CN107238825A - RCS method of testing when a kind of utilization vector network instrument realizes antenna transmitting - Google Patents
RCS method of testing when a kind of utilization vector network instrument realizes antenna transmitting Download PDFInfo
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- CN107238825A CN107238825A CN201710429780.5A CN201710429780A CN107238825A CN 107238825 A CN107238825 A CN 107238825A CN 201710429780 A CN201710429780 A CN 201710429780A CN 107238825 A CN107238825 A CN 107238825A
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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
RCS method of testing when realizing antenna transmitting the invention discloses a kind of utilization vector network instrument, belong to technical field of measurement and test, test platform is realized using RCS measuring technologies, it includes multiport vector network analyzer, the first auxiliary antenna, the second auxiliary antenna, test table, calibrating device, the first polarization turntable, the second polarization turntable, suction wave screen wind, the 3rd auxiliary antenna, the 3rd polarization turntable and tested antenna holder.The present invention by the use of multiport vector network analyzer wherein signal source is used as tested antenna excitation all the way, another road signal source is used as RCS test and excitations, so as to realize tested antenna RCS in transmit state test, solution is provided for Antenna/RCS test under emission state, method of testing is practical, and test result validity is higher.
Description
Technical field
The invention belongs to technical field of measurement and test, and in particular to RCS when a kind of utilization vector network instrument realizes antenna transmitting
Method of testing.
Background technology
Modern stealthy equipment is designed with the low RCS of antenna requirement, and such antenna must carry out RCS in development, production process
Test checking work.Different from conventional objective body, because antenna is the medium of electromagnetic signal space conversion in itself, its RCS is main
It is made up of structural scattering and mode dispersion, wherein structural scattering is related to antenna shapes, mode dispersion and antenna end
Mouth impedance matching is relevant, if port Impedance matching is poor, radar electromagnetic wave reflects after being received by the antenna through port, reflection letter
Number it is superimposed with structural scattering echo, increases Antenna/RCS.Therefore for antenna class target, to obtain its actual working state
RCS, needs to simulate its actual working state as far as possible during test, is at transmitting or reception state.
A kind of current existing RCS test systems are as shown in Figure 1.Testing general principle is：The signal source of lattice gauge is to quilt
Observation beta radiation electromagnetic wave, the antenna scattering electromagnetic wave, lattice gauge receives the tested antenna of storage in the different pitching of different orientations
Scatter echo signal (turntable drive realize) under angle, realizes finally by calibration and data processing and is tested under the different postures of antenna
RCS is tested.Tested for single station angle, during actual test by the way of dual-mode antenna lay out in parallel；Surveyed for dual station angle
Examination, need during actual test by dual-mode antenna separate as defined in angle tested.
Current existing another RCS test systems are as shown in Figure 2.Testing general principle is：The signal source of lattice gauge to
Tested aerial radiation electromagnetic wave, the antenna scattering electromagnetic wave a, receiver of lattice gauge receives the tested antenna of storage in difference
Scatter echo signal (turntable, which drives, to be realized) under the difference angle of pitch of azimuth, is realized tested finally by calibration and data processing
RCS is tested under antenna difference posture.For the test of single station angle, the side of dual-mode antenna lay out in parallel is used during actual test
Formula；For the test of dual station angle, need during actual test by dual-mode antenna separate as defined in angle tested.Lattice gauge
Another receiver is connected by cable with tested antenna, receives the tested antenna of storage under the different angles of pitch of different orientations
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 systems shown in Fig. 1, antenna port open circuit is tested, RCS surveys can be reflected
Excitation Electromagnetic Wave during examination, therefore the Antenna/RCS measured includes mode dispersion, test result and RCS under actual working state
Value differs greatly.
When carrying out day line target RCS tests using RCS test systems shown in Fig. 2, due to tested antenna port and lattice gauge
Receiver is connected, and can accomplish preferable impedance matching, can significantly reduce the influence of mode dispersion, test result and tested antenna
It is suitable during actual reception state.But this method provide only the method for testing that tested antenna is in reception state, for transmitting-receiving
The discrepant antenna of performance, this method can not realize the simulation of tested antenna emission state lower port impedance operator, it is impossible to realize
RCS test when tested antenna is in emission state.
In summary, RCS test when current RCS method of testings can not realize antenna transmitting.
The content of the invention
For above-mentioned technical problem present in prior art, the present invention proposes one kind and realizes day using vector network instrument
RCS method of testing, reasonable in design when line is launched, and the deficiencies in the prior art is overcome, with good effect.
To achieve these goals, the present invention is adopted the following technical scheme that：
RCS method of testing when a kind of utilization vector network instrument realizes antenna transmitting, is realized using RCS measuring technologies and tested
Platform, it includes multiport vector network analyzer, the first auxiliary antenna, the second auxiliary antenna, test table, calibrating device,
One polarization turntable, the second polarization turntable, suction wave screen wind, the 3rd auxiliary antenna, the 3rd polarization turntable and tested antenna holder；
RCS method of testing, specifically includes following steps when described utilization vector network instrument realizes antenna transmitting：
Step 1：Suppression 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 being tested antenna
Support, low scattering purpose is realized by material type selecting and configuration design；
Step 2：Build test platform；
First port, second port and the 4th port of vector network analyzer are respectively through microwave cable and the second auxiliary day
Line, three auxiliary antennas of the first auxiliary antenna and the 3rd auxiliary antenna 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 the 3rd polarization turntable, wherein, the first auxiliary day
Two auxiliary antennas of line and the second auxiliary antenna are side by side close to placing, and dual-mode antenna spacing meets single station test request, and the 3rd is auxiliary
Antenna is helped to be placed according to dual station angle test request；3rd port of vector network analyzer is through microwave cable and tested antenna phase
Even, antenna fixed placement is tested on tested antenna holder；According to the different polarization scattering characteristics testing requirements of tested antenna, choosing
With the first polarization turntable, the second polarization turntable and the 3rd polarization turntable, various polarization RCS tests can be completed；
Step 3：Control and test；Specifically include following steps：
Step 3.1：Carry out the port configuration of vector network analyzer；
First port, the 3rd port are configured as output to port, second port, the 4th port are configured to receiving port,
The output frequency for setting first port is f1, and power output is P1, and the output frequency of the 3rd port is f2, and power output is P2,
Reception intermediate-frequency bandwidth is that the absolute value of B, f1 ≠ f2, and f1 and f2 difference is more than intermediate-frequency bandwidth B；
Step 3.2：Control test table drives tested antenna holder and tested antenna movement and is positioned at certain fixed pose
Angle；
Step 3.3：3rd port transmission signal of vector network analyzer is exported to tested antenna by tested antenna,
Tested Antenna Operation is in emission state；Internal signal separator separation of the first port transmission signal through vector network analyzer
Afterwards, a part delivers 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 delivers to vector net
The second port of network analyzer, vector is delivered to by the EM scattering signal for being tested antenna-reflected after the reception of the 3rd auxiliary antenna
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
Computing, obtains the amplitude and phase information of scattered signal under tested antenna attitude angle；
Step 3.5：Extract the vector data of the single 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, repeat step 3.3- steps
3.5, until completing to be tested the collection storage of antenna Dan Zhanyu EM scattering echo datas in the range of certain movement；
Step 4：Calibration calibration；Specifically include following steps：
Step 4.1：Parameter constant is kept, tested antenna is removed, backscatter echo vector data is completed according to step 3
Collection storage；
Step 4.2：Calibrating device is positioned on tested antenna holder, and its position and the placement location phase of tested antenna
Together, the collection for completing calibrating device scatter echo vector data according to step 3 is stored；
Step 4.3：Background, calibrating device, tested three groups of scatter echo data of antenna are respectively processed, calibration are completed fixed
Mark, draws the RCS values under tested antenna emission state.
Preferably, in step 1, material selection polystyrene；Profile selects the conical form at certain inclination angle.
Preferably, in step 2, single station test request be antenna spacing relative target distance 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 tests, wherein, H represents level, and V is represented
Vertically.
Preferably, in step 3.1, the absolute value of f1 and f2 difference is 1000 times of intermediate-frequency bandwidth B.
The advantageous effects that the present invention is brought：
1st, the present invention by the use of multiport vector network analyzer wherein signal source is another as tested antenna excitation all the way
Road signal source, as RCS test and excitations, is day under emission state so as to realize tested antenna RCS in transmit state test
Line RCS tests provide solution.
2nd, method of testing is practical：On the basis of traditional RCS checkout areas, only multiport network instrument need to be used instead, you can
Test is completed, without carrying out big change to original test equipment and place, method practicality is stronger.
3rd, 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 the closer tested antenna real works of test RCS
Result under state, test result reference value is stronger.
Brief description of the drawings
Fig. 1 is conventional aerial RCS method of testing schematic diagrames.
Fig. 2 is another conventional aerial RCS method of testing schematic diagrames.
Fig. 3 realizes platform schematic diagram for RCS measuring technologies under antenna emission state.
Wherein, 1- vector network analyzers；101- first ports 1；102- second ports；The ports of 103- the 3rd；104-
Four ports；The auxiliary antennas of 2- first；The auxiliary antennas of 3- second；4- is tested antenna；5- test tables；6- calibrating devices；The poles of 7- first
Change turntable；The polarization turntables of 8- second；9- inhales wave screen wind；The auxiliary antennas of 10- the 3rd；The polarization turntables of 11- the 3rd；12- is tested antenna
Support.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the present invention：
RCS method of testing when a kind of utilization vector network instrument realizes antenna transmitting, is realized using RCS measuring technologies and tested
Platform, as shown in figure 3, it includes multiport vector network analyzer 1, the first auxiliary antenna 2, the second auxiliary antenna 3, test turn
Platform 5, the polarization polarization of turntable 7, second of calibrating device 6, first turntable 8, suction wave screen wind 9, the 3rd auxiliary antenna the 10, the 3rd polarization turntable
11 and tested antenna holder 12；
RCS method of testing, specifically includes following steps when described utilization vector network instrument realizes antenna transmitting：
(1) test site AF panel is handled：For low RCS antenna measurements, place interference is influence measuring accuracy
Key factor, it is therefore necessary to carry out place interference analysis and handled with suppression, turntable stage body for test table 5, table top seam
The interference such as gap takes suction wave screen wind 9 to block measure, for being tested antenna holder 12, passes through material (polystyrene) type selecting and profile
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 the second auxiliary antenna 3,10 3 auxiliary antennas of the first auxiliary antenna 2 and the 3rd auxiliary antenna,
Wherein the first auxiliary antenna 2,3 two auxiliary antennas of the second auxiliary antenna are side by side close to placing, and antenna spacing meets single station angle and surveyed
Examination requires that the 3rd auxiliary antenna 10 is placed according to dual station angle test request.3rd port 103 of vector network analyzer 1 is through micro-
Ripple cable is connected with tested antenna 4, is tested the fixed placement of antenna 4 on tested antenna holder 12, and the can be matched depending on testing requirement
The one polarization polarization polarization turntable 11 of turntable 8 and the 3rd of turntable 7, second, auxiliary antenna is positioned on polarization turntable, can be completed
Various polarization RCS tests.
(3) system control and test：Start test program, the port that system software completes vector network analyzer 1 is matched somebody with somebody
Put, wherein first port 101, the 3rd port 103 are configured as output to, second port 102, the 4th port 104 are configured to receive, if
The output frequency of first port 101 is put for f1, power output P1, the output frequency of the 3rd port 103 is f2, power output 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 be positioned at certain
Fixed posture angle (orientation, pitching), the transmission signal of the 3rd port 103 of vector network analyzer 1 delivers to tested antenna 4, passes through
Tested antenna 4 is exported, and tested antenna 4 works in emission state, and the transmission signal of first port 101 is through vector network analyzer 1
After the separation of internal signal separator, a part delivers to its internal reference signal receiver, and another part is through the second auxiliary antenna 3
Radiated to tested antenna 4, through being tested antenna 4 reflect after scattered signal by the first auxiliary antenna 2 receive after deliver to the second end
Mouthfuls 102, EM scattering signal after being tested antenna 4 and reflecting by the 3rd auxiliary antenna 10 receive after deliver to the 4th port 104,
The internal reference receiving channel of vector network analyzer 1, second port 102, the 4th port 104 receive microwave signal, place simultaneously
Manage and extract amplitude, store after phase information, control software is extracted and stores the tested antenna attitude angle and places an order station, EM scattering
Signal phasor data, system software controls test table 5 drives tested antenna 4 to be positioned at next Fixed posture angle and (orientation, bowed
Face upward), test process above is repeated, according to the flow, tested antenna Dan Zhanyu dual station is finally completed in the range of certain movement and dissipates
Penetrate the collection storage of echo data.
(4) calibration calibration：Holding system device parameter is constant, removes tested antenna 4, is completed according to step (3) flow
The collection storage of backscatter echo vector data；Calibrating device 6 is positioned on tested antenna holder 12, and position and tested antenna
4 placement location is identical, and the collection storage of the scatter echo vector data of calibrating device 6 is completed according to step (3) flow.By background, school
Quasi- part, tested three groups of scatter echo data of antenna bring calibration software processing into, complete calibration calibration, draw tested antenna emitting shape
RCS values under state.
Certainly, described above is not 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 in the essential scope of the present invention, should also belong to the present invention's
Protection domain.
Claims (5)
- RCS method of testing when 1. a kind of utilization vector network instrument realizes antenna transmitting, it is characterised in that：Skill is tested using RCS Art realizes test platform, it include multiport vector network analyzer, the first auxiliary antenna, the second auxiliary antenna, test table, Calibrating device, the first polarization turntable, the second polarization turntable, inhale wave screen wind, the 3rd auxiliary antenna, the 3rd polarization turntable and by observation Line bracket；RCS method of testing, specifically includes following steps when described utilization vector network instrument realizes antenna transmitting：Step 1：Suppression 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 being tested antenna holder, Low scattering purpose is realized by material type selecting and configuration design；Step 2：Build 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 the 3rd auxiliary antenna are connected, the first auxiliary antenna, the second auxiliary antenna and the 3rd Auxiliary antenna is respectively placed on the first polarization turntable, the second polarization turntable and the 3rd 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, the 3rd auxiliary Antenna is placed according to dual station angle test request；3rd port of vector network analyzer is connected through microwave cable with tested antenna, Tested antenna fixed placement is on tested antenna holder；According to the different polarization scattering characteristics testing requirements of tested antenna, apolegamy First polarization turntable, the second polarization turntable and the 3rd polarization turntable, can complete various polarization RCS tests；Step 3：Control and test；Specifically include following steps：Step 3.1：Carry out the port configuration of vector network analyzer；First port, the 3rd port are configured as output to port, second port, the 4th port are configured to receiving port, is set The output frequency of first port is f1, and power output is P1, and the output frequency of the 3rd port is f2, and power output is P2, is received Intermediate-frequency bandwidth is that the absolute value of B, f1 ≠ f2, and f1 and f2 difference is more than intermediate-frequency bandwidth B；Step 3.2：Control test table drives tested antenna holder and tested antenna movement and is positioned at certain Fixed posture angle；Step 3.3：3rd port transmission signal of vector network analyzer is exported by tested antenna, is tested to tested antenna Antenna Operation is in emission state；After internal signal separator separation of the first port transmission signal through vector network analyzer, A part delivers to its internal reference signal receiver, and another part is through the second auxiliary antenna to tested aerial radiation；Step 3.4：Divide by being tested single station scattered signal of antenna-reflected and being received by the first auxiliary antenna and deliver to vector network The second port of analyzer, vector network is delivered to by the EM scattering signal for being tested antenna-reflected after the reception of the 3rd auxiliary antenna 4th port of analyzer, the internal reference receiving channel of vector network analyzer, second port, the 4th port receive interior simultaneously Portion's reference signal, single station scattered signal and EM scattering signal, computing is carried out 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：Extract the vector data of the single 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, repeat step 3.3- steps 3.5, Until completing to be tested the collection storage of antenna Dan Zhanyu EM scattering echo datas in the range of certain movement；Step 4：Calibration calibration；Specifically include following steps：Step 4.1：Parameter constant is kept, tested antenna is removed, the collection of backscatter echo vector data is completed according to step 3 Storage；Step 4.2：Calibrating device is positioned on tested antenna holder, and its position is identical with the placement location of tested antenna, root The collection storage of calibrating device scatter echo vector data is completed according to step 3；Step 4.3：Background, calibrating device, tested three groups of scatter echo data of antenna are respectively processed, calibration calibration is completed, Draw the RCS values under tested antenna emission state.
- The method of RCS tests when 2. utilization vector network instrument according to claim 1 realizes antenna transmitting, its feature exists In：In step 1, material selection polystyrene；Profile selects the conical form at certain inclination angle.
- The method of RCS tests when 3. utilization vector network instrument according to claim 1 realizes antenna transmitting, its feature exists In：In step 2, single station test request be antenna spacing relative target distance into 3 ° of subtended angle ＜；Dual station angle test request is Antenna spacing relative target distance institute is into subtended angle >=3 °.
- The method of RCS tests when 4. utilization vector network instrument according to claim 1 realizes antenna transmitting, its feature exists In：Various polarization RCS tests include HH, VV, HV, VH polarization RCS tests, wherein, H represents level, and V represents vertical.
- The method of RCS tests when 5. utilization vector network instrument according to claim 1 realizes antenna transmitting, its feature exists In：In step 3.1, the absolute value of f1 and f2 difference is 1000 times of intermediate-frequency bandwidth B.
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| CN107957575A (en) * | 2017-12-29 | 2018-04-24 | 北京航空航天大学 | A kind of two one are hung the method that support system realizes conical scanning |
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