signal S0JPhase difference φ1, i.e. the transmission signal phase of transmission channel 1
For the phase difference of reference signal；
Step 5：Wave band loudspeaker position to be measured is adjusted by elevating mechanism, and allows correspondence transmission channel exploitation to penetrate, repeat step 1~
Step 4, measures the phase difference of N number of transmission channel transmission signal relative datum signal during frequency 1 successively：
Then 2~passage of passage N is relative to the phase difference of passage 1 during frequency 1：
Then N number of transmission channel needed in frequency 1 compensation phase value be：
Step 6：Switching radar working frequency points, 1~step 5 of repeat step measures N number of transmission channel in 2~frequency of frequency M successively
When need compensation phase value
Step 7：Obtaining N number of transmission channel under M frequency needs the phase value of compensation to be：
2. a kind of phased-array radar transmission channel phase alignment method of testing according to claim 1, it is characterised in that institute
The wave band to be measured stated is X-band or S-band.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092013A (en) * | 2017-06-22 | 2017-08-25 | 雷象科技（北京）有限公司 | Phased array weather radar is received, transmission channel detection method and device |
| CN107390192A (en) * | 2017-09-20 | 2017-11-24 | 雷象科技（北京）有限公司 | Phased array weather radar fast amplitude, phase equalization measuring method |
| CN107991658A (en) * | 2017-11-24 | 2018-05-04 | 上海机电工程研究所 | Millimeter wave array antenna radial distance calibration method |
| CN109752705A (en) * | 2017-11-03 | 2019-05-14 | 中电科海洋信息技术研究院有限公司 | High-frequency water acoustic array performance parameter measurement method and system, equipment and storage medium |
| CN110988827A (en) * | 2019-12-18 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | TDC synchronous calibration all-digital array radar front end based on wireless network transmission |
| CN111693952A (en) * | 2020-07-21 | 2020-09-22 | 无锡国芯微电子系统有限公司 | Phased array amplitude and phase calibration system |
| CN112367126A (en) * | 2020-09-28 | 2021-02-12 | 北京遥测技术研究所 | Satellite-borne digital multi-beam communication load ground calibration method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092013A (en) * | 2017-06-22 | 2017-08-25 | 雷象科技（北京）有限公司 | Phased array weather radar is received, transmission channel detection method and device |
| CN107092013B (en) * | 2017-06-22 | 2023-11-21 | 浙江宜通华盛科技有限公司 | Phased array weather radar receiving and transmitting channel detection method and device |
| CN107390192A (en) * | 2017-09-20 | 2017-11-24 | 雷象科技（北京）有限公司 | Phased array weather radar fast amplitude, phase equalization measuring method |
| CN107390192B (en) * | 2017-09-20 | 2020-04-10 | 雷象科技（北京）有限公司 | Quick amplitude and phase consistency measuring method for phased array weather radar |
| CN109752705A (en) * | 2017-11-03 | 2019-05-14 | 中电科海洋信息技术研究院有限公司 | High-frequency water acoustic array performance parameter measurement method and system, equipment and storage medium |
| CN107991658A (en) * | 2017-11-24 | 2018-05-04 | 上海机电工程研究所 | Millimeter wave array antenna radial distance calibration method |
| CN107991658B (en) * | 2017-11-24 | 2020-04-24 | 上海机电工程研究所 | Radial distance calibration method for millimeter wave array antenna |
| CN110988827A (en) * | 2019-12-18 | 2020-04-10 | 中国电子科技集团公司第二十研究所 | TDC synchronous calibration all-digital array radar front end based on wireless network transmission |
| CN110988827B (en) * | 2019-12-18 | 2022-06-21 | 中国电子科技集团公司第二十研究所 | TDC synchronous calibration all-digital array radar front end based on wireless network transmission |
| CN111693952A (en) * | 2020-07-21 | 2020-09-22 | 无锡国芯微电子系统有限公司 | Phased array amplitude and phase calibration system |
| CN112367126A (en) * | 2020-09-28 | 2021-02-12 | 北京遥测技术研究所 | Satellite-borne digital multi-beam communication load ground calibration method |
| CN112367126B (en) * | 2020-09-28 | 2022-10-28 | 北京遥测技术研究所 | Satellite-borne digital multi-beam communication load ground calibration method |
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