CN105548978B - A kind of phased array antenna active refelction coefficient test system and method - Google Patents
A kind of phased array antenna active refelction coefficient test system and method Download PDFInfo
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- CN105548978B CN105548978B CN201510939717.7A CN201510939717A CN105548978B CN 105548978 B CN105548978 B CN 105548978B CN 201510939717 A CN201510939717 A CN 201510939717A CN 105548978 B CN105548978 B CN 105548978B
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The invention discloses a kind of phased array antenna active refelction coefficient test system and method.The test system includes vector network analyzer, multichannel width phase control extension set, signal extraction extension set, main control computer, calibrating device and fixed ampllitude phase-compensated cable；Wherein, vector network analyzer is configurable for producing test and excitation signal, receives reference, reflection and monitoring signals；Multichannel width phase control extension set is configurable for realizing that test and excitation signal, by the conversion on 1 road to M roads, the independent amplitude phase controlling of M roads signal, finally realizes the output of M roads width phase controlled stimulus signal；Signal extraction extension set is configurable for realizing the straight-through output of M roads width phase controlled stimulus signal, and the reference coupling of M roads width phase controlled stimulus signal, monitoring coupling, reflection coupling are extracted, and switch control is exported with selection.Test system of the present invention can directly test the active refelction coefficient of antenna element, be not required to calculate, test process is succinct, and manual operation is few, test result validity is high.
Description
Technical field
The present invention relates to a kind of phased array antenna active refelction coefficient test system and method.
Background technology
With the development of phased-array radar, phased-array antenna is so that its feeding classification is various, wave beam control is flexible, scanning speed
The advantages of spending fast and be widely used.When phased array antenna works, the different amplitude-phases of multiple antenna elements are utilized
Feed combination realizes that Beam synthesis is controlled with pointing to.This mode of operation brings following problem：
(1) antenna element of array front end is because closer to the distance, and mutual electromagnetism mutual coupling effect can be produced to antenna impedance
Raw influence, and then reduce the performance of whole aerial array；(2) under phased array antenna actual working state, aerial array exists many
The feeding classification of amplitude-phase combination is planted, different feeding classifications can produce different mutual couplings between antenna element, cause
Different impedance operators are presented in antenna element, can produce Different Effects to whole antenna array performance.
To obtain the feed efficiency of each antenna element under array antenna actual working state, to ensure the whole of phased array antenna
Body performance indications, it is necessary to complete the active refelction system of phased-array antenna array each unit antenna in array under different feeding classifications
Number test.
Existing phased array antenna active refelction coefficient testing method be indirectly testing method, its test philosophy as shown in figure 1,
By being tested the measurement of antenna element itself reflected signal and mutual coupling unit coupled signal, binding number student movement is calculated.It is false
If array scale is M × N (M rows N row), antenna element 7 (being located at the m row n column positions of array, m≤M, n≤N) is tested, it is complete first
Into vector network analyzer 10 dual-port calibrate, by Fig. 1 (a) Suo Shi by tested antenna element 7 and vector network analyzer 10
Test port is connected, the antenna element of other in array matching connection load 9, and manual or program control vector network analyzer 10 completes quilt
The self coupling reflectance factor test of antenna element 7 is surveyed, S11 is designated asmn；Then press antenna element 8 shown in Fig. 1 (b) (positioned at array
J row i column positions, j≤M, i≤N, j ≠ m, i ≠ n) it is connected with another test port of vector network analyzer 10, manual or journey
Control vector network analyzer 10 and complete tested the mutual coupling coefficient test between antenna element 7 and antenna element 8, be designated as S21mn ji,
By Fig. 1 (b) Suo Shi, keeping, the tested connection mode of antenna element 7 is constant, and the antenna element that diverse location is chosen successively is used as mutual coupling
Test object (in whole test process in addition to the antenna element of test line, the load of other antenna element matching connections), traversal
Whole test process, completes the test of M × N-1 groups the mutual coupling coefficient.
The active refelction coefficient that can complete tested antenna element 7 using formula (1) is calculated：
According to the above-mentioned tested active refelction coefficient testing method of antenna element 7, changed successively according to the mode of connection shown in Fig. 1
Selected antenna element wiring, can complete the test of all antenna element active refelction coefficients in whole aerial array.
There are the following problems in the application for above-mentioned indirect test method：
(1) test can not reflect phased array antenna actual working state, a certain moment only one of which antenna element during test
In feed condition, feed condition is not inconsistent simultaneously with phased array antenna unit, and test result can not reflect that aerial array exists strictly according to the facts
Active refelction coefficient index under virtual condition；(2) the active refelction coefficient of each antenna element, which is obtained, is required to complete a large amount of
Mutual coupling parameter testing, test line intricate operation, workload is big, and testing efficiency is low, for extensive phased array, engineering
It is realisation poor；(3) above method can not realize the Amplitude Phase Conversion control of many line feed pumping signals, it is impossible to effectively reflection
Go out active refelction coefficient of the phased array antenna under different excitation feed conditions.
The content of the invention
For above-mentioned technical problem present in prior art, the present invention proposes a kind of phased array antenna active refelction system
Number test system, it is adopted the following technical scheme that：
A kind of phased array antenna active refelction coefficient test system, including vector network analyzer, multichannel width phase control
Extension set, signal extraction extension set, main control computer, calibrating device and fixed ampllitude phase-compensated cable；Wherein,
Vector network analyzer is configurable for producing test and excitation signal, receives reference, reflection and monitoring signals；
Multichannel width phase control extension set is configurable for realizing that test and excitation signal is believed by the conversion on 1 road to M roads, M roads
Number independent amplitude phase controlling, finally realize the output of M roads width phase controlled stimulus signal；
Signal extraction extension set is configurable for realizing the straight-through output of M roads width phase controlled stimulus signal, and M roads width is mutually controllable
The reference coupling of pumping signal, monitoring coupling, reflection coupling are extracted, and switch control is exported with selection；
Main control computer is configurable for realizing and whole system calibration is automatically controlled with test；
Calibrating device is configurable for completing the calibration of whole system；
Fixed ampllitude phase-compensated cable is configurable for realizing in system between relevant device and system and tested aerial array
Connection.
Preferably, multichannel width phase control extension set includes M roads power division network, a M roads width phase control passage, led to one more
Road width phase control extension set interface conversion circuit, multichannel width phase control Exgt Bat extension battery, a multichannel width phase control extension set
Input interface and M multichannel width phase control extension set output interface；Wherein, per road width phase control passage by a numerical control phase shift
Device, a numerical-control attenuator and a power amplifier composition；Digital phase shifter and numerical-control attenuator are distinguished by numerical control order
The regulation control of phase, amplitude is realized, its control interface is by controlling cable and multichannel width phase control extension set interface conversion electricity
Road is connected；Multichannel width phase control extension set interface conversion circuit is used to realize that numerical control microwave part control command is arrived in outside program control order
Interface conversion and data distribution；Multichannel width phase control Exgt Bat extension battery is used to power for microwave part in the width phase control passage of M roads；
Multichannel width phase control extension set input interface is used for the access for realizing test and excitation signal, multichannel width phase control extension set input
The source output terminal mouthful connection of interface and vector network analyzer；Multichannel width phase control extension set output interface is used to realize M roads width
The output of phase controlled stimulus signal, the multichannel width phase control extension set output interface input port corresponding with signal extraction extension set
It is connected；Signal extraction extension set includes M roads coupling network, three M and selects 1 switch, signal extraction extension set interface conversion circuit, one
Individual signal extraction Exgt Bat extension battery, M signal extraction extension set input interface, M signal extraction extension set output interface, a reference are defeated
Outgoing interface, a monitoring output interface and a reflection output interface；Wherein, per road coupling network by three coupler groups
Into being respectively used to realize the straight-through output of excitation and the straight-through output of coupling output, excitation and the coupling of monitoring signals of reference signal
Output and the straight-through output of excitation and the coupling of tested antenna-reflected echo-signal are exported；Three M select 1 switch to be respectively used to realization
Switching selection output, the switching selection output of M road monitoring coupled signal and M road reflection coupling letter of the M roads with reference to coupled signal
Number switching selection output；Signal extraction extension set interface conversion circuit is used to realize that outside program control order selects 1 switch control to three M
Make the interface conversion and data distribution of order；Signal extraction Exgt Bat extension battery is used to select 1 switch to power for three M；Signal extraction point
Machine input interface is used for the access for realizing pumping signal, the signal extraction extension set input interface and multichannel width phase control extension set
Output interface is connected；The output for the pumping signal that signal extraction extension set output interface is used for after width phase control, the signal extraction point
Machine output interface is configurable for being connected with being tested the antenna element feeding interface of aerial array；It is used for reference to output interface real
Output is extracted in the reference of pumping signal after existing width phase control, and this is with reference to output interface and the receiver one of vector network analyzer
Input port is connected；Monitoring output interface is used to realize that output, monitoring output to be extracted in the monitoring of pumping signal after width phase control
Interface is connected with one input port of receiver of vector network analyzer；Reflection output interface is used to realize tested antenna element
The extraction output of reflection echo, the reflection output interface is connected with one input port of receiver of vector network analyzer.
In addition, the invention also provides a kind of phased array antenna active refelction coefficient testing method, it uses following technology
Scheme：
A kind of phased array antenna active refelction coefficient testing method, is tested using above-mentioned phased array antenna active refelction coefficient
System, this method comprises the following steps：
Vector network analyzer port exports the pumping signal of setpoint frequency and power, and the pumping signal enters width phase control
The input interface of extension set, after M roads power division network work(point, is adjusted and power amplification, entering signal per road signal through amplitude-phase
Extract extension set, independent width mutually adjust after the coupled network of M roads signal after, through connect signal is fed to tested aerial array, now,
M antenna element is simultaneously in feed condition, and the amplitude-phase of the electric feed signal of each antenna element reception is individually controllable
, therefore, the mutual coupling effect existed between antenna element is identical with array actual working state, now, measures obtained antenna list
The reflectance factor of member coincide with the active refelction coefficient under its actual working state；Under main control computer control, vector network
Analyzer receives the reference signal that reflected signal and the coupler that coupler extracts are extracted simultaneously, it is calibrated with after calculation process,
The active refelction coefficient of tested antenna element is immediately arrived at, the switching of 1 switch is selected by the M in signal extraction extension set, it is real respectively
Now it is tested the active refelction coefficient test of M antenna element in aerial array；Under main control computer control, vector network analysis
Instrument is also received in the monitoring signals of coupler extraction, long-time test process, and main control computer is automatically performed the prison of extract real-time
The contrast of signal and storage normal data is surveyed, if monitoring signals amplitude-phase exceeds specified thresholds in real time, main control computer is carried
Show into row of channels calibration, working condition of the user according to the monitoring passage real-time monitored system.
In addition, the invention also provides a kind of extension set calibration method of phased array antenna active refelction coefficient test system,
The extension set calibration method is directed to above-mentioned phased array antenna active refelction coefficient test system；
The extension set calibration method is specially：System boot is preheated first, subsequently completes the dual-port of vector network analyzer
Calibration；The calibration line of each equipment of completion system；Set the working frequency of vector network analyzer active anti-for phased array antenna
Penetrate working frequency during coefficient index test, performance number when power is test；Set vector network analyzer test parameter be
S21 and R2/R1, wherein, S21 represents the width phase information of extension set passage, and R2/R1 represents the monitoring standard number of passage width phase information
According to；Program control multichannel width phase control extension set；Change amplitude-phase controlled quentity controlled variable to require until meeting tested phased array antenna feed, adopt
Collect and store the corresponding S21 and R2/R1 amplitude-phases data of the passage；Be sequentially completed remaining channel 2 to passage M correspondence S21 and
The collection storage of R2/R1 amplitude-phase data；Adopting for each channel data under all working frequency is sequentially completed according to above-mentioned steps
Collection storage, sets up extension set calibration data matrix, completes extension set calibration.
In addition, the invention also provides a kind of system calibration method of phased array antenna active refelction coefficient test system,
The extension set calibration method is directed to above-mentioned phased array antenna active refelction coefficient test system；
The system calibration method is specially：The calibration line of each equipment first in completion system；System boot is preheated, then
Working frequency when to set vector network analyzer working frequency be phased array antenna active refelction coefficient index test, power is
Performance number during test；The test parameter for setting vector network analyzer is S21 and S11, wherein, S21 represents system channel
Monitoring signals, S11 represents the reflected signal of system channel；According to extension set calibration data arranged in matrix multichannel width phase control extension set
Controlled quentity controlled variable, keep set it is constant, set vector network analyzer test trails be S11, open calibration menu, select it is single-ended
Mouth calibration, the single port calibration of vector network analyzer is completed according to prompting using calibrating device, and calibration finishes completion system simultaneously
The calibration of passage 1, completes the calibration that passage 2 arrives passage M according to above-mentioned steps, is finally completed system calibration.
The invention has the advantages that：
(1) produced while present system can realize multichannel width phase controlled stimulus signal, be tested feedback during antenna measurement
Identical when electricity condition is with real work, system directly tests the active refelction coefficient of antenna element, is not required to calculate, test process letter
Clean, manual operation is few, and test result validity is high；
(2) present system can realize phased array antenna not by changing the controlled quentity controlled variable of multichannel width phase control extension set
With the feed under wave beam state, surveyed so as to complete active refelction coefficient of the phased array antenna under different beams state of a control
Examination；
(3) present system possesses the real time monitoring function of excitation electric feed signal, and excitation electric feed signal can be obtained in real time
Amplitude-phase information, can combine the real-time amendment that system software completes the amplitude phase error of excitation electric feed signal；
(4) calibration algorithm that present invention calibration is carried using vector network analyzer, technology maturation, calibration is accurate, can expire
Sufficient active refelction coefficient high precision measurement requirement；
(5) after the completion of present system calibration, test process is completely programme-controlled, and automaticity is high, and test speed is fast, keeps away
Exempt from the error that artificial line operation is brought, measuring accuracy is high.
Brief description of the drawings
Fig. 1 is antenna array unit active refelction coefficient indirect test method schematic diagram in the prior art；
Fig. 2 is a kind of phased array antenna active refelction coefficient test system block diagram in the present invention；
Fig. 3 is the composition frame chart of multichannel width phase control extension set in the present invention；
Fig. 4 is the composition frame chart of signal extraction extension set in the present invention；
Fig. 5 calibrates schematic flow sheet for a kind of extension set of phased array antenna active refelction coefficient test system in the present invention；
Fig. 6 calibrates line graph for a kind of extension set of phased array antenna active refelction coefficient test system in the present invention；
Fig. 7 is a kind of system calibration schematic flow sheet of phased array antenna active refelction coefficient test system in the present invention；
Fig. 8 is a kind of system calibration line graph of phased array antenna active refelction coefficient test system in the present invention；
Wherein, 1- vector network analyzers, 2- multichannel width phase control extension sets, 3- signal extraction extension sets, 4- master controls are calculated
Machine, 5- calibrating devices, 6- fixed ampllitude phase-compensated cables, 7- is tested antenna element, 8- antenna elements, 9- loads, 10- vector network analysis
Instrument；21-M roads power division network, 22- width phase control passages, 23- multichannel width phase control extension set interface conversion circuits, 24- multichannels
Width phase control Exgt Bat extension battery, 25- multichannel width phase control extension set input interfaces, 26- multichannel width phase control extension set output interfaces,
221- digital phase shifters, 222- numerical-control attenuators, 223- power amplifiers, 31- coupling networks, 32,33,34-M select 1 switch,
35- interface conversion circuits, 36- power supplys, 37- input interfaces, 38- output interfaces, 39- refers to output interface, and 40- monitoring outputs connect
Mouthful, 41- reflection output interface, 311,312,313- couplers.
Embodiment
Embodiment 1
As shown in Fig. 2 a kind of phased array antenna active refelction coefficient test system, including vector network analyzer 1, lead to more
Road width phase control extension set 2, signal extraction extension set 3, main control computer 4, calibrating device 5 and fixed ampllitude phase-compensated cable 6；Wherein,
Vector network analyzer 1 is the main frame of signal generation and reception processing, for producing test and excitation signal, receives ginseng
Examine, reflect and monitoring signals, the market ripe of selection corresponding frequency band can be required according to test frequency.
Multichannel width phase control extension set 2 is configurable for realizing that test and excitation signal is believed by the conversion on 1 road to M roads, M roads
Number independent amplitude phase controlling, finally realize the output of M roads width phase controlled stimulus signal.
Herein, M refers to the antenna element sum of tested aerial array.
As shown in figure 3, multichannel width phase control extension set 2 include M roads power division network 21, M roads width phase control passage 22,
One interface conversion circuit 23, a power supply 24, an input interface 25 and M output interface 26；Wherein,
M roads power division network 21 can select power splitter realization；Per road width phase control passage 22 by a digital phase shifter 221,
One numerical-control attenuator 222 and a power amplifier 223 are constituted, and each part design parameter is designed according to testing requirement and determined,
Wherein, digital phase shifter 221, numerical-control attenuator 222 can realize the regulation control of phase, amplitude, control respectively by numerical control order
Order processed can be serial, parallel etc., and its control interface is by controlling cable to be connected with interface conversion circuit 23.
Interface conversion circuit 23 is used to realize outside program control order to the interface conversion sum of numerical control microwave part control command
According to distribution etc., the mode of 1 road serial ports or network interface or parallel port or USB port input, multi-channel serial port or parallel port output is may be designed as, can be used
PLD, special purpose interface conversion chip etc. realize that the present invention is realized without being described in detail to its specific design.
Power supply 24 is used to power for microwave part in the width phase control passage of M roads, is designed according to the microwave part specifically selected,
The present invention is realized without description to its specific design.
Input interface 25 realizes the access of pumping signal, can select general connector and realizes, with vector network analysis in Fig. 2
The source output terminal mouthful of instrument 1 is connected.
Output interface 26 realizes the output of M roads width phase control pumping signal, can select general connector and realizes, and in Fig. 1
The corresponding input port of signal extraction extension set 3 is connected.
Signal extraction extension set 3 is configurable for realizing the straight-through output of M roads width phase controlled stimulus signal, and M roads width mutually can
The reference coupling, monitoring coupling, reflection coupling for controlling pumping signal are extracted, and switch control is exported with selection.Specifically,
As shown in figure 4, signal extraction extension set 3 selects 1 switch 32,33,34, interface by M roads coupling network 31, three M
Change-over circuit 35, power supply 36, M input interface 37, M output interface 38, reference output interface 39, a monitoring
Output interface 40 and a reflection output interface 41 are constituted.Wherein,
Every 1 road coupling network 31 (by taking coupling network 1 as an example) is all made up of 3 couplers, wherein, coupler 311 is used for
The straight-through output of excitation and the coupling of reference signal are exported, and coupler 312 is used to encourage straight-through output and the coupling of monitoring signals defeated
Go out, coupler 313 is used to encourage straight-through output and the coupling of tested antenna-reflected echo-signal to export, and coupler can be according to test
It is required that selection finished product microwave part or design are realized.
M selects 1 switch 32 to be used for M roads and selects output with reference to the switching of coupled signal, and its control signal is by interface conversion circuit
35 are provided, and power supply is provided by power supply 36, finished product microwave part or design can be selected to realize according to test request.
M selects 1 switch 33 to be used for the switching selection output that M roads monitor coupled signal, and its control signal is by interface conversion circuit
35 are provided, and power supply is provided by power supply 36, finished product microwave part or design can be selected to realize according to test request.
The switching that M selects 1 switch 34 and is used for M roads reflection coupling signal selects output, and its control signal is by interface conversion circuit
35 are provided, and power supply is provided by power supply 36, finished product microwave part or design can be selected to realize according to test request.
Interface conversion circuit 35 realize outside program control order to M select the control command of 1 switch 32,33,34 interface conversion and
Data distribution etc., may be designed as the mode of 1 road serial ports or network interface or parallel port or USB port input, multi-channel serial port or parallel port output, can
Realized with PLD, special purpose interface conversion chip etc., the present invention is realized without being described in detail to its specific design.
Power supply 36 is used to select 1 switch 32,33,34 to power for M, is designed according to the microwave part specifically selected, the present invention
Its specific design is realized without description.
Input interface 37 realizes the access of pumping signal, can select general connector and realizes, phased with multichannel in Fig. 2
The output interface 26 of extension set 2 processed is connected.
The output for the pumping signal that output interface 38 is used for after width phase control, can select general connector and realizes, with being tested
The antenna element feeding interface of aerial array is connected.
Output is extracted in the reference for the pumping signal being used for reference to output interface 39 after width phase control, can select general connector
Realize, be connected with the receiver R1 input ports of vector network analyzer in Fig. 2.
Output is extracted in the monitoring for monitoring the pumping signal that output interface 40 is used for after width phase control, can select general connector
Realize, be connected with the receiver B input ports of vector network analyzer in Fig. 21.
Reflection output interface 41 is used for the extraction output for being tested antenna element reflection echo, can select general connector real
It is existing, it is connected with the receiver A input ports of vector network analyzer in Fig. 21.
Main control computer (system software) 4 is configurable for whole system calibration and automatically controlling for testing.
Calibrating device 5 is configurable for completing the calibration of whole system, can select the supporting electronics of vector network analyzer 1
Calibrating device or mechanical calibration kits, can require the market ripe of selection corresponding frequency band according to test frequency.
Fixed ampllitude phase-compensated cable 6 is configurable for realizing in system between relevant device and system and tested aerial array
Connection, can according to test frequency require selection corresponding frequency band market ripe.
Fixed ampllitude phase-compensated cable 6 includes tri- groups of 6A, 6B, 6C, wherein, fixed ampllitude phase-compensated cable 6A is used to connect signal extraction extension set
3 with tested aerial array；Fixed ampllitude phase-compensated cable 6B is used for connecting multi-channel width phase control extension set 2 and signal extraction extension set 3；Fixed ampllitude
Phase-compensated cable 6C is used for connected vector Network Analyzer 1 and signal extraction extension set 3.
Embodiment 2
A kind of phased array antenna active refelction coefficient testing method in the present embodiment 2, using the phased array in embodiment 1
Antenna active reflectance factor test system, this method comprises the following steps：
The port of vector network analyzer 1 exports the pumping signal of setpoint frequency and power, and the signal enters width phase control point
The input interface 25 of machine 2, after the work(point of M roads power division network 21, is adjusted and power amplification, into letter per road signal through amplitude-phase
Number extraction extension set 3, independent width mutually adjust after the coupled network 31 of M roads signal after, through connect signal is fed to tested aerial array,
Now, M antenna element is simultaneously in feed condition, and the amplitude-phase of the electric feed signal of each antenna element reception is independent
Controllable, therefore the mutual coupling effect existed between antenna element is identical with array actual working state, now measures obtained antenna
The reflectance factor of unit coincide with the active refelction coefficient under its actual working state.
Under the control of main control computer (system software) 4, vector network analyzer 1 receives what coupler 313 was extracted simultaneously
The reference signal that reflected signal is extracted with coupler 311, it is calibrated with after calculation process, tested antenna element can be immediately arrived at
Active refelction coefficient, the switching of 1 switch is selected by the M in signal extraction extension set 3, and M can be realized in tested aerial array respectively
The active refelction coefficient test of antenna element.Under the control of main control computer (system software) 4, vector network analyzer 1 may be used also
Receive in the monitoring signals that coupler 312 is extracted, long-time test process, system software is automatically performed the monitoring letter of extract real-time
Number with storing the contrast of normal data, if monitoring signals amplitude-phases exceeds specified thresholds in real time, system software prompting is carried out
Passage is calibrated, and user can be according to the monitoring passage real-time monitored working state of system, it is ensured that the measuring accuracy of whole system.
Embodiment 3
The extension set calibration method of a kind of phased array antenna active refelction coefficient test system in the present embodiment 3, for reality
The phased array antenna active refelction coefficient test system in example 1 is applied, the purpose is to complete multichannel width phase control extension set, signal to carry
Take the calibration of amplitude and phase of extension set, system cable.
Calibrate flow as shown in Figure 5：System boot is preheated first, subsequently completes the dual-port school of vector network analyzer
It is accurate；The calibration line of each equipment of system is completed according to Fig. 6；The working frequency for setting vector network analyzer 1 is phased array antenna
Working frequency during active refelction coefficient index test, performance number when power is test；Vector network analyzer 1 is set to test
Parameter is S21 and R2/R1, wherein, S21 represents the width phase information of extension set passage, and R2/R1 represents the monitoring mark of passage width phase information
Quasi- data；Program control multichannel width phase control extension set 2；Changing amplitude-phase controlled quentity controlled variable will until meeting tested phased array antenna feed
Ask, gather and store the corresponding S21 and R2/R1 amplitude-phases data of the passage；Remaining channel 2 is sequentially completed to passage M correspondences
The collection storage of S21 and R2/R1 amplitude-phase data；Each channel data under all working frequency is sequentially completed according to above-mentioned steps
Collection storage, set up extension set calibration data matrix, complete extension set calibration.
The present embodiment 3 utilizes system extension set collimation technique, it is not necessary to additionally increases equipment, utilizes the vector network in system
The equipment such as analyzer 1 and calibrating device 5, passes through the different modes of connection, completes multichannel width phase control extension set 2, signal extraction point
The calibration of amplitude and phase of machine 3, system cable, obtains multichannel extension set calibration data matrix.
Embodiment 4
The system calibration method of a kind of phased array antenna active refelction coefficient test system in the present embodiment 4, for reality
The phased array antenna active refelction coefficient test system in example 1 is applied, the purpose is to complete the calibration of whole system test port.
Calibrate flow as shown in Figure 7：First as shown in Figure 8 in completion system each equipment calibration line；System boot is pre-
Heat, the work frequency when working frequency of vector network analyzer 1 then being set for phased array antenna active refelction coefficient index test
Rate, performance number when power is test；The test parameter for setting vector network analyzer 1 is S21 and S11, wherein, S21 is represented
The monitoring signals of system channel, S11 represents the reflected signal of system channel；According to extension set calibration data arranged in matrix multichannel width
The controlled quentity controlled variable of phase control extension set, keeps setting constant, the test trails for setting vector network analyzer 1 are S11, opens calibration dish
Single, selection single port calibration, the single port for completing vector network analyzer using calibrating device 5 according to prompting is calibrated, and calibration is finished
The calibration of system channel 1 is completed simultaneously, is completed the calibration that passage 2 arrives passage M according to above-mentioned steps, is finally completed system calibration.
The calibration algorithm that the present embodiment 4 is carried using the hardware device of test system in itself with vector network analyzer 1, it is real
Existing whole system test port calibration, calibration method is simple, and calibration accuracy is high, and measuring accuracy can be effectively ensured.
Certainly, described above is only presently preferred embodiments of the present invention, and the present invention is not limited to enumerate above-described embodiment, should
When explanation, any those skilled in the art are all equivalent substitutes for being made, bright under the teaching of this specification
Aobvious variant, all falls within the essential scope of this specification, ought to be protected by the present invention.
Claims (4)
1. a kind of phased array antenna active refelction coefficient test system, it is characterised in that including vector network analyzer, multichannel
Width phase control extension set, signal extraction extension set, main control computer, calibrating device and fixed ampllitude phase-compensated cable；Wherein,
Vector network analyzer is configurable for producing test and excitation signal, receives reference, reflection and monitoring signals；
Multichannel width phase control extension set is configurable for realizing test and excitation signal by the conversion on 1 road to M roads, M roads signal
Independent amplitude phase controlling, finally realizes the output of M roads width phase controlled stimulus signal；
Signal extraction extension set is configurable for realizing the straight-through output of M roads width phase controlled stimulus signal, M roads width phase controlled stimulus
The reference coupling of signal, monitoring coupling, reflection coupling are extracted, and switch control is exported with selection；
Main control computer is configurable for realizing and whole system calibration is automatically controlled with test；
Calibrating device is configurable for completing the calibration of whole system；
Fixed ampllitude phase-compensated cable is configurable for realizing in system between relevant device and system and the company of tested aerial array
Connect；
Multichannel width phase control extension set includes M roads power division network, M roads width phase control passage, a multichannel width phase control
Extension set interface conversion circuit, a multichannel width phase control Exgt Bat extension battery, a multichannel width phase control extension set input interface and M
Individual multichannel width phase control extension set output interface；Wherein, declined per road width phase control passage by a digital phase shifter, a numerical control
Subtract device and a power amplifier composition；Digital phase shifter and numerical-control attenuator realize phase, amplitude respectively by numerical control order
Regulation control, its control interface is by controlling cable to be connected with multichannel width phase control extension set interface conversion circuit；Multichannel
Width phase control extension set interface conversion circuit be used to realizing outside program control order to the interface conversion of numerical control microwave part control command and
Data distribution；Multichannel width phase control Exgt Bat extension battery is used to power for microwave part in the width phase control passage of M roads；Multichannel is phased
Extension set input interface processed is used for the access for realizing test and excitation signal, the multichannel width phase control extension set input interface and vector net
The source output terminal mouthful connection of network analyzer；Multichannel width phase control extension set output interface is used to realize M roads width phase controlled stimulus letter
Number output, the multichannel width phase control extension set output interface input port corresponding with signal extraction extension set be connected；Signal is carried
Take extension set to include M roads coupling network, three M and select 1 switch, signal extraction extension set interface conversion circuit, a signal extraction
Exgt Bat extension battery, M signal extraction extension set input interface, M signal extraction extension set output interface, reference output interface, one
Individual monitoring output interface and a reflection output interface；Wherein, constitute, be respectively used to by three couplers per road coupling network
Realize the straight-through output of excitation and the straight-through coupling output exported with monitoring signals of coupling output, the excitation of reference signal and encourage
Straight-through output and the coupling of tested antenna-reflected echo-signal are exported；Three M select 1 switch to be respectively used to realize M roads with reference to coupling
The switching selection output of signal, the switching selection output and the switching of M roads reflection coupling signal selection of M roads monitoring coupled signal
Output；Signal extraction extension set interface conversion circuit is used for the interface for realizing that 1 switch control command is selected in outside program control order to three M
Conversion and data distribution；Signal extraction Exgt Bat extension battery is used to select 1 switch to power for three M；Signal extraction extension set input interface is used
In the access for realizing pumping signal, the output interface of the signal extraction extension set input interface and multichannel width phase control extension set connects
Connect；The output for the pumping signal that signal extraction extension set output interface is used for after width phase control, the signal extraction extension set output interface
It is configurable for being connected with the antenna element feeding interface of tested aerial array；It is used to realize width phase control with reference to output interface
Output is extracted in the reference of pumping signal afterwards, and this refers to one input port phase of receiver of output interface and vector network analyzer
Even；Monitoring output interface is used to realize that output, the monitoring output interface and vector to be extracted in the monitoring of pumping signal after width phase control
One input port of receiver of Network Analyzer is connected；Reflection output interface is used to realize tested antenna element reflection echo
Output is extracted, the reflection output interface is connected with one input port of receiver of vector network analyzer.
2. a kind of phased array antenna active refelction coefficient testing method, using a kind of phased array antenna as claimed in claim 1
Active refelction coefficient test system, it is characterised in that this method comprises the following steps：
Vector network analyzer port exports the pumping signal of setpoint frequency and power, and the pumping signal enters width phase control extension set
Input interface, through after M roads power division network work(point, being adjusted and power amplification through amplitude-phase per road signal, entering signal is extracted
Extension set, independent width mutually adjust after the coupled network of M roads signal after, through connect signal is fed to tested aerial array, now, M
Antenna element simultaneously in feed condition, and the amplitude-phase of electric feed signal that receives of each antenna element be it is individually controllable,
Therefore, the mutual coupling effect existed between antenna element is identical with array actual working state, now, the antenna element that measurement is obtained
Reflectance factor coincide with the active refelction coefficient under its actual working state；Under main control computer control, vector network analysis
Instrument is while receive after reflected signal and the reference signal of coupler extraction that coupler is extracted, calibrated and calculation process, directly
The active refelction coefficient of tested antenna element is drawn, the switching of 1 switch is selected by the M in signal extraction extension set, quilt is realized respectively
The active refelction coefficient test of M antenna element in observation linear array；Under main control computer control, vector network analyzer is also
Receive in the monitoring signals that coupler is extracted, long-time test process, main control computer is automatically performed the monitoring letter of extract real-time
Number with storing the contrast of normal data, if monitoring signals amplitude-phases exceeds specified thresholds in real time, main control computer point out into
Row of channels is calibrated, working condition of the user according to the monitoring passage real-time monitored system.
3. a kind of extension set calibration method of phased array antenna active refelction coefficient test system, for one described in claim 1
Kind of phased array antenna active refelction coefficient test system, it is characterised in that the extension set calibration method is specially：System boot first
Preheating, subsequently completes the dual-port calibration of vector network analyzer；The calibration line of each equipment of completion system；Vector network is set
The working frequency when working frequency of analyzer is phased array antenna active refelction coefficient index test, work(when power is test
Rate value；It is S21 and R2/R1 to set vector network analyzer test parameter, wherein, S21 represents the width phase information of extension set passage,
R2/R1 represents the monitoring standard data of passage width phase information；Program control multichannel width phase control extension set；Change amplitude-phase controlled quentity controlled variable
Required until meeting tested phased array antenna feed, gather and store the corresponding S21 and R2/R1 amplitude-phases data of the passage；
Remaining channel 2 is sequentially completed to the collection storage of passage M correspondence S21 and R2/R1 amplitude-phase data；According to above-mentioned steps successively
The collection storage of each channel data under all working frequency is completed, extension set calibration data matrix is set up, extension set calibration is completed.
4. a kind of system calibration method of phased array antenna active refelction coefficient test system, for one described in claim 1
Kind of phased array antenna active refelction coefficient test system, it is characterised in that the system calibration method is specially：System is completed first
In each equipment calibration line；System boot is preheated, and then sets vector network analyzer working frequency to have for phased array antenna
Working frequency during the reflectance factor index test of source, performance number when power is test；The test of vector network analyzer is set
Parameter is S21 and S11, wherein, S21 represents the monitoring signals of system channel, and S11 represents the reflected signal of system channel；According to
The controlled quentity controlled variable of extension set calibration data arranged in matrix multichannel width phase control extension set, keeps setting constant, sets vector network analysis
The test trails of instrument are S11, open calibration menu, and selection single port calibration completes vector network according to prompting using calibrating device
The single port calibration of analyzer, calibrates and finishes while completing the calibration of system channel 1, completing passage 2 according to above-mentioned steps arrives logical
Road M calibration, is finally completed system calibration.
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