CN106342224B - A kind of measuring method of antenna amplitude-phase directional diagram - Google Patents
A kind of measuring method of antenna amplitude-phase directional diagramInfo
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- CN106342224B CN106342224B CN201010049876.7A CN201010049876A CN106342224B CN 106342224 B CN106342224 B CN 106342224B CN 201010049876 A CN201010049876 A CN 201010049876A CN 106342224 B CN106342224 B CN 106342224B
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Abstract
The invention belongs to antenna pattern measurement technology, relate to the improvement to antenna amplitude and phase pattern measuring method. Based on a radio frequency simulation laboratory being formed by shielded anechoic chamber [2], Target Aerial Array [3], three-axle table [4], Target Aerial Array calibration system [5], control module [6], standard signal source [7] and distributor [8]; The step of measuring antenna amplitude and phase pattern is as follows; Determine the electric axis zero-bit of measured antenna [1]; Calibrate the polarization plane of measured antenna [1]; Measure measured antenna [1] with the aximuthpiston of three-axle table [4] and pitch plane amplitude and the phase pattern on corresponding polarization plane. Measuring period of the present invention is short, measures efficiency and certainty of measurement high. The magnitude-phase characteristics that can efficiently, accurately measure antenna, instructs development and the improvement of antenna quickly.
Description
Technical field
The invention belongs to antenna pattern measurement technology, relate to antenna amplitude and phase pattern measurement sideThe improvement of method.
Background technology
Traditional antenna pattern measurement method has two kinds of Planar Near-Field Measurement method and far-field measurement methods.Planar Near-Field Measurement method is in the radiation near field of antenna array, uses the accurate traversing carriage of probe incorporatedMeasure antenna three-dimensional figure in the movement being parallel in a certain plane of Antenna aperture, by by calculatingMachine software completes a large amount of computings, completes distance and the transformational relation in angle, near field and far field, and passes throughThree-dimensional figure is obtained to the directional diagram of antenna principal polarization plane in the cutting of antenna principal polarization plane. The partyMethod is because need to be by carrying out complicated calculating by software, and measurement result is carried out to certain processingCan obtain corresponding pattern measurement result, thus high to the degree of dependence of computer software, and can notThe result of seeing in real time antenna pattern measurement, measuring period is longer, measures efficiency low, is unfavorable for antennaDevelopment and improvement. Meanwhile, Planar Near-Field Measurement can only be calculated the field of front half space, and along with fieldPoint departs from the increasing of the angle θ of Antenna aperture normal direction, during especially near θ=0 or π, methodThe obvious variation of precision. Far-field measurement method can be by measuring the antenna radiation pattern that directly obtains required plane.The method to measurement environment require high, require test site clear stop, around without large-scale power plant,The facilities such as high-voltage line etc. Meanwhile, the method is because require place large, so general in far-field measurement systemThere is no shielded anechoic chamber, the multipath effect of the barriers such as various interference and ground makes pattern measurement precision difficultyTo improve, the certainty of measurement of far-field pattern exceedes 1dB conventionally, and certainty of measurement is poor. For antenna directionThe measurement of figure, need efficiently accurately measure the magnitude-phase characteristics of antenna, and instruct quickly antennaDevelopment and improvement, above-mentioned two kinds of methods all can not meet these requirements simultaneously.
Summary of the invention
The object of the invention is: propose a kind of measuring period short, measure efficiency and the high antenna of certainty of measurementAmplitude and phase pattern measuring method.
Technical scheme of the present invention is: the measuring method of a kind of antenna amplitude and phase pattern, and based on oneIndividual by shielded anechoic chamber, Target Aerial Array, three-axle table, Target Aerial Array calibration system, control module, standardThe radio frequency simulation laboratory of signal source and distributor composition; Target Aerial Array, three-axle table and Target Aerial Array schoolBarebone is arranged in shielded anechoic chamber, and control module, standard signal source and distributor are positioned at shielded anechoic chamberOutside, the Target Aerial Array two ends that are arranged on shielded anechoic chamber relative to three-axle table, measured antenna is arranged onOn three-axle table, ensure that the front geometric center of measured antenna overlaps with the center of rotation of three-axle table,The signal output part of measured antenna connects by the aerial signal input of cable and Target Aerial Array calibration systemConnect, the control signal input of three-axle table is by the turntable control signal output of cable and control moduleConnect, Target Aerial Array calibration system is connected with control module by cable, the synchronizing signal of standard signal sourceOutput is connected with the synchronous signal input end of Target Aerial Array calibration system by cable, standard signal sourceRadiofrequency signal output is connected with the input of distributor by cable, and distributor is divided into two by radiofrequency signalRoad, the cable of leading up to is connected with the radio frequency reference signal input part of Target Aerial Array calibration system, another roadBe connected with Target Aerial Array by cable; It is characterized in that, measure the step of antenna amplitude and phase patternAs follows:
1, radiation target signal: control criterion signal source is radiating antenna side on the optional position of Target Aerial ArrayMeasure the horizontal or vertical polarized signal of outline assigned frequency to figure;
2, determine the electric axis zero-bit of measured antenna, electric axis zero-bit refers to the electric axis aligning spoke of measured antennaCorresponding turntable angle while penetrating echo signal:
First, determine the electric axis zero-bit of measured antenna in aximuthpiston: control three-axle table in orientationIn plane, scan, measure measured antenna by Target Aerial Array calibration system simultaneously with signal or orientationDifference signal also calculates and the amplitude ratio of reference signal, find out with the Amplitude Ratio of signal and reference signalThe Amplitude Ratio minimum of a value of large value or gun parallax signal and reference signal, records this maximum or minimum of a value correspondenceThe orientation angles of three-axle table, this three-axle table orientation angles is measured antenna in aximuthpistonElectric axis zero-bit; Then, use the same method and determine the electric axis zero-bit of measured antenna in pitch plane;
3, calibrate the polarization plane of measured not line: control three-axle table in the motion of roll direction, use simultaneouslyTarget Aerial Array calibration system measure measured antenna with signal and calculate and the Amplitude Ratio of reference signalValue, finds out and the Amplitude Ratio maximum of signal and reference signal, records three-axle table corresponding to this maximumRoll angle, this three-axle table roll angle is the polarization plane corresponding angle of measured antenna; IfThe roll angle of putting three-axle table is the polarization plane corresponding angle of the measured antenna that records, rotates three axlesTurntable, makes the polarised direction of measured antenna identical with radiation signal polarised direction; That is: work as radiation signalDuring for vertical polarization, the pitch plane of the corresponding turntable of the E face of antenna, the aximuthpiston of the corresponding turntable of H face;In the time that radiation signal is horizontal polarization, the aximuthpiston of the corresponding turntable of the E face of antenna, the corresponding turntable of H facePitch plane;
4, measure measured not line with the aximuthpiston of three-axle table amplitude on corresponding polarization plane andPhase pattern, is below called aximuthpiston by this polarization plane;
4.1, calculate the angular range of three-axle table scanning: the orientation specifying by antenna pattern measurement outlineThe take measurement of an angle minimum of a value of scope of plane pattern deducts the electric axis zero-bit of measured antenna in aximuthpistonCorresponding angle, then deduct the surplus of 1 °～5 °, obtain the angle of three-axle table in aximuthpiston interscanStated range minimum; The aximuthpiston pattern measurement angular range specifying by antenna pattern measurement outlineLarge value deducts measured antenna electric axis zero-bit corresponding angle in aximuthpiston, add 1 °～5 ° more thanAmount, obtains the angular range maximum of three-axle table in aximuthpiston interscan; According to three-axle table in sideThe minimum of a value of bit plane interscan angular range and maximum determine that three-axle table is in aximuthpiston interscanAngular range;
4.2, calculate the sweep speed of three-axle table: the three-axle table calculating by step 4.1 is flat in orientationThe angular range of face interscan, divided by the measuring period of Target Aerial Array calibration system, obtains three-axle table in sideSweep speed in bit plane;
4.3, adjust the initial position of three-axle table: the azimuth of controlling three-axle table is pointed in aximuthpistonThe angular range minimum of a value of scanning; The angle of pitch of controlling three-axle table points to measured antenna at pitch planeInterior electric axis zero-bit;
4.4, the parameter of three axle band platforms is set: according to the result of calculation of step 4.1 and 4.2, three axles are set and turnSweep limits and the sweep speed of platform in aximuthpiston;
4.5, carrying out amplitude and phase pattern measures: by measured antenna with signal output part by electricityCable is connected with the aerial signal input of Target Aerial Array calibration system, controls three-axle table according to step 4.4The parameter arranging scans in aximuthpiston, controls Target Aerial Array calibration system simultaneously and measures;Target Aerial Array calibration system measure measured antenna with signal and calculate with the Amplitude Ratio of reference signal andPhase difference, carries out record, obtain measured antenna aximuthpiston with pattern measurement data; Work as quiltWhen the installation direction of measurement antenna is identical with actual installation direction in radar, by the side of measured antennaPotentiometer signal output is connected with the aerial signal input of Target Aerial Array calibration system by cable, targetArray calibration system measure the gun parallax signal of measured antenna and calculate with the Amplitude Ratio of reference signal andPhase difference, carries out record, obtains the gun parallax pattern measurement data of measured antenna; When measured dayWhen the installation direction of line is vertical with actual installation direction in radar, by the trim letter of measured antennaNumber output is connected with the aerial signal input of Target Aerial Array calibration system by cable, Target Aerial Array schoolBarebone is measured the trim signal of measured antenna and is calculated and Amplitude Ratio and the phase place of reference signalPoor, carry out record, obtain the trim pattern measurement data of measured antenna;
4.6, data processing: all will deduct this for each the group amplitude pattern measurement data measuringThe maximum of group data is normalized, by the amplitude pattern measurement data after normalized and three axlesThe scanning angle of turntable draws normalized amplitude pattern; By the phase data recording and three-axle tableScanning angle draw phase pattern;
5, use the method same with step 4 to obtain amplitude and the phase directional of measured antenna at pitch planeFigure.
Advantage of the present invention is: measuring period is short, measures efficiency and certainty of measurement high. Can be efficient, accurateThe magnitude-phase characteristics of antenna is measured on ground, instructs quickly development and the improvement of antenna. Evidence,Compared with Planar Near-Field Measurement method, measurement efficiency of the present invention has improved more than 40 times.
Brief description of the drawings
Fig. 1 is the structural representation of implementing radio frequency simulation laboratory of wanting required for the present invention.
Fig. 2 is the measurement result figure of one embodiment of the invention. Abscissa represents angle, and ordinate representsAmplitude, in figure, curve is the E face normalization amplitude pattern of radio frequency simulation laboratory measurement antenna.
Detailed description of the invention
Below the present invention is described in further details. Referring to Fig. 1, a kind of antenna amplitude and phase patternMeasuring method, based on one by shielded anechoic chamber 2, Target Aerial Array 3, three-axle table 4, Target Aerial Array schoolThe radio frequency simulation laboratory that Barebone 5, control module 6, standard signal source 7 and distributor 8 form; OrderMark array 3, three-axle table 4 and Target Aerial Array calibration system 5 are arranged in shielded anechoic chamber 2, control module6, standard signal source 7 and distributor 8 are positioned at the outside of shielded anechoic chamber 2, Target Aerial Array 3 and three-axle table4 are arranged on the two ends of shielded anechoic chamber 2 relatively, and measured antenna 1 is arranged on three-axle table 4, ensure quiltThe front geometric center of measuring antenna 1 overlaps with the center of rotation of three-axle table 4, measured antenna 1Signal output part is connected with the aerial signal input of Target Aerial Array calibration system 5 by cable, and three axles turnThe control signal input of platform 4 is connected with the turntable control signal output of control module 6 by cable,Target Aerial Array calibration system 5 is connected with control module 6 by cable, the synchronizing signal of standard signal source 7Output is connected with the synchronous signal input end of Target Aerial Array calibration system 5 by cable, standard signal source 7Radiofrequency signal output be connected with the input of distributor 8 by cable, distributor 8 is by radiofrequency signalBe divided into two-way, the cable of leading up to is connected with the radio frequency reference signal input part of Target Aerial Array calibration system 5,The cable of separately leading up to is connected with Target Aerial Array 3; It is characterized in that, measure antenna amplitude and phase directionalThe step of figure is as follows:
1, radiation target signal: control criterion signal source 7 is radiation sky on the optional position of Target Aerial Array 3The horizontal or vertical polarized signal of line pattern measurement outline assigned frequency;
2, the electric axis zero-bit of determining measured antenna 1, electric axis zero-bit refers to the electric axis pair of measured antenna 1Corresponding turntable angle when accurate radiation target signal:
First, determine the electric axis zero-bit of measured antenna 1 in aximuthpiston: control three-axle table 4 and existIn aximuthpiston, scan, simultaneously with Target Aerial Array calibration system 5 measure measured antenna 1 and letterNumber or gun parallax signal calculating and the amplitude ratio of reference signal, find out with signal and reference signalThe Amplitude Ratio minimum of a value of Amplitude Ratio maximum or gun parallax signal and reference signal, records this maximum orThe orientation angles of three-axle table 4 corresponding to little value, these three-axle table 4 orientation angles are measured antenna 1Electric axis zero-bit in aximuthpiston; Then, use the same method and determine that measured antenna 1 is flat in pitchingElectric axis zero-bit in face;
3, calibrate the polarization plane of measured antenna 1: control three-axle table 4 in the motion of roll direction, withTime measure measured antenna 1 by Target Aerial Array calibration system 5 with signal and calculate with reference signalAmplitude ratio, finds out and the Amplitude Ratio maximum of signal and reference signal, record this maximum corresponding threeThe roll angle of axle turntable 4, these three-axle table 4 roll angles are the polarization plane of measured antenna 1Corresponding angle; The roll angle that three-axle table 4 is set is the polarization plane pair of the measured antenna 1 that recordsAnswer angle, rotate three-axle table 4, make the polarised direction and radiation signal polarised direction phase of measured antenna 1With; That is: in the time that radiation signal is vertical polarization, the pitch plane of the corresponding turntable of the E face of antenna, H facesAnswer the aximuthpiston of turntable; In the time that radiation signal is horizontal polarization, the orientation of the corresponding turntable of the E face of antennaPlane, the pitch plane of the corresponding turntable of H face;
4, measure measured antenna 1 with the aximuthpiston of three-axle table 4 width on corresponding polarization planeDegree and phase pattern, be below called aximuthpiston by this polarization plane;
4.1, calculate the angular range that three-axle table 4 scans: the side specifying by antenna pattern measurement outlineThe minimum of a value of bit plane pattern measurement angular range deducts the electric axis of measured antenna 1 in aximuthpistonZero-bit corresponding angle, then deduct the surplus of 1 °～5 °, obtain three-axle table 4 in aximuthpiston interscanAngular range minimum of a value; The aximuthpiston pattern measurement angle specifying by antenna pattern measurement outlineScope maximum deducts measured antenna 1 electric axis zero-bit corresponding angle in aximuthpiston, add 1 °～The surplus of 5 °, obtains the angular range maximum of three-axle table 4 in aximuthpiston interscan; According to three axlesTurntable 4 determines that in minimum of a value and the maximum of aximuthpiston interscan angular range three-axle table 4 is in orientationThe angular range of plane interscan;
4.2, calculate the sweep speed of three-axle table 4: the three-axle table 4 calculating by step 4.1 is in sideThe angular range of bit plane interscan, divided by the measuring period of Target Aerial Array calibration system 5, obtains three axles and turnsThe sweep speed of platform 4 in aximuthpiston;
4.3, adjust the initial position of three-axle table 4: the sensing orientation, azimuth of controlling three-axle table 4 is flatThe angular range minimum of a value of face interscan; The angle of pitch of controlling three-axle table 4 points to measured antenna 1 and existsElectric axis zero-bit in pitch plane;
4.4, the parameter of three-axle table 4 is set: according to the result of calculation of step 4.1 and 4.2, three axles are setSweep limits and the sweep speed of turntable 4 in aximuthpiston;
4.5, carrying out amplitude and phase pattern measures: by passing through with signal output part of measured antenna 1Cable is connected with the aerial signal input of Target Aerial Array calibration system 5, controls three-axle table 4 according to stepRapid 4.4 parameters that arrange scan in aximuthpiston, control Target Aerial Array calibration system 5 simultaneously and enterRow is measured; Target Aerial Array calibration system 5 measure measured antenna 1 with signal and calculate and with reference to letterNumber Amplitude Ratio and phase difference, carry out record, obtain measured antenna 1 aximuthpiston and directional diagramMeasurement data; In the time that the installation direction of measured antenna 1 is identical with actual installation direction in radar,By the gun parallax signal output part of measured antenna 1 by the antenna of cable and Target Aerial Array calibration system 5Signal input part connects, and Target Aerial Array calibration system 5 is measured gun parallax signal the meter of measured antenna 1Calculate and Amplitude Ratio and the phase difference of reference signal, carry out record, obtain the gun parallax of measured antenna 1Pattern measurement data; When the installation direction of measured antenna 1 hangs down with actual installation direction in radarWhen straight, by the trim signal output part of measured antenna 1 by cable and Target Aerial Array calibration system 5Aerial signal input connect, Target Aerial Array calibration system 5 is measured the trim letter of measured antenna 1Number and calculate and Amplitude Ratio and the phase difference of reference signal, carry out record, obtain measured antenna 1Trim pattern measurement data;
4.6, data processing: all will deduct this for each the group amplitude pattern measurement data measuringThe maximum of group data is normalized, by the amplitude pattern measurement data after normalized and three axlesThe scanning angle of turntable 4 draws normalized amplitude pattern; Turned by the phase data recording and three axlesThe scanning angle of platform 4 draws phase pattern;
5, use the method same with step 4 to obtain amplitude and the phase place side of measured antenna 1 at pitch planeXiang Tu.
Embodiment
In one embodiment of the present of invention, the equipment in composition radio frequency simulation laboratory is all finished parts.
1, radiation target signal: control criterion signal source 7 is radiation sky on the center of Target Aerial Array 3The vertical polarization signal of line pattern measurement outline assigned frequency;
2, determine the electric axis zero-bit of measured antenna 1: control three-axle table 4 and sweep in aximuthpistonRetouch, measure the gun parallax signal of measured antenna 1 by Target Aerial Array calibration system 5 simultaneously and calculate withThe amplitude ratio of reference signal, finds out the Amplitude Ratio minimum of a value of gun parallax signal and reference signal, this minimumThe orientation angles that is worth corresponding three-axle table 4 is-1.6989 °, obtains measured antenna 1 at aximuthpistonInterior electric axis zero-bit is-1.6989 °; Use the same method determine measured antenna 1 in pitch planeElectric axis zero-bit be-0.0180 °;
3, calibrate the polarization plane of measured antenna 1: control three-axle table 4 in the motion of roll direction, withTime measure measured antenna 1 by Target Aerial Array calibration system 5 with signal and calculate with reference signalAmplitude ratio, finds out and the Amplitude Ratio maximum of signal and reference signal, and three axles corresponding to this maximum turnThe roll angle of platform 4 is-22.5 °, and the polarization plane corresponding angle that obtains measured antenna 1 is-22.5°; The roll angle that three-axle table 4 is set is the polarization plane corresponding angle of the measured antenna 1 that records-22.5 °, rotate three-axle table 4, make polarised direction and the radiation signal polarised direction of measured antenna 1Identical, now the E face of measured antenna is pitch plane;
4, measure E face amplitude and the phase pattern of measured antenna 1;
4.1, calculate the angular range that three-axle table 4 scans: the antenna that antenna pattern measurement outline specifiesE face pattern measurement angular range is ± 9 °, adds ± surplus of 1 °, calculates three-axle table 4 and is bowingThe angular range of facing upward plane interscan is-10.018 °～9.982 °;
4.2, calculate the sweep speed of three-axle table 4: obtain three-axle table 4 by step 4.1 flat in pitchingThe angular range of face interscan is 20 °, and be 54s the measuring period of Target Aerial Array calibration system 5, calculatesThe sweep speed that obtains three-axle table 4 is 0.370 °/s;
4.3, adjust the initial position of three-axle table 4: the azimuth of controlling three-axle table 4 points to-1.6989°, the angle of pitch point to-10.018 °;
4.4, the parameter of three-axle table 4 is set: the sweep speed of three-axle table 4 in pitch plane is setBe 0.370 °/s, sweep limits is-10.018 °～9.982 °;
4.5, carrying out amplitude and phase pattern measures: by passing through with signal output part of measured antenna 1Cable is connected with the aerial signal input of Target Aerial Array calibration system 5, controls three-axle table 4 according to stepRapid 4.4 parameters that arrange scan in pitch plane, control Target Aerial Array calibration system 5 simultaneously and enterRow is measured; Target Aerial Array calibration system 5 measure measured antenna 1 with signal and calculate and with reference to letterNumber Amplitude Ratio and phase difference, carry out record, obtain the E face pattern measurement data of measured antenna 1;
4.6, data processing: all will deduct these group data for measuring amplitude pattern measurement dataMaximum is normalized, by the amplitude pattern measurement data after normalized and three-axle table 4Scanning angle draws normalized amplitude pattern.
The measurement data measuring is as following table:
This measuring method of measurement shows is correctly feasible, and automatic measurement, measures the width of specifying frequencyDegree and phase pattern used time are less than 2 minutes, meet engineering demand.
Claims (1)
1. a measuring method for antenna amplitude and phase pattern, based on one by shielded anechoic chamber [2],Target Aerial Array [3], three-axle table [4], Target Aerial Array calibration system [5], control module [6], standard letterThe radio frequency simulation laboratory of number source [7] and distributor [8] composition; Target Aerial Array [3], three-axle table [4] andTarget Aerial Array calibration system [5] is arranged in shielded anechoic chamber [2], control module [6], standard signal source [7]And distributor [8] is positioned at the outside of shielded anechoic chamber [2], Target Aerial Array [3] installation relative to three-axle table [4]At the two ends of shielded anechoic chamber [2], it is upper that measured antenna [1] is arranged on three-axle table [4], ensures measured dayThe front geometric center of line [1] overlaps with the center of rotation of three-axle table [4], the signal of measured antenna [1]Output is connected with the aerial signal input of Target Aerial Array calibration system [5] by cable, three-axle table [4]Control signal input be connected with the turntable control signal output of control module [6] by cable, targetArray calibration system [5] is connected with control module [6] by cable, and the synchronizing signal of standard signal source [7] is defeatedGo out end and be connected with the synchronous signal input end of Target Aerial Array calibration system [5] by cable, standard signal source [7]Radiofrequency signal output be connected with the input of distributor [8] by cable, distributor [8] is believed radio frequencyNumber be divided into two-way, the radio frequency reference signal input part of cable and Target Aerial Array calibration system [5] of leading up to connectsConnect, the cable of separately leading up to is connected with Target Aerial Array [3]; It is characterized in that, measure antenna amplitude and phase placeThe step of directional diagram is as follows:
1.1, radiation target signal: control criterion signal source [7] spoke on the optional position of Target Aerial Array [3]Penetrate the horizontal or vertical polarized signal of the large steel assigned frequency of antenna pattern measurement;
1.2, the electric axis zero-bit of determining measured antenna [1], electric axis zero-bit refers to the electricity of measured antenna [1]Corresponding turntable angle when axle is aimed at radiation target signal:
First, determine the electric axis zero-bit of measured antenna [1] in aximuthpiston: control three-axle table [4]In aximuthpiston, scan, use Target Aerial Array calibration system [5] to measure measured antenna [1] simultaneouslyWith signal or gun parallax signal and calculate and the amplitude ratio of reference signal, find out and signal with reference to letterNumber Amplitude Ratio maximum or the Amplitude Ratio minimum of a value of gun parallax signal and reference signal, record this maximumOr the orientation angles of three-axle table [4] corresponding to minimum of a value, this three-axle table [4] orientation angles is testedThe electric axis zero-bit of amount antenna [1] in aximuthpiston; Then, use the same method and determine measured antenna [1]Electric axis zero-bit in pitch plane;
1.3, calibrate the polarization plane of measured antenna [1]: control three-axle table [4] in the motion of roll direction,Use that Target Aerial Array calibration system [5] measures measured antenna [1] simultaneously with signal and calculate and with reference to letterNumber amplitude ratio, find out and the Amplitude Ratio maximum of signal and reference signal, record this maximum correspondenceThe roll angle of three-axle table [4], this three-axle table [4] roll angle is the utmost point of measured antenna [1]Change plane corresponding angle; The roll angle that three-axle table [4] is set is the utmost point of the measured antenna [1] that recordsChange plane corresponding angle, rotate three-axle table [4], make polarised direction and the radiation letter of measured antenna [1]Number polarised direction is identical; That is: in the time that radiation signal is vertical polarization, the bowing of the corresponding turntable of the E face of antennaFace upward plane, the aximuthpiston of the corresponding turntable of H face; In the time that radiation signal is horizontal polarization, the E of antenna facesAnswer the aximuthpiston of turntable, the pitch plane of the corresponding turntable of H face;
1.4, measure measured antenna [1] with on the corresponding polarization plane of aximuthpiston institute of three-axle table [4]Amplitude and phase pattern, below this polarization plane is called to aximuthpiston;
1.4.1, calculate the angular range of three-axle table [4] scanning: by antenna pattern measurement outline regulationThe minimum of a value of aximuthpiston pattern measurement angular range deduct measured antenna [1] in aximuthpistonElectric axis zero-bit corresponding angle, then deduct the surplus of 1 °～5 °, obtain three-axle table [4] at aximuthpistonThe angular range minimum of a value of interscan; The aximuthpiston directional diagram specifying by antenna pattern measurement outline is surveyedMeasuring angle scope maximum deducts measured antenna [1] electric axis zero-bit corresponding angle in aximuthpiston, then addsThe surplus of upper 1 °～5 °, obtains the angular range maximum of three-axle table [4] in aximuthpiston interscan;Determine that in minimum of a value and the maximum of aximuthpiston interscan angular range three axles turn according to three-axle table [4]Platform [4] is at the angular range of aximuthpiston interscan;
1.4.2, calculate the sweep speed of three-axle table [4]: the three-axle table calculating with step 1.4.1[4] measuring period divided by Target Aerial Array calibration system [5] at the angular range of aximuthpiston interscan,To the sweep speed of three-axle table [4] in aximuthpiston;
1.4.3, adjust the initial position of three-axle table [4]: the azimuth sensing side that controls three-axle table [4]The angular range minimum of a value of bit plane interscan; The angle of pitch of controlling three-axle table [4] points to measured antenna[1] the electric axis zero-bit in pitch plane;
The parameter of three-axle table [4] 1.4.4, is set: according to the result of calculation of step 1.4.1 and 1.4.2Sweep limits and the sweep speed of three-axle table [4] in aximuthpiston is set;
1.4.5, carrying out amplitude and phase pattern measures: by measured antenna [1] and signal output partBe connected with the aerial signal input of Target Aerial Array calibration system [5] by cable, control three-axle table [4]The parameter arranging according to step 1.4.4 scans in aximuthpiston, controls Target Aerial Array calibration simultaneouslySystem [5] is measured; Target Aerial Array calibration system [5] is measured also calculating with signal of measured antenna [1]Go out and Amplitude Ratio and the phase difference of reference signal, carry out record, obtain measured antenna [1] at aximuthpistonWith pattern measurement data; When the installation direction and actual installation side in radar of measured antenna [1]When identical, by the gun parallax signal output part of measured antenna [1] by cable and Target Aerial Array calibration systemThe aerial signal input of system [5] connects, and Target Aerial Array calibration system [5] is measured the side of measured antenna [1]Potentiometer signal also calculates and Amplitude Ratio and the phase difference of reference signal, carries out record, obtains measured dayThe gun parallax pattern measurement data of line [1]; When the installation direction of measured antenna [1] with actual at radarIn installation direction when vertical, by the trim signal output part of measured antenna [1] by cable and targetThe aerial signal input of array calibration system [5] connects, and Target Aerial Array calibration system [5] is measured measuredThe trim signal of antenna [1] also calculates and Amplitude Ratio and the phase difference of reference signal, carries out record,To the trim pattern measurement data of measured antenna [1];
1.4.6, data processing: all will deduct for each the group amplitude pattern measurement data measuringThe maximum of these group data is normalized, by the amplitude pattern measurement data and three after normalizedThe scanning angle of axle turntable [4] draws normalized amplitude pattern; By the phase data recording and three axlesThe scanning angle of turntable [4] draws phase pattern;
1.5, use the method same with step 1.4 to obtain measured antenna [1] in the amplitude of pitch plane andPhase pattern.
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| CN111812418B (en) * | 2020-07-17 | 2021-09-28 | 中国汽车工程研究院股份有限公司 | Tire pressure monitoring antenna performance testing system and method |
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