CN104660351B - A kind of new method of test satellite antenna pattern - Google Patents
A kind of new method of test satellite antenna pattern Download PDFInfo
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- CN104660351B CN104660351B CN201410830481.9A CN201410830481A CN104660351B CN 104660351 B CN104660351 B CN 104660351B CN 201410830481 A CN201410830481 A CN 201410830481A CN 104660351 B CN104660351 B CN 104660351B
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Abstract
The present invention relates to a kind of new method of test satellite antenna pattern, the method is realized by satellite antenna test system, the test system includes testing station, by survey station and test satellite, wherein described testing station includes calculation machine, audiofrequency spectrometer and test antenna, tested antenna is included by survey station, signal generating module, the method adopts audiofrequency spectrometer gathered data, and the test data is processed in calculation machine, statistics, can realize that later data is processed, test result is obtained according to statistical method, and when calculation machine carries out data analysiss, improper data in test data can be removed, avoid impact of the accidental mistake to test result；The method test respectively obtain near lobe directional diagram and nearby lobe contrapolarization directional diagram, and obtain polarization isolation using direction figure statistics, the computational accuracy of polarization isolation can be improved.
Description
Technical field
The present invention relates to satellite antenna field tests, more particularly to a kind of new method of test satellite antenna pattern, fit
For the antenna net entering validation test of C, Ku, DBS satellite communication frequency range.
Background technology
As satellite communication system is an open systemss, interference is highly susceptible to；Extraneous signal in any frequency range
Satellite system can be entered, satellite regular traffic is affected.Therefore, satellite antenna dispatches from the factory or formally enters satellite communication network (letter
Claim " networking ") launched or received signal before, it is necessary to through Antenna Pattern Measuring Test.Test result meets Specifications
Can dispatch from the factory or network.
Technical specification is generally comprised：Antenna gain, the isolation of main lobe/the first secondary lobe, polarization isolation, gain curve shape.
Antenna gain determines the transmitting/receiving signal ability of antenna；Antenna sidelobe performance has decided on whether to reveal side-lobe signal
It is up to the downstream signal for closing on satellite or whether have received neighbouring satellite；Whether cross polarization isolation is then investigated signal
It is leaked to contrapolarization to be up to satellite or have received the signal of contrapolarization on satellite；Gain curve shape then judges whether to meet
The gain envelope line of ITU suggestions.Technical specification is undesirable not only to affect other business, also can the business of oneself be caused to dislike
Bad impact.
Satellite antenna pattern test typically directly records (manual mode) using audiofrequency spectrometer, and directional diagram curve is saved as
Derive after picture file and print.Domestic overwhelming majority antenna manufacturer adopts in this way, and advantage is convenient, fast, is lacked
Point is the absence of later data process, judges whether some technical parameters meet index request and have any problem.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of new side of test satellite antenna pattern
Method, the method adopt audiofrequency spectrometer gathered data, and the test data in calculation machine are carried out processing, is counted, Ke Yishi
Existing later data is processed, and obtains test result according to statistical method, and when calculation machine carries out data analysiss, can be right
Improper data in test data is removed, it is to avoid impact of the accidental mistake to test result；The method is tested respectively
Lobe directional diagram and nearby lobe contrapolarization directional diagram near obtaining, and polarization isolation, Ke Yiti are obtained using direction figure statistics
The computational accuracy of high polarization isolation.
What the above-mentioned purpose of the present invention was mainly achieved by following technical solution：
A kind of new method of test satellite antenna pattern, is realized by satellite antenna test system, the satellite antenna
Test system include testing station, by survey station and test satellite, wherein the testing station includes calculation machine, audiofrequency spectrometer and test
Antenna, is included tested antenna, signal generating module by survey station, and concrete methods of realizing step is as follows：
(1), the working frequency range and polarization mode according to test satellite, the setting test in the signal generating module by survey station
The mid frequency and polarization mode of signal, and send the test signal to tested antenna, tested antenna is by the test for receiving
Signal is sent to test satellite by up-link；Test passing of satelline downlink forwards the test signal to test days
Line, test antenna send the test signal to audiofrequency spectrometer, and the level data of test signal is sent to measuring and calculation by audiofrequency spectrometer
Machine, wherein, the positive polarization signal output for testing antenna is connected with audiofrequency spectrometer；
(2) azimuth and the angle of pitch of tested antenna, are adjusted so that the main lobe alignment test satellite of the tested antenna,
And record azimuth and the angle of pitch of the tested antenna after adjustment；
(3) polarisation angles of tested antenna, are adjusted so that main polarization signal and antipole that testing station intermediate frequency spectrometer is received
The power difference for changing signal is maximum；Implement process as follows：
(3a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record audiofrequency spectrometer output
The frequency spectrum data of positive polarization signal；
(3b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna is adjusted, directly
The power difference of the positive polarization signal recorded with step (3a) to the power of the contrapolarization signal is maximum, then fix tested antenna
Polarizing angle；
(4), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, and by tested antenna in pitching and orientation
According to lobe angle [alpha] uniform rotation near setting in plane, in tested antenna rotation process, the audiofrequency spectrometer of testing station will be tested
The level data for obtaining is sent to calculation machine, and calculation machine is drawn near antenna respectively according to the test level data
The pitch orientation figure of lobe near the azimuth pattern and antenna of lobe；
(5), the remote secondary lobe angle beta uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, tested
In antenna rotation process, the level data that test is obtained is sent to calculation machine, calculation machine by the audiofrequency spectrometer of testing station
Draw the pitch orientation figure of the azimuth pattern and the remote secondary lobe of antenna of the remote secondary lobe of antenna according to the test level data respectively；Its
In, β>α；
(6), the polarisation angles of tested antenna are rotated by 90 °, and are finely adjusted in the range of the polarisation angles ± γ,
So that the power difference of the main polarization signal that receives of testing station intermediate frequency spectrometer and contrapolarization signal is maximum, wherein, γ≤10 °；
Concrete methods of realizing is as follows：
(6a), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the contrapolarization of audiofrequency spectrometer output is recorded
The frequency spectrum data of signal；
(6b), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, is entered in the range of polarisation angles ± γ
Row adjustment, it is until the power difference maximum of the contrapolarization signal that power and the step (6a) of the positive polarization signal are recorded, then solid
The polarizing angle of fixed tested antenna；
(7), the nearby lobe angle [alpha] uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, tested
In antenna rotation process, the level data that test is obtained is sent to calculation machine, calculation machine by the audiofrequency spectrometer of testing station
The contrapolarization of lobe near the contrapolarization azimuth pattern and antenna of lobe near antenna is drawn respectively according to the test level data
Pitch orientation figure；
(8) polarisation angles for, adjusting tested antenna are rotated by 90 °, and carry out in the range of the polarisation angles ± γ micro-
Adjust so that the main polarization signal and the power difference of contrapolarization signal that testing station intermediate frequency spectrometer is received is maximum, concrete adjustment side
Method is as follows：
(8a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record audiofrequency spectrometer output
The frequency spectrum data of positive polarization signal；
(8b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna is adjusted, directly
The power difference of the positive polarization signal recorded with step (8a) to the power of the contrapolarization signal is maximum, then fix tested antenna
Polarizing angle.
(8c), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer.
(9), the pattern data that calculation machine is obtained according to step (4), (5) and (7) test, statistical computation is by observation
The performance data of line, the performance data include antenna transmitting gain, the isolation of main lobe/the first secondary lobe, polarization isolation.
A kind of new method of above-mentioned test satellite antenna pattern, in step (4), the nearby lobe angle of the setting
α is set according to the working frequency range of tested antenna, wherein, α=3 ° are set in C frequency ranges, set α=1.5 ° in Ku frequency ranges, in DBS frequencies
Section setting α=1.5 °.
A kind of new method of above-mentioned test satellite antenna pattern, in step (4), test obtains lobe near antenna
The detailed process of azimuth pattern is as follows：
(4a), by tested antenna in the aximuthpiston rotated counterclockwise by angle α；
(4b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the azimuth pattern for obtaining lobe near antenna respectively；
(4c), by tested antenna in the aximuthpiston rotate counterclockwise set angle α, that is, return initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (4), test obtains lobe near antenna
The detailed process of pitch orientation figure is as follows：
(4d), by tested antenna in pitch plane to lower anglec of rotation α；
(4e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining lobe near antenna is drawn respectively；
(4f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (5), the remote secondary lobe angle beta according to
The working frequency range setting of tested antenna, wherein, β=15 ° are set in C frequency ranges, set β=8 ° in Ku frequency ranges, set in DBS frequency ranges
β=8 °.
A kind of new method of above-mentioned test satellite antenna pattern, in step (5), test obtains the remote secondary lobe of antenna
The detailed process of azimuth pattern is as follows：
(5a) tested antenna is rotated counterclockwise into angle beta in aximuthpiston,；
(5b), tested antenna 2 β of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the azimuth pattern for obtaining the remote secondary lobe of antenna respectively；
(5c) tested antenna is rotated counterclockwise into set angle β in aximuthpiston, that is, returns initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (5), test obtains the remote secondary lobe of antenna
The detailed process of pitch orientation figure is as follows：
(5d), by tested antenna in the pitch plane rotational angle β downwards；
(5e), tested antenna is at the uniform velocity rotated up 2 β of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining the remote secondary lobe of antenna is drawn respectively；
(5f), by tested antenna in the pitch plane rotational angle β downwards, that is, return initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (7), test obtains lobe near antenna
The detailed process of contrapolarization azimuth pattern is as follows：
(7a) tested antenna is rotated counterclockwise into angle [alpha] in aximuthpiston,；
(7b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the contrapolarization azimuth pattern for obtaining lobe near antenna respectively；
(7c) tested antenna is rotated counterclockwise into set angle α in aximuthpiston, that is, returns initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (7), test obtains lobe near antenna
The detailed process of contrapolarization pitch orientation figure is as follows：
(7d), by tested antenna in the pitch plane rotational angle α downwards；
(7e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining lobe near antenna is drawn respectively；
(7f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
A kind of new method of above-mentioned test satellite antenna pattern, in step (9), calculation machine removes test number
Improper data according in, and carry out following statistical computation：
(9a), according to the nearby lobe azimuth pattern of tested antenna and nearby the data of lobe pitch orientation figure are calculated day
Line transmitting gain；
(9b) tested antenna main lobe/the first secondary lobe isolation, is calculated, concrete calculating process is as follows：
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe in left side in nearby lobe azimuth pattern
Obtain left side main lobe/the first secondary lobe isolation δ in aximuthpistonphi,left；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe on right side in nearby lobe azimuth pattern
Obtain right side main lobe/the first secondary lobe isolation δ in aximuthpiston inner orientation planephi,right；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe in left side in nearby lobe pitch orientation figure
Obtain left side main lobe/the first secondary lobe isolation δ in pitch planetheta,left；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe on right side in nearby lobe pitch orientation figure
Obtain right side main lobe/the first secondary lobe isolation δ in pitch planetheta,right；
(9c), nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, remote secondary lobe azimuth pattern, remote secondary lobe pitching
Directional diagram is compared with the standard envelope for setting, and exceeds the data point of standard envelope value, go forward side by side in recording the directional diagram
Line identifier and record；
(9d), polarization isolation is calculated by the following method：
According to the ratio of the maximum in the nearby maximum of lobe azimuth pattern and nearby lobe contrapolarization azimuth pattern
Obtain orientation polarization isolation；
According to the ratio of the maximum in the nearby maximum of lobe pitch orientation figure and nearby lobe contrapolarization pitch orientation figure
For pitching polarization isolation.
A kind of new method of above-mentioned test satellite antenna pattern, in step (1), the frequency test signal is stable
Degree≤1KHz, power stability≤0.5dB.
Present invention advantage compared with prior art is：
(1), the present invention adopts audiofrequency spectrometer gathered data, and the test data in calculation machine is carried out processing, is united
Meter, it is possible to achieve later data process, obtains test result according to statistical method；
(2), the present invention respectively test obtain near lobe directional diagram and nearby lobe contrapolarization directional diagram, and utilize direction figure
Statistics obtains polarization isolation, can improve the computational accuracy of polarization isolation；
(3), when calculation machine carries out data analysiss, the improper data in test data can be removed,
Avoid impact of the accidental mistake to test result.
Description of the drawings
Fig. 1 is the composition frame chart of test system in the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The present invention is defined according to antenna radiation pattern, is tested by the method for continuous scanning peak value level point, with day
Line is rotated, and records the level that each aerial angle receives signal, and the level value is the relative gain of respective antenna.Traditional audiofrequency spectrometer
Test mode can only be tested with 0 Span pattern single sweep operation methods, and the present invention may be selected 0 Span by automated manner
Method and continuous sweep method are tested.
Using travel direction figure of the present invention tested when, can record in calculation machine tested antenna model,
The nominal gain of size, antenna, and determine the test antenna whether whether limited location in orientation and pitching.
The method of testing of the present invention realized by satellite antenna test system, and the test system includes testing station, by survey station
With test satellite, wherein the testing station include calculation machine, audiofrequency spectrometer and test antenna, by survey station include tested antenna,
Signal generating module, concrete methods of realizing step are as follows：
(1) satellite after tested antenna net entering corresponding to uplink service, is chosen as test satellite, and according to test satellite
Working frequency range and polarization mode, in the signal generating module by survey station set test signal mid frequency and polarization side
Formula, and the test signal is sent to tested antenna, the test signal for receiving is sent to by tested antenna by up-link
Test satellite；Test passing of satelline downlink forwards the test signal to test antenna, the test antenna transmission test
To audiofrequency spectrometer, the level data of test signal is sent to calculation machine to signal by audiofrequency spectrometer, wherein, test the positive polarization of antenna
Signal output is connected with audiofrequency spectrometer；
Wherein, signal generator and high power amplifier are included by the signal generating module of survey station.Signal generator output single-frequency is carried
Ripple, the frequency test signal degree of stability≤1KHz, power stability≤0.5dB；High power amplifier according to the transmission power of single frequency carrier,
The transmitting gain of tested antenna, the path attenuation of up-link, the gain shift of test satellite repeater, the path of downlink
The level requirements of decay, the reception gain of test antenna and audiofrequency spectrometer, set the gain of high power amplifier so that the frequency in testing station
The test signal level value that spectrometer is received meets the testing requirement of audiofrequency spectrometer.
Before transmitting test signal, can first be launched and be closed continuous operation, observation testing station intermediate frequency spectrometer connects
The frequency spectrum collected mail number, if the spectral line of the respective frequencies is being launched or during shutoff operation, appeared or disappeared, then proves to survey
Trial signal transmitting is correct.
(2) azimuth and the angle of pitch of tested antenna, are adjusted so that the main lobe alignment test satellite of the tested antenna,
And record azimuth and the angle of pitch of the tested antenna after adjustment；
(3) polarisation angles of tested antenna, are adjusted so that main polarization signal and antipole that testing station intermediate frequency spectrometer is received
The power difference for changing signal is maximum；Implement process as follows：
(3a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record audiofrequency spectrometer output
The frequency spectrum data of positive polarization signal；
(3b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna is adjusted, directly
The power difference of the positive polarization signal recorded with step (3a) to the power of the contrapolarization signal is maximum, then fix tested antenna
Polarizing angle；
(4), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, and by tested antenna in pitching and orientation
According to lobe angle [alpha] uniform rotation near setting in plane, in tested antenna rotation process, the audiofrequency spectrometer of testing station will be tested
The level data for obtaining is sent to calculation machine, and calculation machine is drawn near antenna respectively according to the test level data
The pitch orientation figure of lobe near the azimuth pattern and antenna of lobe；
Wherein, test obtain the azimuth pattern of lobe near antenna detailed process it is as follows：
(4a), by tested antenna in the aximuthpiston rotated counterclockwise by angle α；
(4b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the azimuth pattern for obtaining lobe near antenna respectively；
(4c), by tested antenna in the aximuthpiston rotate counterclockwise set angle α, that is, return initial position.
Wherein, the detailed process of the pitch orientation figure that test obtains lobe near antenna is as follows：
(4d), by tested antenna in pitch plane to lower anglec of rotation α；
(4e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining lobe near antenna is drawn respectively；
(4f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
Wherein, the nearby lobe angle [alpha] of the setting is set according to the working frequency range of tested antenna, wherein, set in C frequency ranges
α=3 °, set α=1.5 ° in Ku frequency ranges, set α=1.5 ° in DBS frequency ranges.
(5), the remote secondary lobe angle beta uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, tested
In antenna rotation process, the level data that test is obtained is sent to calculation machine, calculation machine by the audiofrequency spectrometer of testing station
Draw the pitch orientation figure of the azimuth pattern and the remote secondary lobe of antenna of the remote secondary lobe of antenna according to the test level data respectively；Its
In, β>α；
Wherein, the detailed process of the azimuth pattern that test obtains the remote secondary lobe of antenna is as follows：
(5a) tested antenna is rotated counterclockwise into angle beta in aximuthpiston,；
(5b), tested antenna 2 β of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the azimuth pattern for obtaining the remote secondary lobe of antenna respectively；
(5c) tested antenna is rotated counterclockwise into set angle β in aximuthpiston, that is, returns initial position.
Wherein, the detailed process of the pitch orientation figure that test obtains the remote secondary lobe of antenna is as follows：
(5d), by tested antenna in the pitch plane rotational angle β downwards；
(5e), tested antenna is at the uniform velocity rotated up 2 β of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining the remote secondary lobe of antenna is drawn respectively；
(5f), by tested antenna in the pitch plane rotational angle β downwards, that is, return initial position.
In this step, remote secondary lobe angle beta according to tested antenna working frequency range set, wherein, C frequency ranges set β=
, β=8 ° are set in Ku frequency ranges, set β=8 ° in DBS frequency ranges by 15 °.
(6), the polarisation angles of tested antenna are rotated by 90 °, that is, tested antenna is set in contrapolarization, and in the polarization
It is finely adjusted in the range of angle ± γ so that main polarization signal and the work(of contrapolarization signal that testing station intermediate frequency spectrometer is received
Rate difference is maximum, wherein, γ≤10 °；Concrete methods of realizing is as follows：
(6a), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the contrapolarization of audiofrequency spectrometer output is recorded
The frequency spectrum data of signal；
(6b), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, is entered in the range of polarisation angles ± γ
Row adjustment, it is until the power difference maximum of the contrapolarization signal that power and the step (6a) of the positive polarization signal are recorded, then solid
The polarizing angle of fixed tested antenna；
(7), the nearby lobe angle [alpha] uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, tested
In antenna rotation process, the level data that test is obtained is sent to calculation machine, calculation machine by the audiofrequency spectrometer of testing station
The contrapolarization of lobe near the contrapolarization azimuth pattern and antenna of lobe near antenna is drawn respectively according to the test level data
Pitch orientation figure；
Wherein, the detailed process of the contrapolarization azimuth pattern that test obtains lobe near antenna is as follows：
(7a) tested antenna is rotated counterclockwise into angle [alpha] in aximuthpiston,；
(7b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process,
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer of testing station, and calculation machine is according to the test level
Data draw the contrapolarization azimuth pattern for obtaining lobe near antenna respectively；
(7c) tested antenna is rotated counterclockwise into set angle α in aximuthpiston, that is, returns initial position.
Wherein, the detailed process of the contrapolarization pitch orientation figure that test obtains lobe near antenna is as follows：
(7d), by tested antenna in the pitch plane rotational angle α downwards；
(7e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The pitch orientation figure for obtaining lobe near antenna is drawn respectively；
(7f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
(8) polarisation angles for, adjusting tested antenna are rotated by 90 °, will tested tested rotating platform return positive polarization mode, and
It is finely adjusted in the range of the polarisation angles ± γ so that main polarization signal and contrapolarization that testing station intermediate frequency spectrometer is received
The power difference of signal is maximum, and concrete method of adjustment is as follows：
(8a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record audiofrequency spectrometer output
The frequency spectrum data of positive polarization signal；
(8b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna is adjusted, directly
The power difference of the positive polarization signal recorded with step (8a) to the power of the contrapolarization signal is maximum, then fix tested antenna
Polarizing angle.
(8c), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer.
(9), the pattern data that calculation machine is obtained according to step (4), (5) and (7) test, statistical computation is by observation
The performance data of line, the performance data include antenna transmitting gain, the isolation of main lobe/the first secondary lobe, polarization isolation, concrete to unite
Meter calculating process includes：
(9a), according to the nearby lobe azimuth pattern of tested antenna and nearby the data of lobe pitch orientation figure are calculated day
Line transmitting gain；
(9b) tested antenna main lobe/the first secondary lobe isolation, is calculated, concrete calculating process is as follows：
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe in left side in nearby lobe azimuth pattern
Obtain left side main lobe/the first secondary lobe isolation δ in aximuthpistonphi,left；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe on right side in nearby lobe azimuth pattern
Obtain right side main lobe/the first secondary lobe isolation δ in aximuthpiston inner orientation planephi,right；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe in left side in nearby lobe pitch orientation figure
Obtain left side main lobe/the first secondary lobe isolation δ in pitch planetheta,left；
According to the antenna gain ratio of the antenna gain and main lobe of first secondary lobe on right side in nearby lobe pitch orientation figure
Obtain right side main lobe/the first secondary lobe isolation δ in pitch planetheta,right；
(9c), nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, remote secondary lobe azimuth pattern, remote secondary lobe pitching
Directional diagram is compared with the standard envelope for setting, and exceeds the data point of standard envelope value, go forward side by side in recording the directional diagram
Line identifier and record；
(9d), polarization isolation is calculated by the following method：
According to the ratio of the maximum in the nearby maximum of lobe azimuth pattern and nearby lobe contrapolarization azimuth pattern
Obtain orientation polarization isolation；
According to the ratio of the maximum in the nearby maximum of lobe pitch orientation figure and nearby lobe contrapolarization pitch orientation figure
For pitching polarization isolation.
The above, optimal specific embodiment only of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.
The content not being described in detail in description of the invention belongs to professional and technical personnel in the field's known technology.
Claims (11)
1. it is a kind of test satellite antenna pattern new method, it is characterised in that：Realized by satellite antenna test system, it is described
Satellite antenna test system include testing station, by survey station and test satellite, wherein the testing station includes calculation machine, frequency spectrum
Instrument and test antenna, are included tested antenna, signal generating module by survey station, and concrete methods of realizing step is as follows：
(1), the working frequency range and polarization mode according to test satellite, sets test signal in the signal generating module by survey station
Mid frequency and polarization mode, and send the test signal to tested antenna, tested antenna is by the test signal for receiving
Test satellite is sent to by up-link；Test passing of satelline downlink forwards the test signal to test antenna, surveys
Examination antenna sends the test signal to audiofrequency spectrometer, and the level data of test signal is sent to calculation machine by audiofrequency spectrometer, its
In, the positive polarization signal output for testing antenna is connected with audiofrequency spectrometer；
(2) azimuth and the angle of pitch of tested antenna, are adjusted so that the main lobe alignment test satellite of the tested antenna, and is remembered
The azimuth of the tested antenna after record adjustment and the angle of pitch；
(3) polarisation angles of tested antenna, are adjusted so that main polarization signal and contrapolarization letter that testing station intermediate frequency spectrometer is received
Number power difference it is maximum；Implement process as follows：
(3a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record the positive pole of audiofrequency spectrometer output
Change the frequency spectrum data of signal；
(3b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna, Zhi Daosuo is adjusted
The power difference of the positive polarization signal that the power and step (3a) for stating contrapolarization signal is recorded is maximum, then fix the pole of tested antenna
Change angle；
(4), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, and by tested antenna in pitching and aximuthpiston
The interior nearby lobe angle [alpha] uniform rotation according to setting, in tested antenna rotation process, test is obtained by the audiofrequency spectrometer of testing station
Level data be sent to calculation machine, calculation machine draws lobe near antenna respectively according to the test level data
The pitch orientation figure of lobe near azimuth pattern and antenna；
(5), the remote secondary lobe angle beta uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, in tested antenna
In rotation process, the audiofrequency spectrometer of testing station will be tested the level data that obtains and be sent to calculation machine, calculation machine according to
The test level data draw the pitch orientation figure of the azimuth pattern of the remote secondary lobe of antenna and the remote secondary lobe of antenna respectively；Wherein, β
>α；
(6), the polarisation angles of tested antenna are rotated by 90 °, and are finely adjusted in the range of the polarisation angles ± γ so that
The main polarization signal and the power difference of contrapolarization signal that testing station intermediate frequency spectrometer is received is maximum, wherein, γ≤10 °；Specifically
Implementation method is as follows：
(6a), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the contrapolarization signal of audiofrequency spectrometer output is recorded
Frequency spectrum data；
(6b), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer, is adjusted in the range of polarisation angles ± γ
It is whole, until the power difference maximum of the contrapolarization signal that power and the step (6a) of the positive polarization signal are recorded, then fix quilt
The polarizing angle of observation line；
(7), the nearby lobe angle [alpha] uniform rotation according to setting in the pitching and aximuthpiston by tested antenna, in tested antenna
In rotation process, the audiofrequency spectrometer of testing station will be tested the level data that obtains and be sent to calculation machine, calculation machine according to
The test level data draw the contrapolarization pitching of lobe near the contrapolarization azimuth pattern and antenna of lobe near antenna respectively
Directional diagram；
(8) polarisation angles for, adjusting tested antenna are rotated by 90 °, and are finely adjusted in the range of the polarisation angles ± γ, make
The main polarization signal that receives of testing station intermediate frequency spectrometer and contrapolarization signal power difference it is maximum, concrete method of adjustment is such as
Under：
(8a), under the positive polarization signal output and audiofrequency spectrometer condition of contact of test antenna, record the positive pole of audiofrequency spectrometer output
Change the frequency spectrum data of signal；
(8b), the contrapolarization signal output of test antenna is connected with audiofrequency spectrometer, the polarizing angle of tested antenna, Zhi Daosuo is adjusted
The power difference of the positive polarization signal that the power and step (8a) for stating contrapolarization signal is recorded is maximum, then fix the pole of tested antenna
Change angle；
(8c), the positive polarization signal output of test antenna is connected with audiofrequency spectrometer；
(9), the pattern data that calculation machine is obtained according to step (4), (5) and (7) test, the tested antenna of statistical computation
Performance data, the performance data include antenna transmitting gain, the isolation of main lobe/the first secondary lobe, polarization isolation.
2. it is according to claim 1 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step (4)
Interior, the nearby lobe angle [alpha] of the setting is set according to the working frequency range of tested antenna, wherein, α=3 ° are set in C frequency ranges, in Ku
Frequency range sets α=1.5 °, sets α=1.5 ° in DBS frequency ranges.
3. it is according to claim 1 and 2 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step
(4), in, the detailed process that test obtains the azimuth pattern of lobe near antenna is as follows：
(4a), by tested antenna in the aximuthpiston rotated counterclockwise by angle α；
(4b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The azimuth pattern for obtaining lobe near antenna is drawn respectively；
(4c), by tested antenna in the aximuthpiston rotate counterclockwise set angle α, that is, return initial position.
4. it is according to claim 1 and 2 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step
(4), in, the detailed process for testing the pitch orientation figure for obtaining lobe near antenna is as follows：
(4d), by tested antenna in pitch plane to lower anglec of rotation α；
(4e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, testing station
The level data that test is obtained is sent to calculation machine by audiofrequency spectrometer, and calculation machine is distinguished according to the test level data
Drafting obtains the pitch orientation figure of lobe near antenna；
(4f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
5. it is according to claim 1 it is a kind of test satellite antenna pattern new method, it is characterised in that：
In step (5), the remote secondary lobe angle beta according to tested antenna working frequency range set, wherein, C frequency ranges set β=
, β=8 ° are set in Ku frequency ranges, set β=8 ° in DBS frequency ranges by 15 °.
6. according to claim 1 or 5 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step
(5), in, the detailed process for testing the azimuth pattern for obtaining the remote secondary lobe of antenna is as follows：
(5a) tested antenna is rotated counterclockwise into angle beta in aximuthpiston,；
(5b), tested antenna 2 β of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The azimuth pattern for obtaining the remote secondary lobe of antenna is drawn respectively；
(5c) tested antenna is rotated counterclockwise into set angle β in aximuthpiston, that is, returns initial position.
7. according to claim 1 or 5 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step
(5), in, the detailed process for testing the pitch orientation figure for obtaining the remote secondary lobe of antenna is as follows：
(5d), by tested antenna in the pitch plane rotational angle β downwards；
(5e), tested antenna is at the uniform velocity rotated up 2 β of angle in pitch plane, in tested antenna rotation process, testing station
The level data that test is obtained is sent to calculation machine by audiofrequency spectrometer, and calculation machine is distinguished according to the test level data
Drafting obtains the pitch orientation figure of the remote secondary lobe of antenna；
(5f), by tested antenna in the pitch plane rotational angle β downwards, that is, return initial position.
8. it is according to claim 1 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step (7)
Interior, the detailed process for testing the contrapolarization azimuth pattern for obtaining lobe near antenna is as follows：
(7a) tested antenna is rotated counterclockwise into angle [alpha] in aximuthpiston,；
(7b), tested antenna 2 α of uniform rotation angle clockwise in azimuthal plane, in tested antenna rotation process, test
The level data that test is obtained is sent to calculation machine by the audiofrequency spectrometer stood, and calculation machine is according to the test level data
The contrapolarization azimuth pattern for obtaining lobe near antenna is drawn respectively；
(7c) tested antenna is rotated counterclockwise into set angle α in aximuthpiston, that is, returns initial position.
9. it is according to claim 1 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step (7)
Interior, the detailed process for testing the contrapolarization pitch orientation figure for obtaining lobe near antenna is as follows：
(7d), by tested antenna in the pitch plane rotational angle α downwards；
(7e), tested antenna is at the uniform velocity rotated up 2 α of angle in pitch plane, in tested antenna rotation process, testing station
The level data that test is obtained is sent to calculation machine by audiofrequency spectrometer, and calculation machine is distinguished according to the test level data
Drafting obtains the pitch orientation figure of lobe near antenna；
(7f) tested antenna is rotated down into set angle α in pitch plane, that is, returns initial position.
10. it is according to claim 1 it is a kind of test satellite antenna pattern new method, it is characterised in that：In step (9)
In, calculation machine removes the improper data in test data, and carries out following statistical computation：
(9a), it is calculated antenna according to lobe azimuth pattern near tested antenna and the nearby data of lobe pitch orientation figure to send out
Penetrate gain；
(9b) tested antenna main lobe/the first secondary lobe isolation, is calculated, concrete calculating process is as follows：
It is worth to the antenna gain ratio of main lobe according to the antenna gain of first secondary lobe in left side in nearby lobe azimuth pattern
Left side main lobe/the first secondary lobe isolation δ in aximuthpistonphi,left；
It is worth to the antenna gain ratio of main lobe according to the antenna gain of first secondary lobe on right side in nearby lobe azimuth pattern
Right side main lobe/the first secondary lobe isolation δ in aximuthpiston inner orientation planephi,right；
It is worth to the antenna gain ratio of main lobe according to the antenna gain of first secondary lobe in left side in nearby lobe pitch orientation figure
Left side main lobe/the first secondary lobe isolation δ in pitch planetheta,left；
It is worth to the antenna gain ratio of main lobe according to the antenna gain of first secondary lobe on right side in nearby lobe pitch orientation figure
Right side main lobe/the first secondary lobe isolation δ in pitch planetheta,right；
(9c), nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, remote secondary lobe azimuth pattern, remote secondary lobe pitch orientation
Scheme to compare with the standard envelope of setting, in recording the directional diagram, exceed the data point of standard envelope value, rower of going forward side by side
Know and record；
(9d), polarization isolation is calculated by the following method：
It is worth to according to the ratio of the maximum in the nearby maximum of lobe azimuth pattern and nearby lobe contrapolarization azimuth pattern
Orientation polarization isolation；
According to the ratio of the maximum in the nearby maximum of lobe pitch orientation figure and nearby lobe contrapolarization pitch orientation figure to bow
Face upward polarization isolation.
A kind of 11. new methods of test satellite antenna pattern according to claim 1, it is characterised in that：In step (1)
In, the frequency test signal degree of stability≤1KHz, test signal power stability≤0.5dB.
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