CN107340434B - 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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- CN107340434B CN107340434B CN201710344355.6A CN201710344355A CN107340434B CN 107340434 B CN107340434 B CN 107340434B CN 201710344355 A CN201710344355 A CN 201710344355A CN 107340434 B CN107340434 B CN 107340434B
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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 comprising following steps：Step 1, when ground single machine product test, obtain the amplitude phase error data and exemplary position antenna subarray patterns that satellite-borne synthetic aperture radar antenna calibration network respectively calibrates channel respectively；Step 2 selects the radars running parameter such as suitable bandwidth, pulsewidth, in the case where radar system list T/R tests calibration work mode, transmitting/reception pulse scale signal etc. for obtaining one by one and recording each channel T/R of antenna array.The present invention realizes the validation test to phased array antenna directional diagram performance (nearly intermediate frequency or with interior average) under the premise of no antenna damnification system, solve the problems, such as that conventional radar satellite phased array antenna tests each stage directional diagram performance without effective examination verifying means in whole star, the testing efficiency for substantially increasing whole star stage radar load, shortens the lead time of whole star.
Description
Technical field
The present invention relates to a kind of whole star radar load testing methods of radar satellite, are based on internal calibration number more particularly to one kind
According to satellite-borne synthetic aperture radar antenna direction picture capturing method.
Background technique
Synthetic aperture radar is a kind of works in the active remote sensing device of 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 other remote sensor irreplaceable roles.
Flat surface active phased array antenna due to have emission peak power is high, antenna gain is big, antenna beam can figuration, and
The features such as being switched fast with wide-angle scanning, is widely used in spaceborne synthetic aperture radar (SAR) system.But phased array antenna
Active single machine is large number of, and system composition is extremely complex, mainly passes through antenna damnification system in the phased array antenna development stage
System measures its directional diagram performance, confirms to the state of its front product.General broadband satellite-borne synthetic aperture thunder
Up to system, have signal bandwidth wide, the features such as Working wave position is more.By test waves bit quantity, test frequency point quantity and near field
The factors such as measuring system power of test influence, and the general phased array antenna Pattern measurement period is all long.
After phased array antenna delivers whole star, can be undergone with whole star the star test of radar subsystem dress, whole star mechanical test,
Thermal balance and thermal vacuum test, EMC test, remanent magnetism test and Ground Application and the test of fortune control system docking, whole star mould fly to test
With it is seasoned test etc. whole star large test and experimental stage.Due to by test site, condition and whole lead time in star stage
Etc. factors limitation, can not be tested in whole star and various test stages, using antenna damnification system, to undergoing whole star items to test
Test comparison and confirmation are carried out with the phased array antenna performance of test.It can only be by the limited telemetry parameter of antenna array to front
Product Status carries out area monitoring.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of satellite-borne synthetic aperture radar days based on internal calibration data
Line direction picture capturing method is able to solve conventional synthesis aperture radar satellite phased array antenna in whole star and tests each stage direction
The problem of figure performance is without effective verifying means.
The present invention is to 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, which is characterized in that the satellite-borne synthetic aperture thunder based on internal calibration data
Include the following steps up to antenna direction picture capturing method：
Step 1, when ground single machine product test, which obtains satellite-borne synthetic aperture radar antenna calibration network respectively and respectively calibrate, leads to
The amplitude phase error data E in roadScalorNet(f) and exemplary position antenna subarray patterns Fmn(u,v)；
Step 2 selects the radars running parameter such as suitable bandwidth, pulsewidth, tests calibration work in radar system list T/R
Under mode, the transmitting/reception pulse scale signal in each channel T/R of antenna array is obtained and recorded one by one；
Step 3 carries out pulse pressure processing to the T/R channel pulse rate-aided signal of record, obtains each channel the T/R hair of front
Penetrate/reception pattern under amplitude and phase distribution ET/R(f)；
Width under T/R channel emission/reception pattern is mutually distributed E by step 4T/RIt deducts antenna and calibrates 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 different 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 in the channel antenna array list T/R obtained after compression processing is mutually distributed.
Preferably, the amplitude phase error data EScalorNetIt (f) 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 that：The present invention realizes under the premise of no antenna damnification system to phase
Control the validation test of array antenna directional diagram performance (nearly intermediate frequency or being 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 verifying means in whole star, substantially increases whole star stage radar
The testing efficiency of load shortens the lead time of whole star.
Detailed description of the invention
Fig. 1 is flow chart of the 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 32 rows (y) × 12 column (x) squaerial orientation transmitting pattern inversion result schematic diagrames.
Fig. 6 is that 32 rows (y) × 12 arrange (x) squaerial distances to transmitting pattern inversion result schematic diagram.
Specific embodiment
Present pre-ferred embodiments are provided with reference to the accompanying drawing, in order to explain the technical scheme of the invention 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 includes the following steps：
Step 1, when ground single machine product test, which obtains satellite-borne synthetic aperture radar antenna calibration network respectively and respectively calibrate, leads to
The amplitude phase error data E in roadScalorNet(f) and exemplary position antenna subarray patterns Fmn(u,v)；
Step 2 selects the radars running parameter such as suitable bandwidth, pulsewidth, tests calibration work in radar system list T/R
Under mode, the transmitting/reception pulse scale signal in each channel T/R of antenna array is obtained and recorded one by one；
Step 3 carries out pulse pressure processing to the T/R channel pulse rate-aided signal of record, obtains each channel the T/R hair of front
Penetrate/reception pattern under amplitude and phase distribution ET/R(f)；
Width under T/R channel emission/reception pattern is mutually distributed E by step 4T/RIt deducts antenna and calibrates 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 different 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 in the channel antenna array list T/R obtained after process of pulse-compression to be mutually distributed, and actually asks in this way
Single channel the T/R width solved, which is mutually distributed, is regarded as " with interior mean value " that width is mutually distributed, and the directional diagram solved is in
Frequency directional diagram or with interior mean direction figure.
The calibration network of antenna used in ground inverting antenna radiation pattern respectively calibrates the amplitude phase error data E in channelScalorNet
(f) it is the intermediate frequency error information after floor treatment, error can be reduced in this way.
Exemplary position antenna subarray patterns F used in ground inverting antenna radiation patternmn(u, v) is finely to ask by ground
The antenna submatrix intermediate frequency pattern data of solution, such result are more accurate.
With 32 rows (y to) × 12 column (x to) distributed rectangular phased array antenna, (antenna bearingt is to unit interval dx below
=0.6 λ, distance as shown in Figures 2 to 6, are done further in detail method of the invention to for unit interval dy=0.7 λ)
Narration：
Antenna bearingt as shown in Figure 2 and Figure 3 is established apart from coordinate system (R, A), in the coordinate system, distance is to scan angle
For R (∠ DOE), orientation scan angle is A (∠ EOP).To be solved convenient for directional diagram, often by antenna bearingt apart from 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, it is fixed that 32 rows (y to) × 12 column (x to) distributed rectangular phased array antenna is obtained respectively
Mark network respectively calibrates the intermediate frequency amplitude phase error data E in channelScalorNet(f) and exemplary position antenna submatrix intermediate frequency directional diagram Fmn(u,
v)；
Obtain single channel calibration data：The radars running parameter such as suitable bandwidth, pulsewidth is selected, in radar system list T/R
It tests under calibration work mode, obtains and record the transmitting/reception pulse scale signal in each channel T/R of antenna array one by one；
S4：Pulse pressure processing, the acquisition each T/R channel emission of front/connect are carried out to the T/R channel pulse rate-aided signal of record
Amplitude and phase distribution matrix E under receipts modeT/R(f)；
S5：Width under T/R channel emission/reception pattern is mutually distributed ET/RIt deducts antenna and calibrates network amplitude phase error data
EScalorNetAfterwards, the true drive factor I of radar antenna battle array is obtainedmn；
Using the antenna subarray patterns at different 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 or being averaged with interior).
Fig. 5 and Fig. 6 be set forth column (x) rectangle phased array antenna orientation transmitting patterns of 32 rows (y) × 12 and away from
Descriscent transmitting pattern inversion result.
In conclusion this method can effectively verify radar antenna performance under no antenna damnification system precondition
Confirmation, has filled up the blank of whole star stage radar antenna performance verification means, has been 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 obtains
Method is taken, under the premise of not being available antenna radiation pattern near-field measurement system, utilizes radar antenna list T/R channel emission/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 filled up the whole star stage items large test of radar satellite and test front and back, can not make
When with antenna damnification system, the blank of phased array antenna performance test and verifying means, perfect whole star stage radar is carried
The verifying of lotus and means of testing.
(3) the method for the present invention is equally applicable to subsequent all radar satellite phased arrays with list T/R calibration work mode
Antenna, in the performance verification test in whole star each stage.
In conclusion using the method for the present invention, 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 the strong supplement of load test and verifying means.Before the present invention is to whole star items large test and test is promptly and accurately obtained
Afterwards, phased array antenna performance change situation and product working status have extremely remarkable result.
Particular embodiments described above, the technical issues of to solution of the invention, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (4)
1. a kind of satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data, which is characterized in that described
Satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data includes the following steps：
Step 1, when ground single machine product test, obtain satellite-borne synthetic aperture radar antenna calibration network respectively and respectively calibrate channel
Amplitude phase error data EScalorNet(f) and exemplary position antenna subarray patterns Fmn(u,v)；
Step 2 selects the radars running parameter such as suitable bandwidth, pulsewidth, tests calibration work mode in radar system list T/R
Under, the transmitting/reception pulse scale signal in each channel T/R of antenna array is obtained and recorded one by one；
Step 3 carries out pulse pressure processing, the acquisition each T/R channel emission of front/connect to the T/R channel pulse rate-aided signal of record
Amplitude and phase under receipts mode are distributed ET/R(f)；
Width under T/R channel emission/reception pattern is mutually distributed E by step 4T/RIt deducts antenna and calibrates network amplitude phase error data
EScalorNet(f) after, the true drive factor I of radar antenna battle array is obtainedmn；
Step 5, using the antenna subarray patterns at different location, by far field principle of stacking, interpolation solves transmitting/reception
The field distribution of assigned direction under mode, 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 described in claim 1,
It is characterized in that, the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data is using at pulse compression
The width in the channel antenna array list T/R obtained after reason is mutually distributed.
3. the satellite-borne synthetic aperture radar antenna direction picture capturing method based on internal calibration data as described in claim 1,
It is characterized in that, the amplitude phase error data EScalorNetIt (f) 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 described in claim 1,
It is characterized in that, 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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| 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 |
| 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 |
| CN110703247B (en) * | 2019-10-30 | 2021-10-12 | 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 |
| 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 |
| 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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| CN101464511A (en) * | 2009-01-16 | 2009-06-24 | 北京航空航天大学 | Working wave position decision method for satellite-loaded synthetic aperture radar |
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| CN101464511A (en) * | 2009-01-16 | 2009-06-24 | 北京航空航天大学 | Working wave position decision method for satellite-loaded synthetic aperture radar |
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