CN104660351A - Novel method for testing directional diagram of satellite antenna - Google Patents
Novel method for testing directional diagram of satellite antenna Download PDFInfo
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- CN104660351A CN104660351A CN201410830481.9A CN201410830481A CN104660351A CN 104660351 A CN104660351 A CN 104660351A CN 201410830481 A CN201410830481 A CN 201410830481A CN 104660351 A CN104660351 A CN 104660351A
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Abstract
The invention relates to a novel method for testing a directional diagram of a satellite antenna. The method is implemented by a satellite antenna test system. The test system comprises a test station, a tested station and a test satellite, wherein the test station comprises a test computer, a spectrometer and a test antenna; the tested station comprises a tested antenna and a signal generation module. According to the method, the spectrometer is used for acquiring data, and the test data is processed and counted in the test computer, so that late data processing can be realized; a test result is obtained by a statistical method; furthermore, during data analysis by the test computer, abnormal data in the test data can be removed, and the influence of an accidental mistake on the test result is avoided; by the method, a near sidelobe directional diagram and a near sidelobe depolarization directional diagram can be respectively tested; the polarization isolation degree can be obtained by statistics by the directional diagram, and the calculating precision of the polarization isolation degree can be improved.
Description
Technical field
The present invention relates to satellite antenna field tests, particularly a kind of new method of testing satellite antenna pattern, be applicable to the antenna net entering validation test of C, Ku, DBS satellite communication frequency range.
Background technology
Because satellite communication system is an open system, be very easy to be interfered; Extraneous signal in any frequency range all can enter satellite system, affects satellite regular traffic.Therefore, satellite antenna dispatches from the factory or formally enters satellite communication network (being called for short " networking ") and carries out launching or before Received signal strength, having to pass through Antenna Pattern Measuring Test.Test result meets Specifications and can dispatch from the factory or network.
Technical indicator generally comprises: 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; Whether antenna sidelobe performance determines side-lobe signal to be revealed and is up to the downstream signal closing on satellite or whether have received contiguous satellite; Cross polarization isolation is then investigated and whether leakage signal is up to satellite to contrapolarization or have received the signal of contrapolarization on satellite; Gain curve shape then judges whether the gain envelope line meeting ITU suggestion.Technical indicator is undesirable not only affects other business, also can make a very bad impression to the business of oneself.
The general frequency spectrograph that adopts of satellite antenna pattern test directly records (manual mode), derives and print after directional diagram curve being saved as picture file.Domestic most antenna manufacturer all adopts in this way, and advantage is convenient, fast, and shortcoming lacks later data process, judges whether some technical parameter meets index request and have any problem.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of new method of testing satellite antenna pattern, the method adopts frequency spectrograph image data, and this test data is carried out in test computer process, add up, later data process can be realized, obtain test result according to statistical method, and when test computer carries out data analysis, improper data in test data can be removed, avoid the impact of accidental mistake on test result; The method test respectively and obtain near lobe directional diagram and nearby lobe contrapolarization directional diagram, and utilize this directional diagram to add up to obtain polarization isolation, the computational accuracy of polarization isolation can be improved.
Above-mentioned purpose of the present invention is mainly achieved by following technical solution:
A kind of new method of testing satellite antenna pattern, realized by satellite antenna test macro, described satellite antenna test macro comprises testing station, by survey station and test satellite, wherein said testing station comprises test computer, frequency spectrograph and test antenna, comprised tested antenna, signal generating module by survey station, concrete methods of realizing step is as follows:
(1), according to working frequency range and the polarization mode of test satellite, set centre frequency and the polarization mode of test signal in by the signal generating module of survey station, and sending described test signal to tested antenna, the test signal received is sent to test satellite by up link by tested antenna; Test passing of satelline down link forwards described test signal to test antenna, test antenna sends described test signal to frequency spectrograph, the level data of test signal is sent to test computer by frequency spectrograph, and wherein, the positive polarization signal output of test antenna is connected with frequency spectrograph;
(2), adjust azimuth and the angle of pitch of tested antenna, make the main lobe of described tested antenna aim at test satellite, and the azimuth of tested antenna after record adjustment and the angle of pitch;
(3), adjust the polarisation angles of tested antenna, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum; Specific implementation process is as follows:
(3a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(3b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (3a) record is maximum, then fix the polarizing angle of tested antenna;
(4), the positive polarization signal output of test antenna is connected with frequency spectrograph, and by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the pitch orientation figure of lobe near the azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
(5), by the secondary lobe angle beta far away uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the azimuth pattern of antenna secondary lobe far away and the pitch orientation figure of antenna secondary lobe far away respectively according to described test level data; Wherein, β > α;
(6), by the polarisation angles half-twist of tested antenna, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, wherein, γ≤10 °; Concrete methods of realizing is as follows:
(6a), by the contrapolarization signal output of test antenna be connected with frequency spectrograph, the frequency spectrum data of the contrapolarization signal that record frequency spectrograph exports;
(6b), the positive polarization signal output of test antenna is connected with frequency spectrograph, adjust within the scope of polarisation angles ± γ, until the power difference of contrapolarization signal that the power of described positive polarization signal and step (6a) record is maximum, then fix the polarizing angle of tested antenna;
(7), by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the contrapolarization pitch orientation figure of lobe near the contrapolarization azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
(8) the polarisation angles half-twist of tested antenna, is adjusted, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, concrete method of adjustment is as follows:
(8a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(8b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (8a) record is maximum, then fix the polarizing angle of tested antenna.
(8c), the positive polarization signal output of test antenna is connected with frequency spectrograph.
(9), test computer tests according to step (4), (5) and (7) pattern data obtained, the performance data of the tested antenna of statistical computation, described performance data comprises antenna transmission gain, the isolation of main lobe/the first secondary lobe, polarization isolation.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (4), the nearby lobe angle [alpha] of described setting sets according to the working frequency range of tested antenna, wherein, in C frequency range setting α=3 °, in Ku frequency range setting α=1.5 °, in DBS frequency range setting α=1.5 °.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (4), the detailed process that test obtains the azimuth pattern of lobe near antenna is as follows:
(4a), by tested antenna rotated counterclockwise by angle α in aximuthpiston;
(4b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining lobe near antenna respectively;
(4c), by tested antenna in aximuthpiston, be rotated counterclockwise set angle α, namely return initial position.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (4), the detailed process that test obtains the pitch orientation figure of lobe near antenna is as follows:
(4d), by tested antenna in pitch plane to lower anglec of rotation α;
(4e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(4f), by tested antenna in pitch plane, be rotated down set angle α, namely return initial position.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (5), described secondary lobe angle beta far away sets according to the working frequency range of tested antenna, wherein, in C frequency range setting β=15 °, in Ku frequency range setting β=8 °, in DBS frequency range setting β=8 °.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (5), the detailed process that test obtains the azimuth pattern of antenna secondary lobe far away is as follows:
(5a), tested antenna is rotated counterclockwise angle beta in aximuthpiston;
(5b), tested antenna clockwise uniform rotation angle 2 β in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining antenna secondary lobe far away respectively;
(5c), by tested antenna in aximuthpiston, rotate counterclockwise set angle β, namely return initial position.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (5), the detailed process that test obtains the pitch orientation figure of antenna secondary lobe far away is as follows:
(5d), by tested antenna downward rotational angle β in pitch plane;
(5e), tested antenna at the uniform velocity upwards rotational angle 2 β in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining antenna secondary lobe far away respectively;
(5f), by tested antenna downward rotational angle β in pitch plane, namely initial position is returned.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (7), the detailed process that test obtains the contrapolarization azimuth pattern of lobe near antenna is as follows:
(7a), tested antenna is rotated counterclockwise angle [alpha] in aximuthpiston;
(7b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and the contrapolarization azimuth pattern obtaining lobe near antenna drawn respectively by test computer according to described test level data;
(7c), by tested antenna in aximuthpiston, rotate counterclockwise set angle α, namely return initial position.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (7), the detailed process that test obtains the contrapolarization pitch orientation figure of lobe near antenna is as follows:
(7d), by tested antenna downward rotational angle α in pitch plane;
(7e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(7f), by tested antenna in pitch plane, rotate set angle α, namely return initial position.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (9), the improper data in test data removed by test computer, and carry out following statistical computation:
(9a), antenna transmission gain is calculated according to the data of the nearby lobe azimuth pattern of tested antenna and nearby lobe pitch orientation figure;
(9b), calculate the isolation of tested antenna main lobe/the first secondary lobe, concrete computational process is as follows:
Obtain main lobe/the first secondary lobe on the left of in aximuthpiston according to the antenna gain of first secondary lobe in left side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, left;
Obtain main lobe/the first secondary lobe on the right side of in aximuthpiston inner orientation plane according to the antenna gain of first secondary lobe on right side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, right;
Obtain main lobe/the first secondary lobe on the left of in pitch plane according to the antenna gain of first secondary lobe in left side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, left;
Obtain main lobe/the first secondary lobe on the right side of in pitch plane according to the antenna gain of first secondary lobe on right side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, right;
(9c), the standard envelope of nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, secondary lobe azimuth pattern far away, far secondary lobe pitch orientation figure and setting is compared, record the data point exceeding standard envelope value in described directional diagram, go forward side by side line identifier and record;
(9d), polarization isolation is calculated by the following method:
Orientation polarization isolation is obtained according to the maximum of nearby lobe azimuth pattern and the ratio of the maximum in nearby lobe contrapolarization azimuth pattern;
Be pitching polarization isolation according to the maximum of nearby lobe pitch orientation figure and the ratio of the maximum in nearby lobe contrapolarization pitch orientation figure.
Above-mentioned a kind of new method of testing satellite antenna pattern, in step (1), described frequency test signal stability≤1KHz, power stability≤0.5dB.
The present invention's advantage is compared with prior art:
(1), the present invention adopts frequency spectrograph image data, and this test data carried out processing, adding up in test computer, can realize later data process, obtain test result according to statistical method;
(2), the present invention test respectively and obtain near lobe directional diagram and nearby lobe contrapolarization directional diagram, and utilize this directional diagram to add up to obtain polarization isolation, the computational accuracy of polarization isolation can be improved;
(3), when test computer carries out data analysis, the improper data in test data can be removed, avoid the impact of accidental mistake on test result.
Accompanying drawing explanation
Fig. 1 is the composition frame chart of test macro in the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The present invention defines according to antenna pattern, is tested by the method for continuous sweep peak point level, along with antenna rotates, records the level of each aerial angle Received signal strength, the relative gain of this level value and respective antenna.Tradition frequency spectrograph test mode can only be tested by 0 Span pattern single sweep operation method, and the present invention can select 0 Span method and continuous sweep method to test by automated manner.
When adopting travel direction figure of the present invention to test, the nominal gain of tested antenna model, size, antenna can be recorded in test computer, and determine this test antenna whether whether limited location in orientation and pitching.
Method of testing of the present invention is realized by satellite antenna test macro, this test macro comprises testing station, by survey station and test satellite, wherein said testing station comprises test computer, frequency spectrograph and test antenna, comprised tested antenna, signal generating module by survey station, concrete methods of realizing step is as follows:
(1) satellite after, choosing tested antenna net entering corresponding to uplink service is as testing satellite, and according to testing working frequency range and the polarization mode of satellite, set centre frequency and the polarization mode of test signal in by the signal generating module of survey station, and sending described test signal to tested antenna, the test signal received is sent to test satellite by up link by tested antenna; Test passing of satelline down link forwards described test signal to test antenna, test antenna sends described test signal to frequency spectrograph, the level data of test signal is sent to test computer by frequency spectrograph, and wherein, the positive polarization signal output of test antenna is connected with frequency spectrograph;
Wherein, signal generator and high power amplifier is comprised by the signal generating module of survey station.Signal generator exports single frequency carrier, this frequency test signal stability≤1KHz, power stability≤0.5dB; High power amplifier is according to the level requirements of the gain shift of the path attenuation of the transmitting gain of the transmitting power of single frequency carrier, tested antenna, up link, test satellite repeater, the path attenuation of down link, the receiving gain of test antenna and frequency spectrograph, set the gain of high power amplifier, the test signal level value that the frequency spectrograph in testing station is received meets the testing requirement of frequency spectrograph.
Before emissioning testing signal, can first carry out launching and closing continued operation, the frequency spectrum of observation testing station intermediate frequency spectrometer Received signal strength, if the spectral line of described respective frequencies carry out launching or shutoff operation time, occur or disappear, then proving that test signal is launched correct.
(2), adjust azimuth and the angle of pitch of tested antenna, make the main lobe of described tested antenna aim at test satellite, and the azimuth of tested antenna after record adjustment and the angle of pitch;
(3), adjust the polarisation angles of tested antenna, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum; Specific implementation process is as follows:
(3a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(3b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (3a) record is maximum, then fix the polarizing angle of tested antenna;
(4), the positive polarization signal output of test antenna is connected with frequency spectrograph, and by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the pitch orientation figure of lobe near the azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
Wherein, the detailed process obtaining the azimuth pattern of lobe near antenna is tested as follows:
(4a), by tested antenna rotated counterclockwise by angle α in aximuthpiston;
(4b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining lobe near antenna respectively;
(4c), by tested antenna in aximuthpiston, be rotated counterclockwise set angle α, namely return initial position.
Wherein, the detailed process obtaining the pitch orientation figure of lobe near antenna is tested as follows:
(4d), by tested antenna in pitch plane to lower anglec of rotation α;
(4e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(4f), by tested antenna in pitch plane, be rotated down set angle α, namely return initial position.
Wherein, the nearby lobe angle [alpha] of described setting sets according to the working frequency range of tested antenna, wherein, in C frequency range setting α=3 °, in Ku frequency range setting α=1.5 °, in DBS frequency range setting α=1.5 °.
(5), by the secondary lobe angle beta far away uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the azimuth pattern of antenna secondary lobe far away and the pitch orientation figure of antenna secondary lobe far away respectively according to described test level data; Wherein, β > α;
Wherein, the detailed process obtaining the azimuth pattern of antenna secondary lobe far away is tested as follows:
(5a), tested antenna is rotated counterclockwise angle beta in aximuthpiston;
(5b), tested antenna clockwise uniform rotation angle 2 β in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining antenna secondary lobe far away respectively;
(5c), by tested antenna in aximuthpiston, rotate counterclockwise set angle β, namely return initial position.
Wherein, the detailed process obtaining the pitch orientation figure of antenna secondary lobe far away is tested as follows:
(5d), by tested antenna downward rotational angle β in pitch plane;
(5e), tested antenna at the uniform velocity upwards rotational angle 2 β in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining antenna secondary lobe far away respectively;
(5f), by tested antenna downward rotational angle β in pitch plane, namely initial position is returned.
In this step, secondary lobe angle beta far away sets according to the working frequency range of tested antenna, wherein, in C frequency range setting β=15 °, in Ku frequency range setting β=8 °, in DBS frequency range setting β=8 °.
(6), by the polarisation angles half-twist of tested antenna, namely set tested antenna and be in contrapolarization, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, wherein, γ≤10 °; Concrete methods of realizing is as follows:
(6a), by the contrapolarization signal output of test antenna be connected with frequency spectrograph, the frequency spectrum data of the contrapolarization signal that record frequency spectrograph exports;
(6b), the positive polarization signal output of test antenna is connected with frequency spectrograph, adjust within the scope of polarisation angles ± γ, until the power difference of contrapolarization signal that the power of described positive polarization signal and step (6a) record is maximum, then fix the polarizing angle of tested antenna;
(7), by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the contrapolarization pitch orientation figure of lobe near the contrapolarization azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
Wherein, the detailed process obtaining the contrapolarization azimuth pattern of lobe near antenna is tested as follows:
(7a), tested antenna is rotated counterclockwise angle [alpha] in aximuthpiston;
(7b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and the contrapolarization azimuth pattern obtaining lobe near antenna drawn respectively by test computer according to described test level data;
(7c), by tested antenna in aximuthpiston, rotate counterclockwise set angle α, namely return initial position.
Wherein, the detailed process obtaining the contrapolarization pitch orientation figure of lobe near antenna is tested as follows:
(7d), by tested antenna downward rotational angle α in pitch plane;
(7e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(7f), by tested antenna in pitch plane, rotate set angle α, namely return initial position.
(8) the polarisation angles half-twist of tested antenna, is adjusted, positive polarization mode is returned by tested tested rotating platform, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, concrete method of adjustment is as follows:
(8a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(8b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (8a) record is maximum, then fix the polarizing angle of tested antenna.
(8c), the positive polarization signal output of test antenna is connected with frequency spectrograph.
(9), test computer tests according to step (4), (5) and (7) pattern data obtained, the performance data of the tested antenna of statistical computation, described performance data comprises antenna transmission gain, the isolation of main lobe/the first secondary lobe, polarization isolation, and concrete statistical computation process comprises:
(9a), antenna transmission gain is calculated according to the data of the nearby lobe azimuth pattern of tested antenna and nearby lobe pitch orientation figure;
(9b), calculate the isolation of tested antenna main lobe/the first secondary lobe, concrete computational process is as follows:
Obtain main lobe/the first secondary lobe on the left of in aximuthpiston according to the antenna gain of first secondary lobe in left side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, left;
Obtain main lobe/the first secondary lobe on the right side of in aximuthpiston inner orientation plane according to the antenna gain of first secondary lobe on right side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, right;
Obtain main lobe/the first secondary lobe on the left of in pitch plane according to the antenna gain of first secondary lobe in left side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, left;
Obtain main lobe/the first secondary lobe on the right side of in pitch plane according to the antenna gain of first secondary lobe on right side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, right;
(9c), the standard envelope of nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, secondary lobe azimuth pattern far away, far secondary lobe pitch orientation figure and setting is compared, record the data point exceeding standard envelope value in described directional diagram, go forward side by side line identifier and record;
(9d), polarization isolation is calculated by the following method:
Orientation polarization isolation is obtained according to the maximum of nearby lobe azimuth pattern and the ratio of the maximum in nearby lobe contrapolarization azimuth pattern;
Be pitching polarization isolation according to the maximum of nearby lobe pitch orientation figure and the ratio of the maximum in nearby lobe contrapolarization pitch orientation figure.
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
The content be not described in detail in specification of the present invention belongs to professional and technical personnel in the field's known technology.
Claims (11)
1. test the new method of satellite antenna pattern for one kind, it is characterized in that: realized by satellite antenna test macro, described satellite antenna test macro comprises testing station, by survey station and test satellite, wherein said testing station comprises test computer, frequency spectrograph and test antenna, comprised tested antenna, signal generating module by survey station, concrete methods of realizing step is as follows:
(1), according to working frequency range and the polarization mode of test satellite, set centre frequency and the polarization mode of test signal in by the signal generating module of survey station, and sending described test signal to tested antenna, the test signal received is sent to test satellite by up link by tested antenna; Test passing of satelline down link forwards described test signal to test antenna, test antenna sends described test signal to frequency spectrograph, the level data of test signal is sent to test computer by frequency spectrograph, and wherein, the positive polarization signal output of test antenna is connected with frequency spectrograph;
(2), adjust azimuth and the angle of pitch of tested antenna, make the main lobe of described tested antenna aim at test satellite, and the azimuth of tested antenna after record adjustment and the angle of pitch;
(3), adjust the polarisation angles of tested antenna, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum; Specific implementation process is as follows:
(3a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(3b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (3a) record is maximum, then fix the polarizing angle of tested antenna;
(4), the positive polarization signal output of test antenna is connected with frequency spectrograph, and by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the pitch orientation figure of lobe near the azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
(5), by the secondary lobe angle beta far away uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the azimuth pattern of antenna secondary lobe far away and the pitch orientation figure of antenna secondary lobe far away respectively according to described test level data; Wherein, β > α;
(6), by the polarisation angles half-twist of tested antenna, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, wherein, γ≤10 °; Concrete methods of realizing is as follows:
(6a), by the contrapolarization signal output of test antenna be connected with frequency spectrograph, the frequency spectrum data of the contrapolarization signal that record frequency spectrograph exports;
(6b), the positive polarization signal output of test antenna is connected with frequency spectrograph, adjust within the scope of polarisation angles ± γ, until the power difference of contrapolarization signal that the power of described positive polarization signal and step (6a) record is maximum, then fix the polarizing angle of tested antenna;
(7), by the nearby lobe angle [alpha] uniform rotation according to setting in pitching and aximuthpiston of tested antenna, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws the contrapolarization pitch orientation figure of lobe near the contrapolarization azimuth pattern of lobe near antenna and antenna respectively according to described test level data;
(8) the polarisation angles half-twist of tested antenna, is adjusted, and finely tune in the scope of described polarisation angles ± γ, the main polarization signal that testing station intermediate frequency spectrometer is received and the power difference of contrapolarization signal maximum, concrete method of adjustment is as follows:
(8a), under the positive polarization signal output and frequency spectrograph condition of contact of test antenna, the frequency spectrum data of the positive polarization signal that record frequency spectrograph exports;
(8b), the contrapolarization signal output of test antenna is connected with frequency spectrograph, adjust the polarizing angle of tested antenna, until the power difference of positive polarization signal that the power of described contrapolarization signal and step (8a) record is maximum, then fix the polarizing angle of tested antenna.
(8c), the positive polarization signal output of test antenna is connected with frequency spectrograph.
(9), test computer tests according to step (4), (5) and (7) pattern data obtained, the performance data of the tested antenna of statistical computation, described performance data comprises antenna transmission gain, the isolation of main lobe/the first secondary lobe, polarization isolation.
2. a kind of new method of testing satellite antenna pattern according to claim 1, it is characterized in that: in step (4), the nearby lobe angle [alpha] of described setting sets according to the working frequency range of tested antenna, wherein, in C frequency range setting α=3 °, in Ku frequency range setting α=1.5 °, in DBS frequency range setting α=1.5 °.
3. a kind of new method of testing satellite antenna pattern according to claim 1 and 2, is characterized in that: in step (4), and the detailed process that test obtains the azimuth pattern of lobe near antenna is as follows:
(4a), by tested antenna rotated counterclockwise by angle α in aximuthpiston;
(4b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining lobe near antenna respectively;
(4c), by tested antenna in aximuthpiston, be rotated counterclockwise set angle α, namely return initial position.
4. a kind of new method of testing satellite antenna pattern according to claim 1 and 2, is characterized in that: in step (4), and the detailed process that test obtains the pitch orientation figure of lobe near antenna is as follows:
(4d), by tested antenna in pitch plane to lower anglec of rotation α;
(4e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(4f), by tested antenna in pitch plane, be rotated down set angle α, namely return initial position.
5. a kind of new method of testing satellite antenna pattern according to claim 1, is characterized in that:
In step (5), described secondary lobe angle beta far away sets according to the working frequency range of tested antenna, wherein, in C frequency range setting β=15 °, in Ku frequency range setting β=8 °, in DBS frequency range setting β=8 °.
6. a kind of new method of testing satellite antenna pattern according to claim 1 or 5, is characterized in that: in step (5), and the detailed process that test obtains the azimuth pattern of antenna secondary lobe far away is as follows:
(5a), tested antenna is rotated counterclockwise angle beta in aximuthpiston;
(5b), tested antenna clockwise uniform rotation angle 2 β in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the azimuth pattern obtaining antenna secondary lobe far away respectively;
(5c), by tested antenna in aximuthpiston, rotate counterclockwise set angle β, namely return initial position.
7. a kind of new method of testing satellite antenna pattern according to claim 1 or 5, is characterized in that: in step (5), and the detailed process that test obtains the pitch orientation figure of antenna secondary lobe far away is as follows:
(5d), by tested antenna downward rotational angle β in pitch plane;
(5e), tested antenna at the uniform velocity upwards rotational angle 2 β in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining antenna secondary lobe far away respectively;
(5f), by tested antenna downward rotational angle β in pitch plane, namely initial position is returned.
8. a kind of new method of testing satellite antenna pattern according to claim 1, is characterized in that: in step (7), and the detailed process that test obtains the contrapolarization azimuth pattern of lobe near antenna is as follows:
(7a), tested antenna is rotated counterclockwise angle [alpha] in aximuthpiston;
(7b), tested antenna clockwise uniform rotation angle 2 α in azimuthal plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and the contrapolarization azimuth pattern obtaining lobe near antenna drawn respectively by test computer according to described test level data;
(7c), by tested antenna in aximuthpiston, rotate counterclockwise set angle α, namely return initial position.
9. a kind of new method of testing satellite antenna pattern according to claim 1, is characterized in that: in step (7), and the detailed process that test obtains the contrapolarization pitch orientation figure of lobe near antenna is as follows:
(7d), by tested antenna downward rotational angle α in pitch plane;
(7e), tested antenna at the uniform velocity upwards rotational angle 2 α in pitch plane, in tested antenna rotation process, the frequency spectrograph of testing station sends to test computer by testing the level data obtained, and test computer draws according to described test level data the pitch orientation figure obtaining lobe near antenna respectively;
(7f), by tested antenna in pitch plane, rotate set angle α, namely return initial position.
10. a kind of new method of testing satellite antenna pattern according to claim 1, is characterized in that: in step (9), and the improper data in test data removed by test computer, and carry out following statistical computation:
(9a), antenna transmission gain is calculated according to the data of the nearby lobe azimuth pattern of tested antenna and nearby lobe pitch orientation figure;
(9b), calculate the isolation of tested antenna main lobe/the first secondary lobe, concrete computational process is as follows:
Obtain main lobe/the first secondary lobe on the left of in aximuthpiston according to the antenna gain of first secondary lobe in left side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, left;
Obtain main lobe/the first secondary lobe on the right side of in aximuthpiston inner orientation plane according to the antenna gain of first secondary lobe on right side in nearby lobe azimuth pattern with the antenna gain ratio of main lobe and isolate δ
phi, right;
Obtain main lobe/the first secondary lobe on the left of in pitch plane according to the antenna gain of first secondary lobe in left side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, left;
Obtain main lobe/the first secondary lobe on the right side of in pitch plane according to the antenna gain of first secondary lobe on right side in nearby lobe pitch orientation figure with the antenna gain ratio of main lobe and isolate δ
theta, right;
(9c), the standard envelope of nearly secondary lobe azimuth pattern, nearby lobe pitch orientation figure, secondary lobe azimuth pattern far away, far secondary lobe pitch orientation figure and setting is compared, record the data point exceeding standard envelope value in described directional diagram, go forward side by side line identifier and record;
(9d), polarization isolation is calculated by the following method:
Orientation polarization isolation is obtained according to the maximum of nearby lobe azimuth pattern and the ratio of the maximum in nearby lobe contrapolarization azimuth pattern;
Be pitching polarization isolation according to the maximum of nearby lobe pitch orientation figure and the ratio of the maximum in nearby lobe contrapolarization pitch orientation figure.
11. a kind of new methods of testing satellite antenna pattern according to claim 1, is characterized in that: in step (1), described frequency test signal stability≤1KHz, power stability≤0.5dB.
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| CN110018364A (en) * | 2019-05-07 | 2019-07-16 | 中国人民解放军32039部队 | Antenna radiation pattern Orbital detection method, system and electronic equipment |
| CN110726883A (en) * | 2019-11-21 | 2020-01-24 | 中电科仪器仪表有限公司 | Antenna test turntable dynamic control method for antenna directional pattern test |
| CN111682907A (en) * | 2020-04-29 | 2020-09-18 | 北京空间飞行器总体设计部 | Satellite antenna isolation high-precision test system |
| CN112130007A (en) * | 2020-09-25 | 2020-12-25 | 四川九洲电器集团有限责任公司 | Antenna far field directional diagram test system and test method |
| CN113111524A (en) * | 2021-04-21 | 2021-07-13 | 北京航空航天大学 | Antenna isolation degree prediction method based on receiving and transmitting antenna far field test data, storage medium and device |
| CN116068285A (en) * | 2022-12-28 | 2023-05-05 | 中国电信股份有限公司卫星通信分公司 | Satellite antenna network access test method and device and nonvolatile storage medium |
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Address after: 100094, No. 59 Village Road, Haidian District, Beijing Patentee after: China Satcom group Limited by Share Ltd Address before: 100094, No. 59 Village Road, Haidian District, Beijing Patentee before: Group Co., Ltd of China Satcom |