CN107340434A - Satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data - Google Patents
Satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data Download PDFInfo
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- CN107340434A CN107340434A CN201710344355.6A CN201710344355A CN107340434A CN 107340434 A CN107340434 A CN 107340434A CN 201710344355 A CN201710344355 A CN 201710344355A CN 107340434 A CN107340434 A CN 107340434A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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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
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Abstract
The invention discloses a kind of satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data, it comprises the following steps：Step 1, amplitude phase error data and exemplary position antenna subarray patterns that satellite-borne synthetic aperture radar antenna calibration network respectively calibrates passage are obtained during the unit product test of ground respectively；Step 2, the radar running parameter such as suitable bandwidth, pulsewidth is selected, in the case where radar system list T/R tests calibration work pattern, obtain one by one and record transmitting/reception pulse scale signal of each T/R passages of antenna array etc..The present invention realizes the validation test to phased array antenna directional diagram performance (nearly intermediate frequency or with interior average) on the premise of without antenna damnification system, solve the problems, such as that conventional radar satellite phased array antenna tests each stage directional diagram performance without effective examination checking means in whole star, the testing efficiency of whole star stage radar load is substantially increased, shortens the lead time of whole star.
Description
Technical field
The present invention relates to a kind of whole star radar load testing method of radar satellite, and internal calibration number is based on more particularly to one kind
According to satellite-borne synthetic aperture radar antenna direction picture capturing method.
Background technology
Synthetic aperture radar is a kind of active remote sensing device for being operated in microwave section.It not by sunshine and weather condition etc. because
Element influences, can round-the-clock, round-the-clock earth observation imaging, thus in disaster monitoring, environment and marine monitoring, resources survey, agriculture
Agricultural output assessment, mapping and military affairs etc. have unique application advantage, have the function that other remote sensors are irreplaceable.
Flat surface active phased array antenna due to possess emission peak power is high, antenna gain is big, antenna beam can figuration, and
The features such as being scanned with wide-angle can be switched fast, is widely used in spaceborne synthetic aperture radar (SAR) system.But phased array antenna
Active unit is large number of, and system composition is extremely complex, mainly passes through antenna damnification system in the phased array antenna development stage
System is measured to its directional diagram performance, and the state of its front product is confirmed.In general broadband satellite-borne synthetic aperture thunder
Up to system, there is the features such as signal bandwidth is wide, and Working wave position is more.By test waves bit quantity, test frequency quantity and near field
The factors such as measuring system power of test influence, and the general phased array antenna Pattern measurement cycle is all long.
After phased array antenna delivers whole star, its can be undergone with whole star the test of radar subsystem dress star, whole star mechanical test,
Thermal balance and thermal vacuum test, EMC experiments, remanent magnetism experiment and Ground Application and the experiment of fortune control system docking, whole star mould fly to test
With it is seasoned experiment etc. whole star large test and experimental stage.Due to by test site, condition, and whole lead time in star stage
Limited etc. factor, can not be in the test of whole star and various test stages, using antenna damnification system, to undergoing, whole star is every to be tested
Carry out testing comparison and confirmation with the phased array antenna performance of experiment.Can only be by the limited telemetry parameter of antenna array to front
Product Status carries out area monitoring.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of satellite-borne synthetic aperture radar day based on internal calibration data
Line direction picture capturing method, it can solve the problem that conventional synthesis aperture radar satellite phased array antenna tests each stage direction in whole star
The problem of figure performance is without effective checking means.
The present invention is that solve above-mentioned technical problem by following technical proposals：It is a kind of based on the spaceborne of internal calibration data
Synthetic aperture radar antenna direction picture capturing method, it is characterised in that the satellite-borne synthetic aperture thunder based on internal calibration data
Comprise the following steps up to antenna direction picture capturing method：
Step 1, obtaining satellite-borne synthetic aperture radar antenna calibration network during the unit product test of ground respectively, respectively calibration is logical
The amplitude phase error data E in roadScalorNetAnd exemplary position antenna subarray patterns F (f)mn(u,v)；
Step 2, the radar running parameter such as suitable bandwidth, pulsewidth is selected, calibration work is tested in radar system list T/R
Under pattern, obtain one by one and record transmitting/reception pulse scale signal of each T/R passages of antenna array；
Step 3, pulse pressure processing is carried out to the T/R channel pulses rate-aided signal of record, obtain each T/R passages hair of front
Penetrate/reception pattern under amplitude and phase distribution ET/R(f)；
Step 4, by the width distributed mutually E under T/R channel emissions/reception patternT/RDeduct antenna calibration network amplitude phase error
Data EScalorNetAfterwards, the true drive factor I of radar antenna battle array is obtainedmn；
Step 5, using the antenna subarray patterns at diverse location, by far field principle of stacking, interpolation solve transmitting/
The field distribution of assigned direction under reception pattern, and then obtain antenna array far field two-dimensional directional figure.
Preferably, the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data uses pulse
The width distributed mutually of the antenna array list T/R passages obtained after compression processing.
Preferably, the amplitude phase error data EScalorNet(f) it is the intermediate frequency error information after floor treatment.
Preferably, the exemplary position antenna subarray patterns Fmn(u, v) is the antenna submatrix finely solved by ground
Intermediate frequency pattern data.
The positive effect of the present invention is：The present invention is realized to phase on the premise of without antenna damnification system
Control the validation test of array antenna directional diagram performance (nearly intermediate frequency is averaged with interior).The present invention solves conventional radar satellite phased array
Antenna tests the problem of each stage directional diagram performance is without effective examination checking means in whole star, substantially increases whole star stage radar
The testing efficiency of load, shorten the lead time of whole star.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention.
Fig. 2 is the front view of antenna distance azimuthal coordinates system.
Fig. 3 is the inverted view of antenna distance azimuthal coordinates system.
Fig. 4 is the schematic diagram that aerial ground tests coordinate system.
Fig. 5 is that 32 rows (y) × 12 arrange (x) squaerial orientation transmitting pattern inversion result schematic diagram.
Fig. 6 is that 32 rows (y) × 12 arrange (x) squaerial distance to transmitting pattern inversion result schematic diagram.
Embodiment
Present pre-ferred embodiments are provided below in conjunction with the accompanying drawings, to describe technical scheme in detail.
As shown in figure 1, the present invention is the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data,
It comprises the following steps：
Step 1, obtaining satellite-borne synthetic aperture radar antenna calibration network during the unit product test of ground respectively, respectively calibration is logical
The amplitude phase error data E in roadScalorNetAnd exemplary position antenna subarray patterns F (f)mn(u,v)；
Step 2, the radar running parameter such as suitable bandwidth, pulsewidth is selected, calibration work is tested in radar system list T/R
Under pattern, obtain one by one and record transmitting/reception pulse scale signal of each T/R passages of antenna array；
Step 3, pulse pressure processing is carried out to the T/R channel pulses rate-aided signal of record, obtain each T/R passages hair of front
Penetrate/reception pattern under amplitude and phase distribution ET/R(f)；
Step 4, by the width distributed mutually E under T/R channel emissions/reception patternT/RDeduct antenna calibration network amplitude phase error
Data EScalorNetAfterwards, the true drive factor I of radar antenna battle array is obtainedmn；
Step 5, using the antenna subarray patterns at diverse location, by far field principle of stacking, interpolation solve transmitting/
The field distribution of assigned direction under reception pattern, and then obtain antenna array far field two-dimensional directional figure.
This method uses the width distributed mutually of the antenna array list T/R passages obtained after process of pulse-compression, so actually asks
The single T/R passages width distributed mutually solved is regarded as " with the interior average " of width distributed mutually, and the directional diagram solved is in
Frequency directional diagram or with interior mean direction figure.
Antenna calibration network used in ground inverting antenna radiation pattern respectively calibrates the amplitude phase error data E of passageScalorNet
(f) it is the intermediate frequency error information after floor treatment, can so reduces error.
Exemplary position antenna subarray patterns F used in ground inverting antenna radiation patternmn(u, v) is finely to be asked by ground
The antenna submatrix intermediate frequency pattern data of solution, such result are more accurate.
With the row of 32 rows (y to) × 12 (x to) distributed rectangular phased array antenna, (antenna bearingt is to unit interval dx below
=0.6 λ, distance is to unit interval dy=0.7 λ) exemplified by, as shown in Figures 2 to 6, the method for the present invention is done further in detail
Narration：
Antenna bearingt range coordinate system (R, A) as shown in Figure 2 and Figure 3 is established, in the coordinate system, distance is to scan angle
For R (∠ DOE), orientation scan angle is A (∠ EOP).For ease of directional diagram solve, often by antenna bearingt range coordinate system (A,
R) it is transformed to carry out under (u, v) coordinate system, transformational relation sees below formula (1) between the two：
In aerial ground single machine test, the row of 32 rows (y to) × 12 (x to) distributed rectangular phased array antenna is obtained respectively and is determined
Mark network respectively calibrates the intermediate frequency amplitude phase error data E of passageScalorNetAnd exemplary position antenna submatrix intermediate frequency directional diagram F (f)mn(u,
v)；
Obtain single channel calibration data：The radar running parameter such as suitable bandwidth, pulsewidth is selected, in radar system list T/R
Test under calibration work pattern, obtain one by one and record transmitting/reception pulse scale signal of each T/R passages of antenna array；
S4：Pulse pressure processing, each T/R channel emissions of acquisition front/connect are carried out to the T/R channel pulses rate-aided signal of record
Amplitude and phase distribution matrix E under receipts patternT/R(f)；
S5：By the width distributed mutually E under T/R channel emissions/reception patternT/RDeduct antenna calibration network amplitude phase error data
EScalorNetAfterwards, the true drive factor I of radar antenna battle array is obtainedmn；
Using the antenna subarray patterns at diverse location, by far field principle of stacking, interpolation solves transmit/receive formula
The field distribution of lower assigned direction, and then obtain antenna array far field two-dimensional directional figure (nearly intermediate frequency is averaged with interior).
Fig. 5 and Fig. 6 sets forth row (x) rectangle phased array antenna orientation transmitting pattern of 32 rows (y) × 12 and away from
Descriscent transmitting pattern inversion result.
In summary, this method can be verified effectively under without antenna damnification system precondition to radar antenna performance
Confirm, filled up the blank of whole star stage radar antenna performance verification means, be the strong supplement to radar load test means.
Compared with prior art, the present invention has the following advantages that and good effect：
(1) method of the invention proposes a kind of satellite-borne synthetic aperture radar antenna radiation pattern based on internal calibration data and obtained
Method is taken, on the premise of it can not use antenna radiation pattern near-field measurement system, utilizes radar antenna list T/R channel emissions/connect
Receive calibration data, antenna calibration network intermediate frequency amplitude phase error data, and exemplary position antenna submatrix intermediate frequency directional diagram and inverting
The nearly intermediate frequency of radar antenna (or with interior average) directional diagram performance.
(2) method of the invention has been filled up before and after the whole star stage items large test of radar satellite and experiment, can not be made
During with antenna damnification system, the blank of phased array antenna performance test and checking means, perfect whole star stage radar carries
The checking of lotus and means of testing.
(3) the inventive method is equally applicable to follow-up all radar satellite phased arrays with single T/R calibration works pattern
Antenna, in the performance verification test in whole star each stage.
In summary, using the inventive method, before and after can fundamentally solving whole star stage items large-scale experiment, in nothing
When method uses antenna damnification system, the problem of radar antenna performance verification and means of testing lack, be to whole star stage thunder
Up to load test and the strong supplement of checking means.Before the present invention is to promptly and accurately obtaining whole star items large test and experiment
Afterwards, phased array antenna performance change situation and product working status have extremely remarkable result.
Particular embodiments described above, technical problem, technical scheme and the beneficial effect of the solution to the present invention are carried out
It is further described, should be understood that the specific embodiment that the foregoing is only of the invention, be not limited to
The present invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., it should be included in this
Within the protection domain of invention.
Claims (4)
1. a kind of satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data, it is characterised in that described
Satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data comprises the following steps：
Step 1, satellite-borne synthetic aperture radar antenna calibration network is obtained during the unit product test of ground respectively and respectively calibrates passage
Amplitude phase error data EScalorNetAnd exemplary position antenna subarray patterns F (f)mn(u,v)；
Step 2, the radar running parameter such as suitable bandwidth, pulsewidth is selected, calibration work pattern is tested in radar system list T/R
Under, obtain one by one and record transmitting/reception pulse scale signal of each T/R passages of antenna array；
Step 3, pulse pressure processing, each T/R channel emissions of acquisition front/connect are carried out to the T/R channel pulses rate-aided signal of record
Amplitude and phase distribution E under receipts patternT/R(f)；
Step 4, by the width distributed mutually E under T/R channel emissions/reception patternT/RDeduct antenna calibration network amplitude phase error data
EScalorNetAfterwards, the true drive factor I of radar antenna battle array is obtainedmn；
Step 5, using the antenna subarray patterns at diverse location, by far field principle of stacking, interpolation solves transmitting/reception
The field distribution of assigned direction under pattern, and then obtain antenna array far field two-dimensional directional figure.
2. the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data as claimed in claim 1, its
It is characterised by, the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data is using at pulse compression
The width distributed mutually of the antenna array list T/R passages obtained after reason.
3. the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data as claimed in claim 1, its
It is characterised by, the amplitude phase error data EScalorNet(f) it is the intermediate frequency error information after floor treatment.
4. the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data as claimed in claim 1, its
It is characterised by, the exemplary position antenna subarray patterns Fmn(u, v) is the antenna submatrix intermediate frequency side finely solved by ground
To diagram data.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108983199A (en) * | 2018-05-24 | 2018-12-11 | 莱茵检测认证服务（中国）有限公司 | A kind of performance verification method of laser radar |
| CN110018460A (en) * | 2019-04-11 | 2019-07-16 | 上海卫星工程研究所 | The far-field measurement method of phase difference between the whole star stage plate of satellite-borne synthetic aperture radar |
| CN110703247A (en) * | 2019-10-30 | 2020-01-17 | 中国科学院电子学研究所 | Wave position information detection method, wave position information detection device and storage medium |
| CN112098961A (en) * | 2020-09-09 | 2020-12-18 | 北京空间飞行器总体设计部 | Method for designing and analyzing data of multi-polarization SAR (synthetic aperture radar) load internal calibration mode |
| CN113281576A (en) * | 2021-05-20 | 2021-08-20 | 中国电子科技集团公司第十四研究所 | Antenna directional pattern testing method based on internal calibration multi-wave-position testing |
| CN113625231A (en) * | 2021-08-24 | 2021-11-09 | 南京理工大学 | Phased array radar wave control system based on FPGA and self-checking method |
| CN114185016A (en) * | 2022-02-16 | 2022-03-15 | 中国科学院空天信息创新研究院 | Method for measuring and compensating amplitude-phase error between channels of multi-channel satellite-borne SAR (synthetic aperture radar) antenna |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983199A (en) * | 2018-05-24 | 2018-12-11 | 莱茵检测认证服务（中国）有限公司 | A kind of performance verification method of laser radar |
| CN110018460A (en) * | 2019-04-11 | 2019-07-16 | 上海卫星工程研究所 | The far-field measurement method of phase difference between the whole star stage plate of satellite-borne synthetic aperture radar |
| CN110018460B (en) * | 2019-04-11 | 2021-07-13 | 上海卫星工程研究所 | Far field measurement method for phase difference between whole satellite phases of satellite-borne synthetic aperture radar |
| CN110703247A (en) * | 2019-10-30 | 2020-01-17 | 中国科学院电子学研究所 | Wave position information detection method, wave position information detection device and storage medium |
| CN112098961A (en) * | 2020-09-09 | 2020-12-18 | 北京空间飞行器总体设计部 | Method for designing and analyzing data of multi-polarization SAR (synthetic aperture radar) load internal calibration mode |
| CN113281576A (en) * | 2021-05-20 | 2021-08-20 | 中国电子科技集团公司第十四研究所 | Antenna directional pattern testing method based on internal calibration multi-wave-position testing |
| CN113281576B (en) * | 2021-05-20 | 2022-11-18 | 中国电子科技集团公司第十四研究所 | Antenna directional pattern testing method based on internal calibration multi-wave-position testing |
| CN113625231A (en) * | 2021-08-24 | 2021-11-09 | 南京理工大学 | Phased array radar wave control system based on FPGA and self-checking method |
| CN114185016A (en) * | 2022-02-16 | 2022-03-15 | 中国科学院空天信息创新研究院 | Method for measuring and compensating amplitude-phase error between channels of multi-channel satellite-borne SAR (synthetic aperture radar) antenna |
| CN114185016B (en) * | 2022-02-16 | 2022-05-17 | 中国科学院空天信息创新研究院 | Method for measuring and compensating amplitude-phase error between channels of multi-channel satellite-borne SAR (synthetic aperture radar) antenna |
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