CN104391187B - A kind of multifrequency point antenna array calibration equipment and Calibration Method - Google Patents
A kind of multifrequency point antenna array calibration equipment and Calibration Method Download PDFInfo
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- CN104391187B CN104391187B CN201410478001.7A CN201410478001A CN104391187B CN 104391187 B CN104391187 B CN 104391187B CN 201410478001 A CN201410478001 A CN 201410478001A CN 104391187 B CN104391187 B CN 104391187B
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Abstract
The invention belongs to the calibration technical field of radio freqency simulation system aerial array, a kind of multifrequency point antenna array calibration equipment and Calibration Method are disclosed.The multifrequency point antenna array calibration equipment that methods described is used, include calibration control management module, calibration microwave signal source, four loudspeaker reception antennas, receiver module and vector network analyzer, the four loudspeaker reception antenna controls management module to be connected by receiver module, vector network analyzer and calibration, calibration control management module by netting twine respectively with local oscillator microwave signal source, calibration microwave signal source, radio frequency control circuit, being connected etc. by the antenna array management module of calibration antenna array system, the turning table control module of subsidiary equipment constitutes；The present invention can a calibration complete to work to the calibrations of multiple default frequencies and passage, overcome the time consumption in calibration and be added to exponential series increase, the great defect of equipment loss cost with calibration Frequency point.Its is simple in construction, and reliability is high, and manufacturing cost is low.
Description
Technical field
The invention belongs to the calibration technical field of radio freqency simulation system aerial array, it is related to broadband radio freqency simulation system day
Linear array calibration equipment, particularly a kind of multifrequency point antenna array calibration equipment and Calibration Method.
Background technology
Radio freqency simulation system act as in radiant simulation system provide a real electromagnetic signal environment.Radio frequency
Analogue system is realized to thunder by the control to the relative amplitude of triple subarray institute radiation signal and phase in aerial array
Up to the simulation of target location and signal intensity, and according to the simulation of specified signal in designing combat, radio freqency simulation system is completed
The structure of subject equipment electromagnetic signal environment.Therefore, the order of accuarcy of radio freqency simulation system simulated target position synthesis, for quilt
The standby conclusion (of pressure testing) of trial assembly has a major impact.In order to ensure that the synthesis of system simulation target location has enough precision, each
It is required to carry out calibration to the aerial array of radio freqency simulation system before secondary radiant simulation system, so that each array element of antenna array is met
Amplitude-phase consistency requirement, i.e., the amplitude and phase for making each radiating element on whole antenna array by calibration all has identical
A reference value, it is ensured that the phase of three tunnel radiofrequency signals of triple aerial radiation is consistent and amplitude proportional relation meets radiation signal
Space angle requirement, it is ensured that the credibility of Simulation results.And the aerial array scale of universal radio frequency simulation pilot system
Greatly, bay is more, when subject armament-related work frequency is more, it is necessary to a kind of fast antenna battle array calibration equipment be studied, to save mark
The school time.
Existing antenna array calibration equipment related to the present invention is as shown in Figure 1.
Calibration System is by four loudspeaker reception antennas, frequency microwave signal source, local oscillator microwave signal source, receiving module, vector
The compositions such as Network Analyzer, calibration control management module, existing antenna array calibration flow is as shown in Figure 2.
The Calibration System single calibration can only be carried out for single frequency point and single radio frequency passage, and large-scale antenna array is logical
Often include multiple radio-frequency channels and hundreds of array elements, subject equipment is usually operated on multiple frequencies.The then institute of whole antenna array
Time needed for having calibration is：
The calibration of the frequency and a passage of the whole antenna array of Calibration System completion is accomplished by the time of one day or so,
And the frequency number for being tested armament-related work be generally more than ten it is even more many, the calibration before so only testing work be accomplished by it is considerably long
Time, such as whole calibrations of 15 frequencies probably need the time of two wheat harvesting periods, resource are tested in current radio frequency analogue system
In the case of anxiety, this time overhead needs to avoid as far as possible.
The content of the invention
The problem of to solve existing Calibration System calibration overlong time, shorten the radio freqency simulation system antenna array calibration time,
The present invention provides a kind of multifrequency point antenna array calibration equipment and Calibration Method, can realize single multifrequency point calibration, greatly improve
Calibration efficiency.
For achieving the above object, the technical solution adopted by the present invention is：
A kind of multifrequency point antenna array calibration equipment, includes calibration control management module, calibration microwave signal source, local oscillator micro-
Ripple signal source, four loudspeaker reception antennas, receiver module, radio frequency control circuit and vector network analyzer,
The four loudspeaker reception antenna controls management module phase by receiver module, vector network analyzer and calibration
Even, calibration control management module by netting twine respectively with local oscillator microwave signal source, calibration microwave signal source, radio frequency control circuit,
It is connected by the antenna array management module of calibration antenna array system, the turning table control module of subsidiary equipment, constitutes local area network type
Antenna array calibration equipment；
The output end of local oscillator microwave signal source therein is connected by cable with receiver module；Calibration microwave signal source
First output end is connected with receiver module, and the second output end of calibration microwave signal source is connected with radio frequency control circuit, radio frequency
Control circuit output end is connected with by calibration antenna array system.
A kind of multifrequency point antenna array calibration equipment, the calibration controls management module to be to control sum for antenna array calibration
According to the module of processing.
A kind of multifrequency point antenna array calibration equipment, the calibration microwave signal source is micro- for producing aerial array during calibration
The microwave launcher of ripple signal.
A kind of multifrequency point antenna array calibration equipment, the four loudspeaker reception antenna is for receiving antenna array radiated radio frequency (RF) letter
Number the reception antenna with four loudspeaker.
A kind of multifrequency point antenna array calibration equipment, the receiver module is for being mixed to the signal that antenna is received
The microwave receiving device of frequency amplification.
A kind of multifrequency point antenna array calibration equipment, the radio frequency control circuit is for receiving calibration control management module
Port controlling information, control radiofrequency signal is injected into the circuit of the aerial array radio-frequency channel of calibration, includes radio frequency electric and opens
Close and ON-OFF control circuit, radio frequency electric switch input terminal is connected with calibration microwave signal source, radio frequency electric output switching terminal and
It is connected by calibration antenna array system；Radio frequency electric switch input terminal is connected with ON-OFF control circuit output end；ON-OFF control circuit
Input controls management module to be connected by LAN with calibration；ON-OFF control circuit passes through collection by integrated chip LAN91C111
Into chip EP2C35F484 composition is electrically connected with integrated chip 74FCT.
A kind of multifrequency point antenna array calibration equipment, the vector network analyzer be for amplifying to receiver module after
Intermediate-freuqncy signal enters the instrument of line amplitude and phase bit comparison.
A kind of multifrequency point antenna array Calibration Method of utilization multifrequency point antenna array calibration equipment, is in radiant simulation system
It is preceding, it is necessary to according to subject armament-related work frequency antenna array is calibrated, make the radio frequency output signal of antenna array triple antenna
Amplitude-phase consistency requirement is met, the multifrequency point calibration of antenna array includes：The calibration of aerial array initial value, and angle simulation precision are surveyed
Amount is verified with initial value；
1）, aerial array initial value calibration, be that the amplitude of each array element radiation signal of antenna array is surveyed with phase
Amount, generates initial value correction card, implementation step is such as according to the difference of array element radiation signal and reference signal amplitude and phase
Under：
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes initial frequency by calibration
Rate, passage and antenna array element position；
Step 2：Element position is obtained, school control management module is selected to need the antenna array array element of calibration, reads element position
Information；
Step 3：Antenna points to element position, and school controls management module that element position information is sent into turntable management mould
Block, turntable management module is according to the element position information rotating table received, and pointing to reception antenna needs the antenna array of calibration
Element position；
Step 4：Measure and record, calibration control management module control calibration radio-frequency signal source and microwave local oscillator
The signal of selected frequency is produced, the signal that microwave local oscillator is produced delivers to receiver as local oscillation signal all the way, and calibration is penetrated
The signal that frequency source signal is produced reaches aerial array through radio frequency control module by selected passage, and antenna array control module is by signal
It is radiate from selected element position, the radiation signal of four loudspeaker reception antenna receiving antenna arrays delivers to receiver, Ling Yilu
Receiver is delivered to as reference signal, amplitude and phase difference value between measurement antenna array radiation signal and reference signal, and remember
Record measurement data；
Step 5：Frequency judges, if all frequencies set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next frequency, repeat step four are chosen according to default value of frequency point；
Step 6：Passage judges, if all passages set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 5 of repeat step.
Step 7：Array element judges, if all array elements of antenna array have completed measurement, goes to step eight, otherwise, under selecting
The array element of one non-calibration, two ~ step 5 of repeat step；
Step 8：Data processing, for different frequency and passage, chooses in each array element with reference signal Magnitude Difference most
Small array element radiation signal amplitude sets up initial-value table as benchmark；Initial value table is inputted into antenna array control system, control system
The table will be loaded into when antenna array works, the leveling work of the amplitude and phase of antenna array is automatically performed；
2）, angle mould intend precision measure and the verification of Calibration Data, antenna array angle mould intends the school of precision measure and Calibration Data
The function of testing is by measuring the phase that triple aerial signal is synthesized, the width of triple being calibrated according to its phase simulation precision
Consistent property, while verifying the precision that antenna array angle mould is intended, implementation step is as follows：
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes initial frequency by calibration
Rate, passage and triple position；
Step 2：Selected triple, controls management module is selected to need the triple of calibration by calibration, reads its synthesis letter
Number analog angle information；
Step 3：Antenna directional signal position, school controls management module to believe the simulation Angle Position of triple composite signal
Breath is sent to turntable management module, and turntable management module turns according to the simulation angle position information of the triple composite signal received
Dynamic turntable, makes reception antenna point to the position；
Step 4：Measure and record, calibration control management module control calibration radio-frequency signal source and microwave local oscillator
The signal of selected frequency is produced, the signal that microwave local oscillator is produced delivers to receiver as local oscillation signal, calibration radio frequency letter
The signal that number source is produced reaches aerial array through radio frequency control module by selected passage, and antenna array control module is by signal from choosing
Fixed element position is radiate, and the radiation signal of receiving antenna array and delivering to connects respectively for four loudspeaker of four loudspeaker reception antennas
Receipts machine, respectively measurement obtains the phase difference of two electromagnetic horns in orientation and pitch orientation, and records；
Step 5：Double measurement, turntable horizontally rotates 180 °, and measurement again obtains orientation and pitch orientation two loudspeaker day
The phase difference of line, and according to the two groups of phase differences measured, calculating obtains the triple combination into signal imitation Angle Position and setting position
The deviation put；
Step 6：Frequency judges, if all frequencies set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next frequency, four ~ step 5 of repeat step are chosen according to default value of frequency point；
Step 7：Passage judges, if all passages set in calibration control management module have completed measurement, turns step
Rapid eight, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 6 of repeat step；
Step 8：Triple judges, if all triples of antenna array have completed measurement, goes to step nine, otherwise, choosing
Remove a non-calibration triple, two ~ step 6 of repeat step；
Step 9：Data processing, is utilizedCalculating obtains aerial array angle
Simulation error, error amount is compared with given accuracy value, judges whether antenna array simulation angular accuracy meets the requirements.
Due to using technical scheme as described above, the present invention has following superiority：
A kind of multifrequency point antenna array calibration equipment and Calibration Method, this method rely on a kind of multifrequency point antenna array calibration to set
It is standby, can a calibration complete to work to the calibrations of multiple default frequencies and passage, overcome the single-frequency used in background technology
Point calibration scheme, the time consumption in calibration is added to exponential series increase, equipment loss cost pole with calibration Frequency point
Big defect.Its is simple in construction, and reliability is high, and manufacturing cost is low.The multifrequency point antenna array calibration equipment can mainly complete with
Lower function：
（1）To the electrical characteristic of each electrical feed-throughs（Phase delay and power loss）Measure, set up passage length and
The initial value calibration of the correction card of loss, i.e. aerial array；
（2）The test of radio frequency target simulation system angle simulation precision and the verification of calibration value, diagnose array failure.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 be at present antenna array calibration equipment schematic diagram；
Fig. 2 be at present antenna array Calibration Method calibration schematic flow sheet；
Fig. 3 is multifrequency point Calibration System equipment composition frame chart；
Fig. 4 is radio frequency control circuit composition frame chart；
Fig. 5 is phase comparing method measuring principle figure；
Fig. 6 is the figure of multifrequency point calibration deployed with devices one；
Fig. 7 is the figure of multifrequency point calibration deployed with devices two；
Fig. 8 is multifrequency point Calibration Method calibration flow chart；
Fig. 9 is multifrequency point Proofreading Software surface chart；
Figure 10 is the figure of multifrequency point calibration flow one；
Figure 11 is the figure of multifrequency point calibration flow two.
Embodiment
As shown in Fig. 3 to Figure 11, a kind of multifrequency point antenna array calibration equipment includes calibration control management module, calibration
Microwave signal source, local oscillator microwave signal source, four loudspeaker reception antennas, receiver module, radio frequency control circuit and vector network point
Analyzer, the four loudspeaker reception antenna controls management module to be connected by receiver module, vector network analyzer with calibration, marks
School control management module by netting twine respectively with local oscillator microwave signal source, calibration microwave signal source, radio frequency control circuit, by calibration
The antenna array management module of antenna array system, the turning table control module of subsidiary equipment are connected, and constitute local area network type antenna array
Calibration equipment；The output end of local oscillator microwave signal source therein is connected by cable with receiver module；Calibration microwave signal source
The first output end be connected with receiver module, the second output end of calibration microwave signal source is connected with radio frequency control circuit, penetrates
Frequency control circuit output end is connected with by calibration antenna array system.
The equipment needs radio freqency simulation system intermediate station and turntable control computer to aid in completing calibration work.Multifrequency point mark
Calibration equipment mainly completes following functions：
（1）To the electrical characteristic of each electrical feed-throughs（Phase delay and power loss）Measure, set up passage length and
The initial value calibration of the correction card of loss, i.e. aerial array；
（2）The test of radio frequency target simulation system angle simulation precision and the verification of calibration value, diagnose array failure.System group
It is as shown in Figure 3 into block diagram.
The calibration controls management module to be the module for antenna array calibration control and data processing.
The calibration microwave signal source is the microwave launcher for producing aerial array microwave signal during calibration.
The four loudspeaker reception antenna is the reception day with four loudspeaker for receiving antenna array radiated radio frequency (RF) signal
Line.
The receiver module is the microwave receiving device of the signal progress mixing amplification for being received to antenna.
The radio frequency control circuit is the port controlling information that management module is controlled for receiving calibration, controls radiofrequency signal
The circuit of the aerial array radio-frequency channel of calibration is injected into, includes radio frequency electric switch and ON-OFF control circuit, radio frequency electric
Switch input terminal is connected with calibration microwave signal source, and radio frequency electric output switching terminal is connected with by calibration antenna array system；Radio frequency
Electronic switch input is connected with ON-OFF control circuit output end；ON-OFF control circuit input is controlled by LAN and calibration
Management module is connected；ON-OFF control circuit is by integrated chip LAN91C111, integrated chip EP2C35F484, integrated chip 74FCT
Electrical connection composition.Circuit composition frame chart is as shown in Figure 4.
The vector network analyzer enters line amplitude and phase ratio for the intermediate-freuqncy signal after for amplifying to receiver module
Compared with instrument.
The multifrequency point antenna array calibration equipment needs radio freqency simulation system intermediate station and turntable control computer to aid in completing
Calibration works.Its local oscillator microwave signal source：For producing local oscillator reference signal required during calibration.
Calibration control pipe reason module passes through the network equipment and turning table control module, antenna array management module, mark in the present invention
School microwave signal source, local oscillator microwave signal source and vector network analyzer composition LAN, calibration microwave signal source, local oscillator are micro-
Ripple signal source and reception antenna are connected by cable with antenna array and receiver module, and receiver module is sweared by cable connection
Network Analyzer is measured, four loudspeaker reception antennas are placed on turntable, changing antenna according to the rotation of turntable points to.
Calibration control management module during work in the present invention manages computer to antenna array by LAN connection 2 and sent
The passage and Frequency point information of calibration are needed, antenna array management module completes the control of antenna array according to the control information received
System；Calibration controls management module to connect 3 control information selected to radio frequency control circuit sendaisle, calibration control by LAN
Management module processed sends the control information such as signal power, frequency by LAN connection 4 to calibration microwave signal source, controls radio frequency
Signal source presses defined signal power, frequency and produces radiofrequency signal, and the control signal that calibration microwave signal source is produced connects through cable
Connect 6 and enter radio frequency control circuit, control signal is injected antenna array by cable connection 12, controls antenna array by radio frequency control circuit
Radiofrequency signal needed for producing, is received while the radiofrequency signal that calibration microwave signal source is produced can be entered by cable connection 7
Machine module, amplitude and phase bit comparison are completed as reference signal；Calibration controls management module micro- to local oscillator by LAN connection 5
Ripple signal source sends the control information such as signal power, frequency, and control local oscillation signal source produces regulation power and the local oscillator letter of frequency
Number, local oscillation signal enters receiver module by cable connection 8, participates in mixing, the signal that antenna is received is realized into down coversion；
Calibration controls management module to send instrument control information to vector network analyzer by LAN connection 10；Calibration control management
Module sends revolving table position control information by LAN connection 1 to turntable control computer, and turntable control computer is according to mesh
Cursor position information rotating table, turntable drives four loudspeaker reception antennas by physical connection 13, antenna is directed to up to pre-determined bit
Put；Four loudspeaker reception antennas receive the radiation signal from antenna array, enter receiver module by cable connection 9, are carrying out
During accuracy test, the two paths of signals that receiver is received is all from four loudspeaker reception antennas, when carrying out initial value calibration, and receiver is only
Signal all the way is received from antenna, the signal that calibration microwave signal source is produced is coupled out part energy as reference signal, passed through
Cable connection 7 enters receiver module；Two paths of signals is first mixed amplification in receiver module, then passes through the note of cable connection 11
Enter vector network analyzer, the amplitude and phase difference of vector network analyzer measurement two paths of signals, measurement result pass through LAN
Connection 10 is sent to calibration control management module, finally completes Calibration Data processing by calibration control management module, provides calibration
As a result.
A kind of multifrequency point antenna array Calibration Method, be using radiation signal and the reference signal of aerial array directly than width and
Than phase, obtain the amplitude and phase difference value per aerial radiation signal and reference signal all the way, that is, obtain amplitude between signal with
Phase relative difference, by compensating the difference that measurement is obtained, completes the calibration of aerial array initial value.The survey of aerial array precision
Amount is completed according to the phase comparing method of phase-interferometer principle, and the accuracy value based on measurement completes the verification of initial value.
Radiation element off-design position is inconsistent by the amplitude and phase for causing receiver module two paths of signals, and two-way is believed
The size and offsets in proportion of number amplitude and phase difference value.Therefore, carried out using the difference of two paths of signals amplitude and phase
The measurement and the verification of initial value of antenna array control angular accuracy after calibration.
The principle of antenna array control precision measure is referring to shown in phase comparing method measuring principle Fig. 5.Loudspeaker are received in four electromagnetic horns
The distance between A, B are d,θFor array radiation direction and the angle for receiving loudspeaker axis direction, i.e. signal imitation angle error, penetrate
Frequency signal wavelength is λ, then the path length difference of the radiofrequency signal of two passages and the phase difference brought are：
Path length difference：
Phase difference：
θAngle is less than triple antenna angle, and triple antenna angle value very little, under normal circumstancesφThe cycle will not be produced
It is fuzzy, therefore：
It is specific implement to be carried out by multifrequency point antenna array calibration equipment, it is necessary to root before radiant simulation system
Antenna array is calibrated according to subject armament-related work frequency, the radio frequency output signal of antenna array triple antenna is met width phase one
Cause property requires that such as Fig. 8 is multifrequency point Calibration Method calibration flow chart, and Fig. 9 is multifrequency point Proofreading Software surface chart；Antenna array it is many
Frequency calibration includes two stages：The calibration of aerial array initial value, and angle mould are intended precision measure and verified with initial value；
1）, aerial array initial value calibration,
In the calibration stage of aerial array initial value, the deployment one of calibration equipment is as shown in Figure 6.By calibration control management mould
Block, calibration management computer, turntable control computer, calibration radio-frequency signal source, microwave local oscillator and vector network point
Analyzer constitutes LAN by the network equipment, and microwave radio signal is connected by cable with feed control with antenna array, four loudspeaker
Antenna, calibration radio-frequency signal source and microwave local oscillator are connected by cable with receiver module, and receiver module passes through electricity
Cable is connected with vector network analyzer.
Aerial array initial value calibration flow one is as shown in Figure 10.
The effect of the initial value calibration of aerial array is that the amplitude of each array element radiation signal of antenna array is surveyed with phase
Amount, generates initial value correction card according to the difference of array element radiation signal and reference signal amplitude and phase, is system shape first
State is determined, reception antenna is fixed on antenna rotating platform, connecting device each several part, confirms that the connection of calibration equipment each several part is normal,
It is working properly.
It is comprised the following steps that：
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes initial frequency by calibration
Rate, passage and antenna array element position；I.e. by controlling the Proofreading Software in management module to set the default frequency of this calibration
（Can be multiple frequencies）And passage.
Step 2：Calibration is carried out, and turntable center is aligned to the array element that need to be calibrated（Now reception antenna alignment needs calibration
Array element）, each signal source transmission signal travels through default frequency and passage, obtains element position, school control management module is selected to be needed
The antenna array array element of calibration, reads element position information；
Step 3：Antenna points to element position, and school controls management module that element position information is sent into turntable management mould
Block, turntable management module is according to the element position information rotating table received, and pointing to reception antenna needs the antenna array of calibration
Element position；
Step 4：Measure and record, calibration control management module control calibration radio-frequency signal source and microwave local oscillator
The signal of selected frequency is produced, the signal that microwave local oscillator is produced delivers to receiver as local oscillation signal all the way, and calibration is penetrated
The signal that frequency source signal is produced reaches aerial array through radio frequency control module by selected passage, and antenna array control module is by signal
It is radiate from selected element position, the radiation signal of four loudspeaker reception antenna receiving antenna arrays delivers to receiver, Ling Yilu
Receiver is delivered to as reference signal, amplitude and phase difference value between measurement antenna array radiation signal and reference signal, and remember
Record measurement data；Array element radiation signal is sent out with calibration radio-frequency signal source under all frequencies and array element that i.e. record system measurement is obtained
Difference between the reference signal amplitude penetrated.
Step 5：Frequency judges, if all frequencies set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next frequency, repeat step four are chosen according to default value of frequency point；
Step 6：Passage judges, if all passages set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 5 of repeat step.
Step 7：Array element judges, if all array elements of antenna array have completed measurement, goes to step eight, otherwise, under selecting
The array element of one non-calibration, two ~ step 5 of repeat step；Until all array element measurements of antenna array are finished.
Step 8：Data processing, for different frequency and passage, chooses in each array element with reference signal Magnitude Difference most
Small array element radiation signal amplitude sets up initial-value table as benchmark；Initial value table is inputted into antenna array control system, control system
The table will be loaded into when antenna array works, the amplitude leveling work of antenna array is automatically performed；
2）, angle mould intend precision measure and the verification of Calibration Data
The checking stage of the measurement of simulation precision and initial value at angle, the deployment two of calibration equipment is as shown in Figure 7.By calibration
Control management module, antenna array management computer, turntable control computer, calibration radio-frequency signal source, microwave local oscillator with
And vector network analyzer constitutes LAN by the network equipment, microwave radio signal passes through cable and feed control and antenna array
Connection, four electromagnetic horns and microwave local oscillator be connected by cable with receiver module, receiver module by cable and
Vector network analyzer is connected.
Aerial array angle mould intends precision measure and initial value calibration workflow two is as shown in figure 11.
The function of the verification of antenna array angle simulation precision is believed by measuring the triple antenna of calibration device antenna position
Number synthesis phase, calibrate the amplitude-phase consistency of triple according to its phase simulation precision, at the same verify antenna array mimotope
The precision put, the i.e. measurement of antenna array angle simulation precision is to determine mesh by measuring the phase difference of triple antenna composite signal
The direction reached is marked, the error amount of target location simulation is obtained, and the target location simulation error obtained according to measurement is completed just
The verification of initial value, carries out system mode determination, reception antenna is fixed on antenna rotating platform, connecting device each several part, really first
Recognize the connection of calibration equipment each several part normal, it is working properly.Its specific implementation step is as follows.
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes initial frequency by calibration
Rate, passage and triple position；Control the Proofreading Software in management module that the default frequency of this calibration is set by calibration
（Can be multiple）And passage.
Step 2：Selected triple, controls management module is selected to need the triple of calibration by calibration, reads its synthesis letter
Number simulation angle position information；
Step 3：Antenna directional signal position, carries out calibration；Calibration controls management module by the mould of triple composite signal
Intend angle position information and be sent to turntable management module, turntable management module is according to the simulation angle of the triple composite signal received
Positional information rotating table, makes reception antenna point to the position；
Step 4：Measure and record, turntable center is aligned to the triple analog signal Angle Position that need to be calibrated（Now receive
Antenna alignment needs the triple analog signal Angle Position of calibration）, each signal source radiation signal, the institute that record system measurement is obtained
There is the phase difference of two electromagnetic horns in orientation and pitch orientation under passage and frequency；
Calibration control management module control calibration radio-frequency signal source and microwave local oscillator produce the signal of selected frequency,
The signal that microwave local oscillator is produced delivers to receiver as local oscillation signal, and the signal that calibration radio-frequency signal source is produced is through radio frequency
Control module reaches aerial array by selected passage, and antenna array control module gives off signal from selected element position
Go, four loudspeaker of four loudspeaker reception antennas the radiation signal of receiving antenna array and deliver to receiver respectively, and measurement respectively is obtained
The phase difference of two electromagnetic horns in orientation and pitch orientation, and record；
Step 5：Double measurement, antenna rotating platform horizontally rotates 180 °, and measurement again obtains two loudspeakers in orientation and pitch orientation
The phase difference of antenna, and according to the two groups of phase differences measured, calculating obtains the triple combination into signal imitation Angle Position with setting
Position the deviation put；
Step 6：Frequency judges, if all frequencies set in calibration control management module have completed measurement, turns step
Rapid seven, otherwise, next frequency, four ~ step 5 of repeat step are chosen according to default value of frequency point；
Step 7：Passage judges, if all passages set in calibration control management module have completed measurement, turns step
Rapid eight, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 6 of repeat step；
Step 8：Triple judges, if all triples of antenna array have completed measurement, goes to step nine, otherwise, choosing
A non-calibration triple is removed, the simulation angle position information of its composite signal, two ~ step 6 of repeat step is set；Until antenna
All triple measurements in battle array are finished.
Step 9：Data processing, is utilizedCalculating obtain triple combination into
Signal imitation angle error, error amount is compared with given accuracy value, judges antenna array triple combination into signal imitation angle
Whether precision meets the requirements.
The present invention is direct than width and than phase with reference signal using the radiation signal of aerial array, obtains per antenna spoke all the way
The amplitude and phase difference value of signal and reference signal are penetrated, that is, obtains amplitude and phase relative difference between signal, passes through compensation
Obtained difference is measured, the calibration of aerial array initial value is completed；The beasurement base phase-interferometer principle of aerial array precision
Phase comparing method complete, accuracy value based on measurement completes the verification of initial value；The principle of antenna array control angular accuracy measurement is referring to Fig. 6
It is shown.
It is d that the distance between loudspeaker A, B are received in four electromagnetic horns,θIt is array radiation direction and reception loudspeaker axis side
To angle, radiofrequency signal wavelength is λ, then the path length difference of the radiofrequency signal of two passages and the phase difference brought are：
Path length difference：
Phase difference：
θAngle is less than triple antenna angle, and triple antenna angle value very little, under normal circumstancesφThe cycle will not be produced
It is fuzzy, therefore：
。
Claims (7)
1. a kind of multifrequency point antenna array Calibration Method, the multifrequency point antenna array calibration equipment of use, include calibration control management
Module, calibration microwave signal source, local oscillator microwave signal source, four loudspeaker reception antennas, receiver module, radio frequency control circuit and arrow
Network Analyzer is measured, the four loudspeaker reception antenna passes through receiver module, vector network analyzer and calibration control management mould
Block is connected, and calibration controls management module to control electricity with local oscillator microwave signal source, calibration microwave signal source, radio frequency respectively by netting twine
Road, it is connected by the antenna array management module of calibration antenna array system, the turning table control module of subsidiary equipment, constitutes LAN
Linear (antenna) array calibration equipment；The output end of local oscillator microwave signal source therein is connected by cable with receiver module；Calibration is micro-
First output end of ripple signal source is connected with receiver module, the second output end and radio frequency control circuit of calibration microwave signal source
It is connected, radio frequency control circuit output end is connected with by calibration antenna array system；It is characterized in that：Be before radiant simulation system,
Need to calibrate antenna array according to subject armament-related work frequency, meet the radio frequency output signal of antenna array triple antenna
Amplitude-phase consistency requirement, the multifrequency point calibration of antenna array includes：The calibration of aerial array initial value, and angle mould intend precision measure with
Initial value is verified；
1）, aerial array initial value calibration, be that the amplitude of each array element radiation signal of antenna array is measured with phase, root
Initial value correction card is generated according to the difference of array element radiation signal and reference signal amplitude and phase, implementation step is as follows：
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes original frequency, leads to by calibration
Road and antenna array element position；
Step 2：Element position is obtained, school control management module is selected to need the antenna array array element of calibration, reads element position letter
Breath；
Step 3：Antenna points to element position, and element position information is sent to turntable management module, turned by school control management module
Platform management module is according to the element position information rotating table received, and pointing to reception antenna needs the antenna array array element position of calibration
Put；
Step 4：Measure and record, calibration control management module control calibration radio-frequency signal source and microwave local oscillator are produced
The signal of selected frequency, the signal that microwave local oscillator is produced delivers to receiver as local oscillation signal, calibration radio frequency letter all the way
The signal that number source is produced reaches aerial array through radio frequency control module by selected passage, and antenna array control module is by signal from choosing
Fixed element position is radiate, and the radiation signal of four loudspeaker reception antenna receiving antenna arrays delivers to receiver, and another road is delivered to
Receiver is as reference signal, amplitude and phase difference value between measurement antenna array radiation signal and reference signal, and records survey
Measure data；
Step 5：Frequency judges, if all frequencies set in calibration control management module have completed measurement, goes to step
Seven, otherwise, next frequency, repeat step four are chosen according to default value of frequency point；
Step 6：Passage judges, if all passages set in calibration control management module have completed measurement, goes to step
Seven, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 5 of repeat step;
Step 7：Array element judge, if all array elements of antenna array completed measurement, go to step eight, otherwise, select it is next not
The array element of calibration, two ~ step 5 of repeat step；
Step 8：Data processing, for different frequency and passage, chooses minimum with reference signal Magnitude Difference in each array element
Array element radiation signal amplitude sets up initial-value table as benchmark；Initial value table is inputted into antenna array control system, control system will be
Antenna array is loaded into the table when working, and is automatically performed the leveling work of the amplitude and phase of antenna array；
2）, angle mould intend precision measure and the verification of Calibration Data, antenna array angle mould intends precision measure and the verification of Calibration Data
Function is to measure the precision that antenna array angle mould is intended by phase comparing method, and the correctness of initial value is judged according to the precision of simulation, complete
Into the verification of Calibration Data;Implementation step is as follows：
Step one：Parameter setting, controls management module to set the frequency and passage of calibration, selectes original frequency, leads to by calibration
Road and triple position；
Step 2：Selected triple, controls management module is selected to need the triple of calibration, reads its composite signal by calibration
Simulate angle position information；
Step 3：Antenna directional signal position, school controls management module to send out the simulation angle position information of triple composite signal
Turntable management module is given, turntable management module is rotated according to the simulation angle position information of the triple composite signal received to be turned
Platform, makes reception antenna point to the position；
Step 4：Measure and record, calibration control management module control calibration radio-frequency signal source and microwave local oscillator are produced
The signal of selected frequency, the signal that microwave local oscillator is produced delivers to receiver as local oscillation signal, calibration radio-frequency signal source
The signal of generation reaches aerial array through radio frequency control module by selected passage, and antenna array control module is by signal from selected
Element position is radiate, and four loudspeaker of four loudspeaker reception antennas the radiation signal of receiving antenna array and deliver to reception respectively
Machine, respectively measurement obtains the phase difference of two electromagnetic horns in orientation and pitch orientation, and records；
Step 5：Double measurement, turntable horizontally rotates 180 °, and measurement again obtains two electromagnetic horns in orientation and pitch orientation
Phase difference, and according to the two groups of phase differences measured, calculates and obtains the triple combination into signal imitation Angle Position and setting position
Deviation；
Step 6：Frequency judges, if all frequencies set in calibration control management module have completed measurement, goes to step
Seven, otherwise, next frequency, four ~ step 5 of repeat step are chosen according to default value of frequency point；
Step 7：Passage judges, if all passages set in calibration control management module have completed measurement, goes to step
Eight, otherwise, next passage is chosen according to default channel value and frequency is set to initial frequency, four ~ step 6 of repeat step；
Step 8：Triple judges, if all triples of antenna array have completed measurement, nine is gone to step, otherwise, under selection
One non-calibration triple, two ~ step 6 of repeat step；
Step 9：Data processing, is utilizedCalculating obtains aerial array angle mould plan
Error, error amount is compared with given accuracy value, judges whether antenna array triple combination accords with into signal imitation angular accuracy
Close and require.
2. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The radio frequency control circuit is
The port controlling information of management module is controlled for receiving calibration, the aerial array radio frequency that control radiofrequency signal is injected into calibration leads to
The circuit in road, includes radio frequency electric switch and ON-OFF control circuit, radio frequency electric switch input terminal and calibration microwave signal source
It is connected, radio frequency electric output switching terminal is connected with by calibration antenna array system；Radio frequency electric switch input terminal and switch control electricity
Road output end is connected；ON-OFF control circuit input controls management module to be connected by LAN with calibration；ON-OFF control circuit
Electrically connected and constituted with integrated chip 74FCT by integrated chip EP2C35F484 by integrated chip LAN91C111.
3. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The calibration control management mould
Block is the module for antenna array calibration control and data processing.
4. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The calibration microwave signal source
For the microwave launcher for producing aerial array microwave signal during calibration.
5. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The four loudspeaker reception antenna
For the reception antenna with four loudspeaker for receiving antenna array radiated radio frequency (RF) signal.
6. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The receiver module is use
The microwave receiving device of mixing amplification is carried out in the signal received to antenna.
7. a kind of multifrequency point antenna array Calibration Method according to claim 1, it is characterized in that：The vector network analyzer
Enter the instrument of line amplitude and phase bit comparison for the intermediate-freuqncy signal after for amplifying to receiver module.
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| CN105223435B (en) * | 2015-08-31 | 2018-10-09 | 北京航天长征飞行器研究所 | A kind of missile-borne anti-interference antenna Auto-Test System and test method |
| CN105203988B (en) * | 2015-10-26 | 2018-05-08 | 于志伟 | A kind of automatic test approach of interferometer system direction finding precision |
| CN105515690B (en) * | 2015-11-26 | 2018-04-10 | 西安空间无线电技术研究所 | The near field sweep check system and its method of testing of a kind of antennaverter |
| CN106443181B (en) * | 2016-08-31 | 2023-07-28 | 中国人民解放军63892部队 | Radio frequency simulation signal environment monitoring system and method based on antenna radiation |
| CN107315174A (en) * | 2017-06-06 | 2017-11-03 | 芜湖航飞科技股份有限公司 | Calibration System based on the Big Dipper |
| CN108021037B (en) * | 2017-11-24 | 2021-01-22 | 上海机电工程研究所 | Triple target array near field effect correction method |
| CN109270504B (en) * | 2018-08-22 | 2020-07-07 | 华清瑞达（天津）科技有限公司 | Microwave darkroom array simulation control method and system |
| CN109633578B (en) * | 2018-12-03 | 2020-09-08 | 上海无线电设备研究所 | Two-channel high-precision phase calibration system and method |
| CN110412527B (en) * | 2019-08-02 | 2021-12-14 | 南京三航信息工程有限公司 | Multi-channel broadband rapid calibration device and rapid calibration method |
| CN110717234A (en) * | 2019-10-17 | 2020-01-21 | 上海机电工程研究所 | Irregular layout triple angular position simulation method, system and medium |
| CN110568414B (en) * | 2019-10-17 | 2023-02-28 | 上海机电工程研究所 | Semi-physical simulation delay calibration method and system based on W-band radar system |
| CN111505555B (en) * | 2020-03-26 | 2022-08-12 | 中国航天系统科学与工程研究院 | Non-coherent electromagnetic detection external field automatic calibration system and method |
| CN111711500B (en) * | 2020-05-06 | 2022-08-19 | 中国人民解放军63892部队 | Simulation antenna array calibration and radio frequency signal monitoring system |
| CN111562445B (en) * | 2020-05-06 | 2022-08-19 | 中国人民解放军63892部队 | Real-time monitoring method for angular simulation precision of radio frequency simulation test system |
| CN113009436B (en) * | 2021-02-24 | 2023-05-09 | 中国电子科技集团公司第十研究所 | Spatial angular position parameter calibration method |
| CN112947119B (en) * | 2021-03-08 | 2022-10-25 | 中国人民解放军63892部队 | Radio frequency semi-physical simulation digital array implementation system and method |
| CN114062791B (en) * | 2021-11-11 | 2023-04-25 | 中国电子科技集团公司第二十九研究所 | Method and device for testing beam pointing direction of injection mode measurement electronic equipment |
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| JPS58210744A (en) * | 1982-06-01 | 1983-12-08 | Fujitsu Denso Ltd | Testing device for data terminal equipment |
| CN102035611B (en) * | 2010-12-29 | 2014-03-12 | 武汉邮电科学研究院 | Remote radio unit multi-antenna real-time calibration system and method |
| CN102545935B (en) * | 2011-12-08 | 2014-07-02 | 南京航空航天大学 | Calibration receiving device and calibration receiving method of radio frequency simulation system |
| CN103957063B (en) * | 2014-04-10 | 2016-03-09 | 贵州航天天马机电科技有限公司 | A kind of ultra short wave communication Device-General receiver test system and method for testing thereof |
| CN204287332U (en) * | 2014-09-18 | 2015-04-22 | 中国人民解放军63892部队 | A kind of multifrequency point antenna array calibration equipment |
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