CN107238825B - The test method of RCS when a kind of realization antenna transmitting using vector network instrument - Google Patents
The test method of RCS when a kind of realization antenna transmitting using vector network instrument Download PDFInfo
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- CN107238825B CN107238825B CN201710429780.5A CN201710429780A CN107238825B CN 107238825 B CN107238825 B CN 107238825B CN 201710429780 A CN201710429780 A CN 201710429780A CN 107238825 B CN107238825 B CN 107238825B
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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
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The invention discloses the test methods of RCS when realization antenna transmitting using vector network instrument a kind of, belong to the field of test technology, test platform is realized using RCS measuring technology comprising multiport vector network analyzer, the second auxiliary antenna, test table, calibration component, the first polarization turntable, the second polarization turntable, inhales wave screen wind, third auxiliary antenna, third polarization turntable and tested antenna holder at the first auxiliary antenna.The present invention using multiport vector network analyzer wherein all the way signal source as tested antenna excitation, another way signal source is as RCS test and excitation, to realize the test of tested antenna RCS in transmit state, solution is provided for Antenna/RCS test under emission state, test method is practical, and test result validity is higher.
Description
Technical field
The invention belongs to the field of test technology, and in particular to RCS when a kind of realization antenna transmitting using vector network instrument
Test method.
Background technique
The low RCS design of antenna requirement of modern stealthy equipment, such antenna are being developed, must carry out RCS in production process
Test verifying work.Different from conventional objective body, since antenna itself is the medium of electromagnetic signal space conversion, RCS is main
It is made of structural scattering item and mode dispersion item, wherein structural scattering item is related to antenna shapes, mode dispersion item and antenna end
Mouth impedance matching is related, if port Impedance matching is poor, radar electromagnetic wave reflects after being received by the antenna through port, reflection letter
It number is superimposed with structural scattering echo, increases Antenna/RCS.Therefore for antenna class target, to obtain its actual working state
RCS, when test, need to simulate its actual working state as far as possible, are at transmitting or reception state.
A kind of current existing RCS test macro is as shown in Figure 1.Test basic principle are as follows: the signal source of lattice gauge is to quilt
Observation beta radiation electromagnetic wave, the antenna scattering electromagnetic wave, lattice gauge, which receives, stores tested antenna in different orientations difference pitching
Scatter echo signal (turntable, which drives, to be realized) under angle, realizes tested antenna in different positions finally by calibration and data processing
RCS test.For the test of single station angle, actual test is in the process by the way of dual-mode antenna lay out in parallel；Dual station angle is surveyed
Examination, actual test need to separate dual-mode antenna defined angle and test in the process.
Current existing another kind RCS test macro is as shown in Figure 2.Test basic principle are as follows: the signal source of lattice gauge to
Tested aerial radiation electromagnetic wave, the antenna scattering electromagnetic wave, a receiver of lattice gauge, which receives, stores tested antenna in difference
Scatter echo signal (turntable, which drives, to be realized) under the difference pitch angle of azimuth, it is tested finally by calibration and data processing realization
RCS is tested antenna in different positions.For the test of single station angle, the side of dual-mode antenna lay out in parallel is used during actual test
Formula；Dual station angle is tested, needs to separate dual-mode antenna defined angle during actual test and tests.Lattice gauge
Another receiver is connected by cable with tested antenna, is received and is stored tested antenna under different orientations difference pitch angle
Signal (turntable, which drives, to be realized) is received, tested Antenna Pattern Measuring Test can be synchronously completed.
When carrying out Antenna/RCS test using RCS test macro shown in Fig. 1, it is tested antenna port open circuit, RCS survey can be reflected
Excitation Electromagnetic Wave when examination, therefore the Antenna/RCS measured includes mode dispersion item, RCS under test result and actual working state
Value differs greatly.
When carrying out day line target RCS test using RCS test macro shown in Fig. 2, due to tested antenna port and lattice gauge
Receiver is connected, and can accomplish preferable impedance matching, can substantially reduce the influence of mode dispersion item, test result and tested antenna
It is suitable when practical reception state.But this method provides only the test method that tested antenna is in reception state, for transmitting-receiving
The discrepant antenna of performance, this method cannot achieve the simulation of tested antenna emission state lower port impedance operator, cannot achieve
The test of RCS when tested antenna is in emission state.
In conclusion current RCS test method cannot achieve the test of RCS when antenna emits.
Summary of the invention
For the above-mentioned technical problems in the prior art, day is realized using vector network instrument the invention proposes a kind of
The test method of RCS when line emits, design rationally, overcome the deficiencies in the prior art, have good effect.
To achieve the goals above, the present invention adopts the following technical scheme:
The test method of RCS, is realized using RCS measuring technology and is tested when a kind of realization antenna transmitting using vector network instrument
Platform comprising multiport vector network analyzer, the first auxiliary antenna, the second auxiliary antenna, test table, calibration component,
One polarization turntable, inhales wave screen wind, third auxiliary antenna, third polarization turntable and tested antenna holder at the second polarization turntable；
The test method of RCS when realizing that antenna emits using vector network instrument, specifically comprises the following steps:
Step 1: inhibition processing is carried out to test site interference；
Interference of the test table including stage body, table top gap is blocked by inhaling wave screen wind, to tested antenna
Bracket realizes low scattering purpose by material type selecting and configuration design；
Step 2: building test platform；
First port, second port and the 4th port of vector network analyzer are respectively through microwave cable and the second auxiliary day
Three line, the first auxiliary antenna and third auxiliary antenna auxiliary antennas are connected, the first auxiliary antenna, the second auxiliary antenna and the
Three auxiliary antennas are respectively placed on the first polarization turntable, the second polarization turntable and third polarization turntable, wherein the first auxiliary day
For two auxiliary antennas of line and the second auxiliary antenna side by side close to placing, dual-mode antenna spacing meets single station test request, and third is auxiliary
Antenna is helped to place according to dual station angle test request；The third port of vector network analyzer is through microwave cable and tested antenna phase
Even, tested antenna is fixedly placed on tested antenna holder；According to the different polarization scattering characteristics testing requirements for being tested antenna, choosing
With the first polarization turntable, the second polarization turntable and third polarization turntable, achievable various polarization RCS tests；
Step 3: control and test；Specifically comprise the following steps:
Step 3.1: carrying out the port configuration of vector network analyzer；
First port, third port are configured as output to port, configure receiving port for second port, the 4th port,
The output frequency that first port is arranged is f1, output power P1, and the output frequency of third port is f2, output power P2,
Reception intermediate-frequency bandwidth is that B, f1 ≠ f2, and f1 and the absolute value of the difference of f2 are greater than intermediate-frequency bandwidth B；
Step 3.2: control test table drives tested antenna holder and tested antenna movement and positions Mr. Yu's fixed pose
Angle；
Step 3.3: the third port transmitting signal of vector network analyzer to tested antenna is exported by tested antenna,
Antenna Operation is tested in emission state；First port emits signal and separates through the internal signal separator of vector network analyzer
Afterwards, a part is sent to its internal reference signal receiver, and another part is through the second auxiliary antenna to tested aerial radiation；
Step 3.4: being received by the first auxiliary antenna and sent to vector net by single station scattered signal of tested antenna-reflected
The second port of network analyzer, the EM scattering signal by being tested antenna-reflected are sent after being received by third auxiliary antenna to vector
4th port of Network Analyzer, the internal reference receiving channel of vector network analyzer, second port, the 4th port connect simultaneously
Internal reference signal, single station scattered signal and EM scattering signal are received, is carried out by the internal processor of vector network analyzer
Operation obtains the amplitude and phase information of scattered signal under tested antenna attitude angle；
Step 3.5: extracting the vector data of single the station scattered signal and EM scattering signal in simultaneously storing step 3.4；
Step 3.6: control test table drives tested antenna to be positioned at next Fixed posture angle, repeats step 3.3- step
3.5, until completing the acquisition storage for being tested antenna Dan Zhanyu EM scattering echo data within the scope of certain movement；
Step 4: calibration calibration；Specifically comprise the following steps:
Step 4.1: keeping parameter constant, remove tested antenna, backscatter echo vector data is completed according to step 3
Acquisition storage；
Step 4.2: calibration component being placed on tested antenna holder, and the placement location phase of its position and tested antenna
Together, it is stored according to the acquisition that step 3 completes calibration component scatter echo vector data；
Step 4.3: background, calibration component, tested three groups of scatter echo data of antenna being respectively processed, it is fixed to complete calibration
Mark, obtains the RCS value under tested antenna emission state.
Preferably, in step 1, material selection polystyrene；Shape selects the conical form at certain inclination angle.
Preferably, in step 2, single station test request is antenna spacing relative target distance institute into 3 ° of subtended angle <；Dual station
Angle test request is antenna spacing relative target distance institute into subtended angle >=3 °.
Preferably, various polarization RCS tests include HH, VV, HV, VH polarization RCS test, wherein H represents level, and V is represented
Vertically.
Preferably, in step 3.1, the absolute value of the difference of f1 and f2 are 1000 times of intermediate-frequency bandwidth B.
Advantageous effects brought by the present invention:
1, the present invention using multiport vector network analyzer wherein signal source is another as tested antenna excitation all the way
Road signal source is day under emission state to realize the test of tested antenna RCS in transmit state as RCS test and excitation
Line RCS test provides solution.
2, test method is practical: on the basis of traditional RCS checkout area, need to only use multiport network instrument instead
Test is completed, without carrying out big change to original test equipment and place, method practicability is stronger.
3, test result validity is higher: compared with conventional testing techniques, this method simulates tested antenna when testing real
Border working condition, test mode and actual working state similarity are high, therefore test RCS closer to tested antenna real work
It is under state as a result, test result reference value is stronger.
Detailed description of the invention
Fig. 1 is conventional aerial RCS test method schematic diagram.
Fig. 2 is another conventional aerial RCS test method schematic diagram.
Fig. 3 is that RCS measuring technology realizes platform schematic diagram under antenna emission state.
Wherein, 1- vector network analyzer；101- first port；102- second port；103- third port；104- the 4th
Port；The first auxiliary antenna of 2-；The second auxiliary antenna of 3-；4- is tested antenna；5- test table；6- calibration component；7- first polarizes
Turntable；The polarization turntable of 8- second；9- inhales wave screen wind；10- third auxiliary antenna；11- third polarization turntable；12- is tested antenna branch
Frame.
Specific embodiment
With reference to the accompanying drawing and specific embodiment invention is further described in detail:
The test method of RCS, is realized using RCS measuring technology and is tested when a kind of realization antenna transmitting using vector network instrument
Platform, as shown in Figure 3 comprising multiport vector network analyzer 1, the first auxiliary antenna 2, the second auxiliary antenna 3, test turn
Platform 5, inhales wave screen wind 9, third auxiliary antenna 10, third polarization turntable at the polarization polarization of turntable 7, second of calibration component 6, first turntable 8
11 and tested antenna holder 12；
The test method of RCS when realizing that antenna emits using vector network instrument, specifically comprises the following steps:
(1) test site AF panel is handled: for low RCS antenna measurement, place interference is to influence measuring accuracy
An important factor for, it is therefore necessary to it carries out place interference analysis and is handled with inhibition, stitched for turntable stage body, the table top of test table 5
The interference such as gap take suction wave screen wind 9 to block measure, for tested antenna holder 12, pass through material (polystyrene) type selecting and shape
Low scattering purpose is realized in (certain inclination angle conical form) design.
(2) test platform is built: the first port 101 of vector network analyzer 1, second port 102, the 4th port 104
It is connected respectively through microwave cable with 10 3 the second auxiliary antenna 3, the first auxiliary antenna 2 and third auxiliary antenna auxiliary antennas,
Wherein side by side close to placing, antenna spacing meets single station angle and surveys for 3 two the first auxiliary antenna 2, the second auxiliary antenna auxiliary antennas
Examination requires, and third auxiliary antenna 10 is placed according to dual station angle test request.The third port 103 of vector network analyzer 1 is through micro-
Wave cable is connected with tested antenna 4, and tested antenna 4 is fixedly placed on tested antenna holder 12, can match the depending on testing requirement
One polarization turntable 7, second polarization turntable 8 and third polarization turntable 11, auxiliary antenna is placed on polarization turntable, achievable
Various polarization RCS tests.
(3) system control and test: starting test program, the port that system software completes vector network analyzer 1 are matched
It sets, wherein first port 101, third port 103 are configured as output to, and second port 102, the 4th port 104 are configured to receive, if
Setting 101 output frequency of first port is f1, and output power P1,103 output frequency of third port is f2, output power P2, is received
Intermediate-frequency bandwidth is B, is paid special attention to, and f1 is necessary for different numerical value from f2, and difference should be greater than intermediate-frequency bandwidth B, be recommended as midband
1000 times of wide B.System software controls test table 5 drives tested antenna holder 12 to move with tested antenna 4 and position Mr. Yu
Fixed posture angle (orientation, pitching), the third port 103 of vector network analyzer 1 emit signal and send to tested antenna 4, pass through
Tested antenna 4 exports, and tested antenna 4 works in emission state, and first port 101 emits signal through vector network analyzer 1
After the separation of internal signal separator, a part is sent to its internal reference signal receiver, and another part is through the second auxiliary antenna 3
It is radiated to tested antenna 4, the scattered signal after being tested antenna 4 and reflecting is sent after being received by the first auxiliary antenna 2 to second end
Mouth 102, the EM scattering signal after being tested antenna 4 and reflecting are sent after being received by third auxiliary antenna 10 to the 4th port 104,
Internal reference receiving channel, second port 102, the 4th port 104 while the receive microwave signal of vector network analyzer 1, place
It is stored after managing and extracting amplitude, phase information, control software extracts and stores the tested antenna attitude angle and places an order station, EM scattering
Signal phasor data, the tested antenna 4 of the drive of system software controls test table 5 is positioned at next Fixed posture angle, and (orientation is bowed
Face upward), test process above is repeated, according to the process, tested antenna Dan Zhanyu dual station is finally completed within the scope of certain movement and dissipates
Penetrate the acquisition storage of echo data.
(4) calibration calibration: keeping system equipment parameter constant, removes tested antenna 4, completes according to step (3) process
The acquisition storage of backscatter echo vector data；Calibration component 6 is placed on tested antenna holder 12, and position and tested antenna
4 placement location is identical, completes the acquisition storage of 6 scatter echo vector data of calibration component according to step (3) process.By background, school
Quasi- part, tested three groups of scatter echo data of antenna bring calibration software processing into, complete calibration calibration, obtain tested antenna emitting shape
RCS value under state.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (5)
1. the test method of RCS when a kind of realization antenna transmitting using vector network instrument, it is characterised in that: test skill using RCS
Art realize test platform comprising multiport vector network analyzer, the first auxiliary antenna, the second auxiliary antenna, test table,
Calibration component, the second polarization turntable, inhales wave screen wind, third auxiliary antenna, third polarization turntable and by observation at the first polarization turntable
Line bracket；
The test method of RCS when realizing that antenna emits using vector network instrument, specifically comprises the following steps:
Step 1: inhibition processing is carried out to test site interference；
Interference of the test table including stage body, table top gap is blocked by inhaling wave screen wind, to tested antenna holder,
Low scattering purpose is realized by material type selecting and configuration design；
Step 2: building test platform；
First port, second port and the 4th port of vector network analyzer respectively through microwave cable and the second auxiliary antenna,
Three auxiliary antennas of first auxiliary antenna and third auxiliary antenna are connected, the first auxiliary antenna, the second auxiliary antenna and third
Auxiliary antenna is respectively placed on the first polarization turntable, the second polarization turntable and third polarization turntable, wherein the first auxiliary antenna
With two auxiliary antennas of the second auxiliary antenna side by side close to placing, dual-mode antenna spacing meets single station test request, third auxiliary
Antenna is placed according to dual station angle test request；The third port of vector network analyzer is connected through microwave cable with tested antenna,
Tested antenna is fixedly placed on tested antenna holder；According to the different polarization scattering characteristics testing requirements for being tested antenna, apolegamy
First polarization turntable, the second polarization turntable and third polarization turntable, achievable various polarization RCS tests；
Step 3: control and test；Specifically comprise the following steps:
Step 3.1: carrying out the port configuration of vector network analyzer；
First port, third port are configured as output to port, configure receiving port for second port, the 4th port, is arranged
The output frequency of first port is f1, and output power P1, the output frequency of third port is f2, output power P2, is received
Intermediate-frequency bandwidth is that B, f1 ≠ f2, and f1 and the absolute value of the difference of f2 are greater than intermediate-frequency bandwidth B；
Step 3.2: control test table drives tested antenna holder and tested antenna movement and positions Mr. Yu's Fixed posture angle；
Step 3.3: the third port of vector network analyzer emits signal and is tested to tested antenna by tested antenna output
Antenna Operation is in emission state；First port emits signal after the separation of the internal signal separator of vector network analyzer,
A part is sent to its internal reference signal receiver, and another part is through the second auxiliary antenna to tested aerial radiation；
Step 3.4: single station scattered signal by tested antenna-reflected is received by the first auxiliary antenna and is sent to vector network point
The second port of analyzer, the EM scattering signal by being tested antenna-reflected are sent after being received by third auxiliary antenna to vector network
4th port of analyzer, in the internal reference receiving channel of vector network analyzer, second port, the 4th port receive simultaneously
Portion's reference signal, single station scattered signal and EM scattering signal carry out operation by the internal processor of vector network analyzer,
Obtain the amplitude and phase information of scattered signal under tested antenna attitude angle；
Step 3.5: extracting the vector data of single the station scattered signal and EM scattering signal in simultaneously storing step 3.4；
Step 3.6: control test table drives tested antenna to be positioned at next Fixed posture angle, repeats step 3.3- step 3.5,
Until completing the acquisition storage for being tested antenna Dan Zhanyu EM scattering echo data within the scope of certain movement；
Step 4: calibration calibration；Specifically comprise the following steps:
Step 4.1: keeping parameter constant, remove tested antenna, the acquisition of backscatter echo vector data is completed according to step 3
Storage；
Step 4.2: calibration component being placed on tested antenna holder, and its position is identical as the placement location of tested antenna, root
The acquisition storage of calibration component scatter echo vector data is completed according to step 3；
Step 4.3: background, calibration component, tested three groups of scatter echo data of antenna are respectively processed, calibration calibration is completed,
Obtain the RCS value under tested antenna emission state.
2. the method for RCS test, feature exist when the realization antenna transmitting according to claim 1 using vector network instrument
In: in step 1, material selection polystyrene；Shape selects the conical form at certain inclination angle.
3. the method for RCS test, feature exist when the realization antenna transmitting according to claim 1 using vector network instrument
In: in step 2, single test request of standing is antenna spacing relative target distance institute into 3 ° of subtended angle <；Dual station angle test request is
Antenna spacing relative target distance institute is at subtended angle >=3 °.
4. the method for RCS test, feature exist when the realization antenna transmitting according to claim 1 using vector network instrument
In: various polarization RCS tests include HH, VV, HV, VH polarization RCS test, wherein H represents level, and V represents vertical.
5. the method for RCS test, feature exist when the realization antenna transmitting according to claim 1 using vector network instrument
In: in step 3.1, the absolute value of the difference of f1 and f2 are 1000 times of intermediate-frequency bandwidth B.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2804836C1 (en) * | 2023-05-11 | 2023-10-06 | Федеральное государственное бюджетное учреждение науки Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН) | Method and system for determining antenna characteristics at measuring site |
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| CN107238825A (en) | 2017-10-10 |
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