CN109586811A - A kind of space flight microwave class product omnidirectional radiation Emission Pre-test system and method - Google Patents
A kind of space flight microwave class product omnidirectional radiation Emission Pre-test system and method Download PDFInfo
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- CN109586811A CN109586811A CN201811522287.9A CN201811522287A CN109586811A CN 109586811 A CN109586811 A CN 109586811A CN 201811522287 A CN201811522287 A CN 201811522287A CN 109586811 A CN109586811 A CN 109586811A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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Abstract
The present invention relates to a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system and methods, belong to microwave class properties of product the field of test technology, and the space flight microwave class product refers to that the frequency of the radiation-emitting electromagnetic wave of the product is 1-18GHz.Method of the invention has great reliability, conveniency, intuitive and engineering practicability in the test of space flight microwave class Electromagnetic Compatibility and case study, more particularly to adapt to the demand of following space flight microwave class product E MC quick predict examination and rectification, at present it is not yet found that similar predict method for testing, therefore this method has a vast market and the stronger market competitiveness in the EMC pretest of the following space flight microwave class product and rectification field.
Description
Technical field
The present invention relates to a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system and methods, belong to the production of microwave class
Product technical field of performance test, the space flight microwave class product refer to that the frequency of the radiation-emitting electromagnetic wave of the product is 1-
18GHz。
Background technique
With in Satellite Product synthesization and the fast development of integration degree and load cabin transponder channel it is continuous
Increase, product especially microwave class product in load cabin, it will the problem of facing more electromagnetic compatibility and protection aspect needs
Break through existing EMC testing experiment technology.Understand at present from open source information, to space flight in domestic and international electromagnetic compatibility (EMC) industry
The main army's of the use mark method and two dimensional field scan method of the test of microwave class product radiation-emitting, exist can not quickly, it is accurate,
The drawbacks of obtaining product radiation-emitting characteristic comprehensively.
Using army's mark method test space flight microwave class product radiation-emitting mainly according to MIL-STD-461G and
GJB151B-2013 etc..Test carried out in screened room, for different frequency range be respectively adopted 10kHz-30MHz bar antenna,
30MHz-200MHz biconical antenna, 200MHz-1GHz double-ridged horn antenna, 1GHz-18GHz double-ridged horn antenna.Test request
Its line-spacing test configurations boundary forward position 1m, antenna, which is above the ground level, is grounded plate 1.2m, it is ensured that any position of antenna is from screened room
Distance >=1m of wall surface, with a distance from ceiling >=0.5m, and ensure that product to be measured generates the direction direction of greatest irradiation transmitting
The forward position on test configurations boundary.
The test method there are the shortcomings that are as follows: 1) select test equipment it is more, test speed is slow, needs testing level every time
It polarizes with vertical two kinds, calibration and testing process are more complicated；2) only it is capable of measuring space flight microwave class product greatest irradiation launch party
To electromagnetic radiation situation, and greatest irradiation direction is manually estimated, the electromagnetism spoke of the product spherical surface total space to be measured can not be obtained
Situation is penetrated, particularly with space flight microwave class product, greatest irradiation direction of the launch meter more difficult to estimate, measurement error is larger, has limitation
Property；3) lack intuitive analytic function, be difficult that directly the electromagnetic leakage source of product is diagnosed and analyzed from test result.
Radiation-emitting using two dimensional field scan method test space flight microwave class product is sharp electric field probe or magnet field probe
The EMI test to product to be measured is realized by two-dimensional scanning mode.The test method there are the shortcomings that are as follows: 1) test use electricity
Field probe and magnet field probe working frequency range are usually 30MHz-3GHz, and frequency range is lower, are difficult to meet the frequency of space flight microwave class product
Rate requirement；2) the radiation-emitting information of half space, can not equally obtain product ball to be measured before two dimensional field scan method can only obtain
The radiation-emitting situation of the face total space, and precision is poor in wide-angle measurement；3) two dimensional field scan method uses mechanical turntable,
Sweep time is longer, and testing efficiency is low.
Both the above conventional method can not fast, accurately and comprehensively obtain the radiation-emitting characteristic of space flight microwave class product,
And electromagnetic leakage source can not intuitively be positioned using army's mark method.
Summary of the invention
Technology of the invention solves the problems, such as: overcome the deficiencies in the prior art, proposes a kind of space flight microwave class product omnidirectional
Radiation-emitting pretest system and method, this method are real in order to overcome the shortcomings of traditional army's mark method and two dimensional field scan method
Existing space flight microwave class product radiation-emitting it is accurate, examination is effectively predicted, for space flight microwave class product frequency, power etc.
Feature, the correlation theory of relative theory and standard requirements and spherical surface near-field test based on electromagnetic compatibility test, using ultra-wide
With the technologies such as near field probes, spherical surface near-field test overcome conventional test methodologies test frequency range, precision and in terms of
Deficiency can emit the omnidirectional radiation of space flight microwave class product and carry out quick, Accurate Prediction examination and analysis.
The technical solution of the invention is as follows:
A kind of space flight microwave class product omnidirectional radiation Emission Pre-test system, which includes pedestal, support column, arch
Ring, testboard, semi-anechoic chamber, linear impedance stabilization network (LISN), probe switching control module, servo motor, power supply mould
Block receives amplifying unit, spectrum analyzer and data processing module；
The inner surface of the arch ring is evenly equipped with several near field probes, the π r/ of number N >=16 λ of near field probes.
The inner surface of the semi-anechoic chamber is equipped with absorbing material；
The outer surface surface of the support column is equipped with absorbing material；
The outer surface of the arch ring is equipped with absorbing material；
The outer surface of the pedestal is equipped with absorbing material；
It is dark that pedestal, support column, arch ring, testboard and the linear impedance stabilization network (LISN) is installed in half electric wave
It is indoor；
The pedestal is mounted on the bottom surface of semi-anechoic chamber, and arch ring is fixedly mounted on pedestal, and support column is mounted on
The bottom of arch ring inner surface, testboard are fixedly mounted on the top of support column, and test product is fixedly mounted on the top of testboard；
The outer surface of the arch ring is not less than 80cm at a distance from the absorbing material surface of semi-anechoic chamber；
Power module provides power supply to test product by linear impedance stabilization network (LISN)；
Probe switching control module is used to control the switching between the near field probes of the inner surface installation of arch ring；
Servo motor is for controlling the rotation of support column in the circumferential, i.e., support column can be around under the action of servo motor
The central axis of support column is rotated；
Near field probes are used to test the level for the electromagnetic wave that test product is issued, and the electricity for the electromagnetic wave that test is obtained
It is flat to be sent to reception amplifying unit, it receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to frequency spectrum point
Analyzer, output spectrum data are to data after spectrum analyzer carries out spectrum analysis to the signal of the amplified electromagnetic wave received
Processing module, data processing module obtain test product radiation-emitting electricity after carrying out space field transformation to the frequency spectrum data received
The spectral characteristic of magnetic wave.
Method when carrying out mechanically calibrated to above-mentioned test macro are as follows: calibration antenna is placed on the support columns, is utilized
The center of each near field probes of laser testing instrument face is tested each near field probes at a distance from calibration antenna, is also tested
The angle of each near field probes, the range error made are less than λ/50, and angular error is less than λ/50r, and wherein λ is maximum measurement
The corresponding electromagnetic wavelength of frequency, r are distance of the near field probes apart from origin (center of circle that origin is arch ring)；
Method when electric calibration is carried out to above-mentioned test macro are as follows: using super-wide band high-gain antenna as calibration day
Line places calibration antenna on the support columns, and make to calibrate the greatest irradiation direction of antenna along arch ring radial direction successively just
Each near field probes (are placed into calibration antenna by the center point of arch ring, makes the greatest irradiation direction inverse time of angle calibration antenna
Needle or clockwise one circle of scanning), it is calibrated using collected field strength and phase information as calibration data.
A kind of the step of space flight microwave class product omnidirectional radiation Emission Pre-test method, this method includes:
(1) voltage module provides power supply to test product by linear impedance stabilization network (LISN)；
(2) level for the electromagnetic wave that near field probes test test product is issued, and the electricity for the electromagnetic wave that test is obtained
It is flat to be sent to reception amplifying unit；
(3) it receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer, frequency spectrum
Output spectrum data are to data processing module after analyzer carries out spectrum analysis to the signal of the amplified electromagnetic wave received；
(4) near field probes are switched by probe switching control module, repeating step (2)-(3) makes all test to tested
The level for the electromagnetic wave that product is issued；
(5) support column is made to rotate set angle, i.e. effect of the support column in servo motor in the circumferential by servo motor
Under around support column central axis rotation；
(6) level for the electromagnetic wave that the test product near field probes testing procedure (4) after rotation is issued, and will test
The level of obtained electromagnetic wave, which is sent to, receives amplifying unit 10；
(7) it receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer, frequency spectrum
Output spectrum data are to data processing module after analyzer carries out spectrum analysis to the signal of the amplified electromagnetic wave received；
(8) near field probes are switched by probe switching control module, repeating step (6)-(7) makes all test to tested
The level for the electromagnetic wave that product is issued；
(9) step (5)-(8) are repeated；
(10) data processing module obtains test product spoke after carrying out space field transformation to all frequency spectrum datas received
Penetrate the spectral characteristic of transmitting electromagnetic wave.
In the step (2), the electromagnetic wave that test product different directions are issued is tested by different near field probes
Level；
In the step (3), spectrum analyzer is set as the test frequency range of test product；
In the step (4), the electromagnetic wave that test product different directions are issued is tested by different near field probes
Level；
In the step (9), when repeating step (5), the setting that rotates support column in the circumferential by servo motor
Angle can be the same or different；
In the step (9), when repeating step (5), preferably rotate support column in the circumferential by servo motor
Direction is identical, and the angle summation rotated is 180 °.
Near field probes use 1-18GHz vertical bipolar Vivaldi antenna form, preferred size be 12cm × 12cm ×
33cm；
It is connected between probe switching control module and near field probes by radio frequency coaxial-cable.
Beneficial effect
(1) space flight microwave class product omnidirectional radiation transmitting quick predict method for testing proposed by the present invention is dark in half electric wave of EMC
System configuration, core component of the near-field test probe as near field Multi probe EMC test equipment, tool are carried out in indoor and control room
There is dual polarization ultra wide band characteristic, frequency coverage 1-18GHz (space flight microwave class product frequency range) can accurately measure product two to be measured
Tangential radiation-emitting in kind vertical polarization directions.N (N >=16) a near-field test probe is evenly distributed on by certain angle interval
In arch ring.Support column is similarly positioned on the inside of arch ring, and lower end passes through arch ring and connect with pedestal, and upper end is connect with testboard.Testboard
Place product to be measured, it is ensured that product to be measured is in the center of arch ring.Arch ring is fixed by pedestal.On the inside of arch ring, prop up
Dagger, pedestal are equipped with absorbing material, and absorbing material integrally wraps up it, and test probe is stretched out from absorbing material tapping
And it is directed toward the center of arch ring.
(2) in order to reduce the electromagnetic interference of test equipment itself, remaining equipment is configured in control room；Power module is logical
It crosses LISN to be powered product to be measured, LISN can provide stable wideband impedance match for test macro.It is single to receive amplification
Member is responsible for amplifying the field information that near field probes measure.Spectrum analyzer is responsible for the acquisition and spectrum analysis of test data；
(3) mechanically calibrated: mechanically calibrated purpose is to ensure the position of each near-field test probe using laser testing instrument
It is identical and angularly put (distance and angle are in effective error scope) to set the distance apart from product to be measured.Utilize laser testing
The each test center probe position of instrument face, successively calibrates the distance of the angle and distance product of each probe, it is ensured that
Range error is less than λ/50, and angular error is less than λ/50r, and wherein λ is the corresponding electromagnetic wavelength of maximum measurement frequency, and r is close
Distance of the Field probe apart from origin.
(4) electric calibration: the purpose of electric calibration be to make each test pop one's head in reception/transmitting electric field amplitude having the same and
Phase (amplitude and phase are in effective error scope).The specific method is as follows: using super-wide band high-gain antenna as calibration day
Line will calibrate the radial direction successively each spy of face of the greatest irradiation direction of antenna globally near field Multi probe test macro
Head is calibrated using collected field strength and phase information as calibration data.
(5) test method: will calibration antenna be changed to product to be measured, by power module by LISN connect product to be measured into
Row power supply；Reception amplifier and frequency spectrograph are opened, and sets required frequency range for frequency spectrograph.It is acquired using near field probes special
Determine two tangential fields on spherical surface in vertical direction；It is treated using probe switch unit and control module switching near field probes realization
It surveys product pitching to scan to (or orientation), until probe switching finishes；Product Level to be measured is revolved using Servocontrol device
Turn certain angle, repeat, realizes to product orientation to be measured (or pitching to) to scanning, until Product Level to be measured rotation 180
Degree, product test to be measured finish.Finally the Near-field Data collected is saved into computer.
(6) it is required according to radiation emission test correlation distance in the EMC standard such as MIL-STD-461G and GJB151B-2013,
Space field transformation is carried out to the radiation field of product, the radiation field of the product spherical surface total space to be measured can be obtained.Space field transformation master
It to include two parts: 1) probe compensation, that is, the directivity information for measuring near field probes calibrates probe.Due near field probes
It is closer with directionality, and with product to be measured, therefore near field probes collected field on spherical surface is added near probe
Weight average field, in order to ensure the precision of space field transformation, it is necessary to carry out probe compensation；2) space field transformation, i.e., in probe compensation
On the basis of, according to the scattering matrix theory of Spherical wave expansion theory and antenna, space is carried out to the test result of product to be measured
Field transformation.
(7) after the completion of after the field transformation of space, choose radiation-emitting maximum direction on result and MIL-STD-461G and
Curve (including in EMC Data Post module) compares in the standards such as GJB151B-2013, and whether analysis EMC test data
It is exceeded.If there is the exceeded situation of radiation-emitting, further space field transformation can be done, the source of leaks of radiation-emitting is carried out
Positioning and diagnosis.
(8) the invention proposes a kind of space flight microwave class product omnidirectional radiations to emit quick predict method for testing, compared to tradition
Test method, this method can more quickly, comprehensively, be accurately realized the pretest of space flight microwave class product E MC performance, significantly
Improve the development efficiency of space flight microwave class product.
(9) present invention introduces spherical surface near-field test technologies, propose a kind of fast for space flight microwave class product radiation-emitting
Speed, the new method accurately tested.It can only manually estimate that greatest irradiation direction carries out test and two dimensional field is swept compared to army's mark method
The radiation-emitting situation of half space before the method for retouching can only be surveyed, this method can be to space flight microwave class product 1-18GHz full frequency band
Spherical surface total space radiation-emitting carries out quick, accurate test, and it is maximum to avoid manually estimation for the accurate greatest irradiation for assessing product
The human error and limitation that radiation direction measures, the precision of test and comprehensive greatly improve；
(10) the present invention is based on spherical surface Multi probe near-field test methods, are scanned using swift electron instead of traditional test side
Manual test and mechanical scanning in method, test product only need one-dimensional half revolution to can be obtained the electromagnetism spoke of test product omnidirectional
Situation is penetrated, testing efficiency and measuring accuracy greatly improve；
(11) present invention uses 1-18GHz miniature ultra wide band vertical bipolar near field probes, compares conventional test methodologies,
With following technological break-through: the probe can acquire orthogonal two tangential fields on specific spherical surface simultaneously, avoid tradition
Every product to be measured is both needed to calibrate and measure the complicated processes of two polarization directions simultaneously in radiation emission test, it is only necessary to pass through one
Test process can be completed in secondary calibration and measurement, enormously simplifies testing process；Compared to two dimensional field scan method test frequency range compared with
The limitation of low (usually 30MHz-3GHz), this method use the ultra wideband dual polarization near field probes of Vivaldi form, test
Band spreading can satisfy the testing requirement of space flight microwave class product radiation-emitting to 1-18GHz；
(12) present invention is utilizing space field transformation algorithm, compared to traditional army's mark method and two dimensional field scan method, more just
The intuitive of product electromagnetic leakage source is positioned and assessed in intuitively passing through the realization of space field transformation.
At present in the debugging stage of product, method and two dimensional field are marked using armies such as MIL-STD-461G and GJB151B-2013
The case where scan method progress EMC test and case study, is still generally existing, and testing efficiency is low, human error and test error
It is higher.Space flight microwave class product omnidirectional radiation transmitting quick predict method for testing proposed by the present invention and conventional test methodologies phase
Than following clear superiority and benefit can be brought.Measuring accuracy greatly improves, and avoids and manually estimates maximum spoke in conventional method
Penetrate the human error measured；Testing efficiency significantly improves, using electron scanning instead of the manual test in conventional method
And mechanical scanning；It is comprehensive strong to test information, product omnidirectional radiation transmitting letter more fully than conventional test methodologies can be obtained
Breath；Testing process greatly simplifies, it is only necessary to which test process can be completed in primary calibration and measurement, avoids every production in conventional method
Product need to calibrate and measure the complicated processes of two polarization directions；Test frequency range is widened significantly, and test frequency range can cover 1-
The working frequency range of 18GHz space flight microwave class product；Test result intuitively greatly improves, which can be realized spatial field change
It changes, convenient for intuitively being positioned to space flight microwave class product electromagnetic leakage source.
(13) method of the invention has in the test of space flight microwave class Electromagnetic Compatibility and case study and greatly may be used
By property, conveniency, intuitive and engineering practicability, more particularly to adapt to the following space flight microwave class product E MC quick predict examination and
The demand of rectification, at present it is not yet found that similar predict method for testing, therefore this method is pre- in the EMC of the following space flight microwave class product
It is had a vast market and the stronger market competitiveness in test and rectification field.
Detailed description of the invention
Fig. 1 is system composition schematic diagram of the invention.
Specific embodiment
The present invention is based on electromagnetic compatibility test correlation theory and methods to propose one in conjunction with technologies such as spherical surface near-field tests
Kind carries out the new method of quick Accurate Prediction examination for space flight microwave class product radiation-emitting.Main implementation process is as follows:
1) the actual test demand of space flight microwave class product radiation-emitting is studied, space flight microwave class product mainly includes receiving
The single machines such as machine, frequency converter, travelling-wave amplifier, solid-state amplifier, filter, radiation-emitting frequency are concentrated mainly on 1-18GHz,
By making thorough investigation and study to space flight microwave class product radiation emission test demand, determines near-field test probe frequency, bears power
The configuration needs of related software and hardware in equal developments demand and test method.
2) it is based on Vivaldi antenna citation form, in conjunction with the ultra wide bands such as antenna loading, Miniaturization Design technology, designs 1-
18GHz miniature ultra wide band vertical bipolar antenna is as near-field test probe, design requirement: frequency: 1-18GHz；Standing wave≤
2；Gain >=2dB；Isolation >=20dB；Size≤12cm × 12cm × 33cm.
3) it is visited according to electromagnetic compatibility test relative theory and test method requirement, research based on ultra wideband dual polarization near field
Head, high speed electronic switch, control module, servo-system, spectrum analyzer, linear impedance stabilization network (LISN) etc. establish EMC
Spherical surface near field test system meets the needs of class product radiation-emitting total space pretest of space flight microwave and spectrum analysis.
4) according to the actual demand of space flight microwave class product radiation emission test, test software is write.Include: a) data adopt
Collection software module is write: b) radiation-emitting related limit value is led in the EMC standard such as MIL-STD-461G and GJB151B-2013
Enter；C) corresponding Near-far fields transfer algorithm being developed according to army's mark test request, space change is carried out to collected product radiating near field
It changes；D) test result determines and analysis module is write, can be realized by after test or spatial alternation result and army's mark compare,
And accurately estimate the radiation-emitting performance of product.
5) in order to realize the application and popularization of the prediction method for testing, according to space flight microwave class product radiation emission test demand
With test request in the EMC standard such as MIL-STD-461G and GJB151B-2013, dependence test specification is write.
Embodiment
As shown in Figure 1, a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system, which includes pedestal
1, support column 2, arch ring 3, testboard 4, semi-anechoic chamber 5, linear impedance stabilization network (LISN) 6, probe switching control module
7, servo motor 8, power module 9, reception amplifying unit 10, spectrum analyzer 11 and data processing module 12；
The inner surface of the arch ring 3 is evenly equipped with 16 near field probes；
The inner surface of the semi-anechoic chamber 5 is equipped with absorbing material；
The outer surface surface of the support column 2 is equipped with absorbing material；
The outer surface of the arch ring 3 is equipped with absorbing material；
The outer surface of the pedestal 1 is equipped with absorbing material；
Pedestal 1, support column 2, arch ring 3, testboard 4 and the linear impedance stabilization network (LISN) 6 is installed in half
In anechoic chamber, 5；
The pedestal 1 is mounted on the bottom surface of semi-anechoic chamber 5, and arch ring 3 is fixedly mounted on pedestal 1, and support column 2 is pacified
Mounted in the bottom of 3 inner surface of arch ring, testboard 4 is fixedly mounted on the top of support column 3, and test product is fixedly mounted on testboard
4 top；
The outer surface of the arch ring 3 is not less than 80cm at a distance from the absorbing material surface of semi-anechoic chamber 5；
Power module 9 provides power supply to test product by linear impedance stabilization network (LISN) 6；
Probe switching control module 7 is used to control the switching between the near field probes of the inner surface installation of arch ring 3；
Servo motor 8 is for controlling the rotation of support column 2 in the circumferential, i.e. energy under the action of servo motor 8 of support column 2
Enough central axises around support column 2 are rotated；
Near field probes are used to test the level for the electromagnetic wave that test product is issued, and the electricity for the electromagnetic wave that test is obtained
Flat be sent to receives amplifying unit 10, receives after amplifying unit 10 amplifies the level of the electromagnetic wave received and is sent to frequency
Spectrum analysis instrument 11, spectrum analyzer 11 is to output spectrum number after the signal progress spectrum analysis of the amplified electromagnetic wave received
According to data processing module 12, data processing module 12 obtains tested production after carrying out space field transformation to the frequency spectrum data received
The spectral characteristic of product radiation-emitting electromagnetic wave.
Method when carrying out mechanically calibrated to above-mentioned test macro are as follows: calibration antenna is placed on support column 2, is utilized
The center of each near field probes of laser testing instrument face is tested each near field probes at a distance from calibration antenna, is also tested
The angle of each near field probes, the range error made are less than λ/50, and angular error is less than λ/50r, and wherein λ is maximum measurement
The corresponding electromagnetic wavelength of frequency, r are distance of the near field probes apart from origin (center of circle that origin is arch ring 3)；
Method when electric calibration is carried out to above-mentioned test macro are as follows: using super-wide band high-gain antenna as calibration day
Line, will calibration antenna be placed on support column 2, and make calibrate antenna greatest irradiation direction along arch ring 3 radial direction successively
Calibration antenna (is placed into the center point of arch ring 3, keeps the greatest irradiation direction of angle calibration antenna inverse by each near field probes of face
Hour hands or clockwise one circle of scanning), it is calibrated using collected field strength and phase information as calibration data.
A kind of the step of space flight microwave class product omnidirectional radiation Emission Pre-test method, this method includes:
(1) voltage module 9 provides power supply to test product by linear impedance stabilization network (LISN) 6；
(2) level for the electromagnetic wave that near field probes test test product is issued, and the electricity for the electromagnetic wave that test is obtained
Flat be sent to receives amplifying unit 10；
(3) it receives after amplifying unit 10 amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer 11,
Spectrum analyzer 11 to the signal of the amplified electromagnetic wave received carry out after spectrum analysis output spectrum data to data at
Manage module 12；
(4) near field probes are switched by probe switching control module 7, repeats step (2)-(3) totally 15 times；
(5) support column 2 is made to rotate 5 ° in the circumferential by servo motor 8, i.e., support column 2 is under the action of servo motor 8
Around the central axis rotation of support column 2；
(6) level for the electromagnetic wave that the test product near field probes testing procedure (4) after rotation is issued, and will test
The level of obtained electromagnetic wave, which is sent to, receives amplifying unit 10；
(7) it receives after amplifying unit 10 amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer 11,
Spectrum analyzer 11 to the signal of the amplified electromagnetic wave received carry out after spectrum analysis output spectrum data to data at
Manage module 12；
(8) near field probes are switched by probe switching control module 7, repeating step (6)-(7) makes all tests to quilt
Survey the level for the electromagnetic wave that product is issued；
(9) step (5)-(8), 180 ° of the angle summation for rotating support column 2 in the circumferential are repeated；
(10) data processing module 12 obtains after carrying out space field transformation to all frequency spectrum datas received apart from the quilt
Survey the near field distribution at product 1m.
The present invention compared with conventional radiation transmitting test method, measuring accuracy, testing efficiency, test it is comprehensive, straight
It improves a lot in terms of the property seen and engineering practicability, it is proposed that try and rectify and improve in the following space flight microwave class product E MC quick predict
Middle application.
Claims (10)
1. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system, it is characterised in that: the test macro include pedestal,
Support column, arch ring, testboard, semi-anechoic chamber, linear impedance stabilization network, probe switching control module, servo motor, power supply
Module receives amplifying unit, spectrum analyzer and data processing module；
The inner surface of the arch ring is equipped near field probes；
Pedestal, support column, arch ring, testboard and the linear impedance stabilization network is installed in semi-anechoic chamber；
The pedestal is mounted on the bottom surface of semi-anechoic chamber, and arch ring is fixedly mounted on pedestal, and support column is mounted on arch ring
The bottom of inner surface, testboard are fixedly mounted on the top of support column, and test product is fixedly mounted on the top of testboard；
Power module provides power supply to test product by linear impedance stabilization network；
Probe switching control module is used to control the switching between the near field probes of the inner surface installation of arch ring；
Servo motor is for controlling the rotation of support column in the circumferential；
Near field probes are used to test the level for the electromagnetic wave that test product is issued, and the level for the electromagnetic wave that test is obtained is sent out
Reception amplifying unit is given, receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to spectrum analysis
Instrument, spectrum analyzer to the signal of the amplified electromagnetic wave received carry out after spectrum analysis output spectrum data to data at
Module is managed, data processing module obtains test product radiation-emitting electromagnetism after carrying out space field transformation to the frequency spectrum data received
The spectral characteristic of wave.
2. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 1, it is characterised in that:
The inner surface of the arch ring is evenly equipped with several near field probes, the π r/ of number N >=16 λ of uniformly distributed near field probes.
3. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 2, it is characterised in that:
N=16.
4. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 1, it is characterised in that:
The inner surface of the semi-anechoic chamber is equipped with absorbing material；
The outer surface surface of the support column is equipped with absorbing material；
The outer surface of the arch ring is equipped with absorbing material；
The outer surface of the pedestal is equipped with absorbing material.
5. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 1, it is characterised in that:
The outer surface of the arch ring is not less than 80cm. at a distance from the absorbing material surface of semi-anechoic chamber
6. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 1, it is characterised in that:
Method when carrying out mechanically calibrated to above-mentioned test macro are as follows: calibration antenna is placed on the support columns, laser testing is utilized
The center of each near field probes of instrument face tests each near field probes at a distance from calibration antenna, also tests each near field
The angle of probe, the range error made are less than λ/50, and angular error is less than λ/50r, and wherein λ is that maximum measurement frequency is corresponding
Electromagnetic wavelength, r be distance of the near field probes apart from origin.
7. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test system according to claim 1, it is characterised in that:
Method when electric calibration is carried out to above-mentioned test macro are as follows: using super-wide band high-gain antenna as calibration antenna, will calibrate
Antenna is placed on the support columns, and makes radial direction successively face each near field of the greatest irradiation direction along arch ring for calibrating antenna
Probe, is calibrated using collected field strength and phase information as calibration data.
8. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test method, it is characterised in that the step of this method includes:
(1) voltage module provides power supply to test product by linear impedance stabilization network；
(2) level of the electromagnetic wave issued using one of near field probes test test product, and the electricity that test is obtained
The level of magnetic wave is sent to reception amplifying unit；
(3) it receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer, spectrum analysis
Output spectrum data are to data processing module after instrument carries out spectrum analysis to the signal of the amplified electromagnetic wave received；
(4) near field probes are switched by probe switching control module, repeating step (2)-(3) makes all tests to test product
The level of the electromagnetic wave issued；
(5) so that support column is rotated set angle in the circumferential by servo motor, i.e., support column under the action of servo motor around
The central axis rotation of support column；
(6) level of the electromagnetic wave issued using the test product after rotation in one of near field probes testing procedure (4),
And the level for the electromagnetic wave that test obtains is sent to reception amplifying unit；
(7) it receives after amplifying unit amplifies the level of the electromagnetic wave received and is sent to spectrum analyzer, spectrum analysis
Output spectrum data are to data processing module after instrument carries out spectrum analysis to the signal of the amplified electromagnetic wave received；
(8) near field probes are switched by probe switching control module, repeating step (6)-(7) makes all tests to test product
The level of the electromagnetic wave issued；
(9) step (5)-(8) are repeated；
(10) data processing module obtains test product radiation hair after carrying out space field transformation to all frequency spectrum datas received
The spectral characteristic of radio magnetic wave.
9. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test method according to claim 8, it is characterised in that:
In the step (9), when repeating step (5), the set angle for rotating support column in the circumferential by servo motor and side
And, and the angle summation rotated is 180 ° to all the same.
10. a kind of space flight microwave class product omnidirectional radiation Emission Pre-test method according to claim 8, feature exist
In: near field probes use 1-18GHz vertical bipolar Vivaldi antenna form, having a size of 12cm × 12cm × 33cm；Probe is cut
It changes between control module and near field probes and is connected by radio frequency coaxial-cable.
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