CN105548978A - Active reflection coefficient test system and method of phased array antenna - Google Patents
Active reflection coefficient test system and method of phased array antenna Download PDFInfo
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- CN105548978A CN105548978A CN201510939717.7A CN201510939717A CN105548978A CN 105548978 A CN105548978 A CN 105548978A CN 201510939717 A CN201510939717 A CN 201510939717A CN 105548978 A CN105548978 A CN 105548978A
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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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- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
Abstract
The invention discloses an active reflection coefficient test system and method of a phased array antenna. The test system comprises a vector network analyzer, a multichannel amplitude phase control auxiliary unit, a signal extraction auxiliary unit, a master control computer, a calibration member and an amplitude-stabilizing phase-stabilizing cable, wherein the vector network analyzer is configured to generate test excitation signals and receive reference, reflection and monitoring signals; the multichannel amplitude phase control auxiliary unit is configured to convert one path of excitation signals into M paths, control the amplitudes and phases of the M paths of signals independently, and output M paths of amplitude and phase controllable excitation signals; and the signal extraction auxiliary unit is configured to realize straight-through output of the M paths of amplitude and phase controllable excitation signals, carry out reference coupling, monitoring coupling and reflection coupling extraction on the M paths of amplitude and phase controllable excitation signals, and implement switching control and selective output. The test system can directly test the active reflection coefficient of the antenna unit needless of calculation, the test process is concise, manual operation is less, and the test result is highly correct.
Description
Technical field
The present invention relates to a kind of phased array antenna active refelction coefficient test macro and method.
Background technology
Along with the development of phased-array radar, advantages such as phased-array antenna is various with its feeding classification, wave beam controls flexibly, sweep velocity is fast and being widely used.During phased array antenna work, utilize the different amplitude-phase feed combination of multiple antenna element to realize Beam synthesis and control with sensing.This mode of operation brings following problem:
(1) antenna element of array front end is because close together, and mutual electromagnetism mutual coupling effect can have an impact to antenna impedance, and then reduces the performance of whole aerial array; (2) under phased array antenna actual working state, there is the feeding classification of multiple amplitude phase combination in aerial array, different feeding classifications can produce different mutual couplings between antenna element, cause antenna element to present different impedance operators, Different Effects can be produced to whole antenna array performance.
For obtaining the feed efficiency of each antenna element under array antenna actual working state, to ensure the overall performance index of phased array antenna, phased-array antenna array active refelction coefficient test of each element antenna in array under different feeding classification must be completed.
Existing phased array antenna active refelction coefficient testing method is indirectly testing method, and as shown in Figure 1, by the measurement of self reflected signal of tested antenna element and mutual coupling element coupling signal, Binding number student movement calculates its test philosophy.Suppose that array scale is M × N (the capable N row of M), tested antenna element 7 (is positioned at the capable n column position of m of array, m≤M, n≤N), first complete the dual-port calibration of vector network analyzer 10, by Fig. 1 (a) Suo Shi, tested antenna element 7 is connected with vector network analyzer 10 test port, other antenna element matching connection loads 9 in array, manual or program control vector network analyzer 10 completes the self coupling reflection coefficient test of tested antenna element 7, is designated as S11
mn; Then by Fig. 1 (b) Suo Shi, antenna element 8 (is positioned at the capable i column position of j of array, j≤M, i≤N, j ≠ m, i ≠ n) be connected with another test port of vector network analyzer 10, the mutual coupling coefficient that manual or program control vector network analyzer 10 completes between tested antenna element 7 and antenna element 8 is tested, and is designated as S21
mn jishown in Fig. 1 (b), keep tested antenna element 7 connection mode constant, the antenna element choosing diverse location successively as mutual coupling tested object (in whole test process except the antenna element of test line, other antenna element matching connection loads), travel through whole test process, complete the test of M × N-1 group the mutual coupling coefficient.
Utilize formula (1) that the active refelction coefficient calculations of tested antenna element 7 can be completed:
According to above-mentioned tested antenna element 7 active refelction coefficient testing method, change selected antenna element wiring successively according to the mode of connection shown in Fig. 1, the test of all antenna element active refelction coefficients in whole aerial array can be completed.
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, during test, a certain moment only has an antenna element to be in feed condition, be not inconsistent with feed condition while of phased array antenna unit, test result can not reflect the active refelction coefficient index of aerial array under virtual condition strictly according to the facts; (2) the active refelction coefficient of each antenna element obtains and has all needed a large amount of mutual coupling parameter testings, test line intricate operation, and workload is large, and testing efficiency is low, and for extensive phased array, Project Realization is poor; (3) said method can not realize the Amplitude Phase Conversion control of multichannel feed pumping signal, effectively can not reflect the active refelction coefficient of phased array antenna under difference excitation feed condition.
Summary of the invention
For the above-mentioned technical matters existed in prior art, the present invention proposes a kind of phased array antenna active refelction coefficient test macro, it adopts following technical scheme:
A kind of phased array antenna active refelction coefficient test macro, comprises vector network analyzer, hyperchannel 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 configured to for generation of test and excitation signal, receives reference, reflection and monitor signal;
Hyperchannel width phase control extension set is configured to, for realizing test and excitation signal by the conversion of 1 road to M road, the independent amplitude phase control of M road signal, finally realize the output of M road width phase controlled stimulus signal;
Signal extraction extension set is configured to the straight-through output for realizing M road width phase controlled stimulus signal, and the reference of M road width phase controlled stimulus signal is coupled, monitoring is coupled, reflection coupling extracts, and switch control rule exports with selection;
Main control computer is configured to for realizing the automatic control of whole system calibration with test;
Calibrating device is configured to the calibration for completing whole system;
Fixed ampllitude phase-compensated cable is configured to for realizing in system between relevant device and the connection of system and tested aerial array.
Preferably, hyperchannel width phase control extension set comprises a M road power division network, M road width phase control passage, a hyperchannel width phase control extension set interface conversion circuit, a hyperchannel width phase control Exgt Bat extension battery, a hyperchannel width phase control extension set input interface and M hyperchannel width phase control extension set output interface; Wherein, every road width phase control passage is made up of a digital phase shifter, a numerical-control attenuator and a power amplifier; Digital phase shifter and numerical-control attenuator realize the regulable control of phase place, amplitude respectively by numerical control order, and its control interface is connected with hyperchannel width phase control extension set interface conversion circuit by control cables; Hyperchannel width phase control extension set interface conversion circuit distributes to the interface conversion of numerical control microwave part control command and data for realizing outside program control order; Hyperchannel width phase control Exgt Bat extension battery is used for in the width phase control passage of M road, microwave part is powered; Hyperchannel width phase control extension set input interface is for realizing the access of test and excitation signal, and this hyperchannel width phase control extension set input interface is connected with the source output terminal mouth of vector network analyzer; Hyperchannel width phase control extension set output interface is for realizing the output of M road width phase controlled stimulus signal, and the input port that this hyperchannel width phase control extension set output interface is corresponding with signal extraction extension set is connected; Signal extraction extension set comprises M road coupling network, three M select 1 switch, a signal extraction extension set interface conversion circuit, signal extraction Exgt Bat extension battery, a M signal extraction extension set input interface, a M signal extraction extension set output interface, a reference output interface, a monitoring output interface and a reflection output interface; Wherein, every road coupling network forms by three coupling mechanisms, be respectively used to realize excitation straight-through export with the coupling output of reference signal, encourage straight-through exports to lead directly to the coupling output of monitor signal and encouraging export and the coupling output of tested antenna-reflected echoed signal; Three M select the switching selection output that 1 switch is respectively used to realize the switching selection output of M road reference coupled signal, output and M road reflection coupling signal are selected in the switching of M road monitoring coupled signal; Signal extraction extension set interface conversion circuit selects the interface conversion of 1 switch control rule order and data to distribute for realizing outside program control order to three M; Signal extraction Exgt Bat extension battery is used for being that three M select 1 switch to power; Signal extraction extension set input interface is for realizing the access of pumping signal, and this signal extraction extension set input interface is connected with the output interface of hyperchannel width phase control extension set; Signal extraction extension set output interface is used for the output of the pumping signal after width phase control, and this signal extraction extension set output interface is configured to for being connected with the antenna element feeding interface of tested aerial array; Extract output with reference to output interface for reference realizing pumping signal after width phase control, this reference output interface is connected with receiver input port of vector network analyzer; Monitoring output interface extracts for the monitoring realizing pumping signal after width phase control and exports, and this monitoring output interface is connected with receiver input port of vector network analyzer; Reflection output interface exports for the extraction realizing tested antenna element reflection echo, and this reflection output interface is connected with receiver input port of vector network analyzer.
In addition, the invention allows for a kind of phased array antenna active refelction coefficient testing method, it adopts following technical scheme:
A kind of phased array antenna active refelction coefficient testing method, adopt above-mentioned phased array antenna active refelction coefficient test macro, the method comprises the steps:
Vector network analyzer port exports the pumping signal of setpoint frequency and power, this pumping signal enters the input interface of width phase control extension set, after M road power division network merit is divided, every road signal is through amplitude-phase adjustment and power amplification, entering signal extracts extension set, M road signal after independent width adjusts mutually is after coupling network, through connect signal is to tested aerial array feed, now, M antenna element is in feed condition simultaneously, and the amplitude-phase of the electric feed signal of each antenna element reception is independent controlled, therefore, the mutual coupling effect existed between antenna element is identical with array actual working state, now, measure the reflection coefficient of antenna element obtained identical with the active refelction coefficient under its actual working state, under main control computer controls, vector network analyzer receives the reflected signal and the reference signal extracted of coupling mechanism that coupling mechanism extracts simultaneously, after calibration with calculation process, directly draw the active refelction coefficient of tested antenna element, selected the switching of 1 switch by the M in signal extraction extension set, realize the active refelction coefficient test of M antenna element in tested aerial array respectively, under main control computer controls, vector network analyzer also receives the monitor signal that coupling mechanism extracts, in long-time test process, main control computer completes the monitor signal of extract real-time and the contrast of storage standards data automatically, if Real-Time Monitoring signal amplitude phase place exceeds specified thresholds, calibrate is carried out in main control computer prompting, and user is according to the duty of this monitoring channel real-time monitored system.
In addition, the invention allows for a kind of extension set calibration steps of phased array antenna active refelction coefficient test macro, this extension set calibration steps is for above-mentioned phased array antenna active refelction coefficient test macro;
This extension set calibration steps is specially: first system boot preheating, completes the dual-port calibration of vector network analyzer subsequently; The calibration line of each equipment of completion system; The frequency of operation when frequency of operation arranging vector network analyzer is phased array antenna active refelction coefficient index test, performance number when power is test; Arranging vector network analyzer test parameter is S21 and R2/R1, and wherein, S21 represents the width phase information of extension set passage, and R2/R1 represents the monitoring standard data of passage width phase information; Program control hyperchannel width phase control extension set; Change amplitude-phase controlled quentity controlled variable until meet the requirement of tested phased array antenna feed, gather and store S21 and R2/R1 amplitude-phase data corresponding to this passage; Complete the collection storage of remaining channel 2 to passage M corresponding S21 and R2/R1 amplitude-phase data successively; Under completing all working frequency successively according to above-mentioned steps, the collection of each channel data stores, and sets up extension set calibration data matrix, completes extension set calibration.
In addition, the invention allows for a kind of system calibration method of phased array antenna active refelction coefficient test macro, this extension set calibration steps is for above-mentioned phased array antenna active refelction coefficient test macro;
This system calibration method is specially: the first calibration line of each equipment in completion system; System boot preheating, arranges frequency of operation when vector network analyzer frequency of operation is phased array antenna active refelction coefficient index test subsequently, performance number when power is test; The test parameter arranging vector network analyzer is S21 and S11, wherein, and the monitor signal of S21 representative system passage, the reflected signal of S11 representative system passage; According to the controlled quentity controlled variable of extension set calibration data arranged in matrix hyperchannel width phase control extension set, maintenance arranges constant, the test trails arranging vector network analyzer is S11, open calibration menu, selection single port is calibrated, and utilizes calibrating device to complete the single port calibration of vector network analyzer, the calibration of completion system passage 1 while of calibrating complete according to prompting, the calibration of passage 2 to passage M is completed, final completion system calibration according to above-mentioned steps.
Tool of the present invention has the following advantages:
(1) present system produces while can realize multichannel width phase controlled stimulus signal, identical when feed condition during tested antenna measurement and real work, the active refelction coefficient of the direct test antenna unit of system, do not need to calculate, test process is succinct, manual operation is few, and test result validity is high;
(2) present system is by changing the controlled quentity controlled variable of hyperchannel width phase control extension set, realizes the feed of phased array antenna under different beams state, thus can complete the active refelction coefficient test of phased array antenna under different beams state of a control;
(3) present system possesses the real time monitoring function of excitation electric feed signal, can the amplitude-phase information of Real-time Obtaining excitation electric feed signal, can complete the real-time correction of amplitude phase error of excitation electric feed signal by coupling system software;
(4) the present invention calibrates the calibration algorithm utilizing vector network analyzer to carry, technology maturation, and calibration accurately, can meet the requirement of active refelction coefficient high precision measurement;
(5) after present system has been calibrated, test process is completely programme-controlled, and automaticity is high, and test speed is fast, and avoid artificial line to operate the error brought, measuring accuracy is high.
Accompanying drawing explanation
Fig. 1 is antenna array unit active refelction coefficient indirect test method schematic diagram in prior art;
Fig. 2 is a kind of phased array antenna active refelction coefficient test macro block diagram in the present invention;
Fig. 3 is the composition frame chart of hyperchannel 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 is the extension set calibration schematic flow sheet of a kind of phased array antenna active refelction coefficient test macro in the present invention;
Fig. 6 is the extension set calibration line graph of a kind of phased array antenna active refelction coefficient test macro in the present invention;
Fig. 7 is the system calibration schematic flow sheet of a kind of phased array antenna active refelction coefficient test macro in the present invention;
Fig. 8 is the system calibration line graph of a kind of phased array antenna active refelction coefficient test macro in the present invention;
Wherein, 1-vector network analyzer, 2-hyperchannel width phase control extension set, 3-signal extraction extension set, 4-main control computer, 5-calibrating device, 6-fixed ampllitude phase-compensated cable, the tested antenna element of 7-, 8-antenna element, 9-load, 10-vector network analyzer, 21-M road power division network, 22-width phase control passage, 23-hyperchannel width phase control extension set interface conversion circuit, 24-hyperchannel width phase control Exgt Bat extension battery, 25-hyperchannel width phase control extension set input interface, 26-hyperchannel width phase control extension set output interface, 221-digital phase shifter, 222-numerical-control attenuator, 223-power amplifier, 31-coupling network, 32, 33, 34-M selects 1 switch, 35-interface conversion circuit, 36-power supply, 37-input interface, 38-output interface, 39-is with reference to output interface, 40-monitors output interface, 41-reflects output interface, 311, 312, 313-coupling mechanism.
Embodiment
Embodiment 1
As shown in Figure 2, a kind of phased array antenna active refelction coefficient test macro, comprises vector network analyzer 1, hyperchannel 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 that signal produces and receives the main frame processed, and for generation of test and excitation signal, receives reference, reflection and monitor signal, can require the market ripe selecting corresponding frequency band according to test frequency.
Hyperchannel width phase control extension set 2 is configured to, for realizing test and excitation signal by the conversion of 1 road to M road, the independent amplitude phase control of M road signal, finally realize the output of M road width phase controlled stimulus signal.
Herein, M refers to the antenna element sum of tested aerial array.
As shown in Figure 3, hyperchannel width phase control extension set 2 comprises a M road power division network 21, M road width phase control passage 22, interface conversion circuit 23, power supply 24, input interface 25 and M output interface 26; Wherein,
The optional power splitter of M road power division network 21 realizes; Every road width phase control passage 22 is made up of a digital phase shifter 221, numerical-control attenuator 222 and a power amplifier 223, each parts design parameter is determined according to testing requirement design, wherein, digital phase shifter 221, numerical-control attenuator 222 realize the regulable control of phase place, amplitude respectively by numerical control order, control command can be serial, walk abreast, and its control interface is connected with interface conversion circuit 23 by control cables.
Interface conversion circuit 23 is for realizing the interface conversion and data distribution etc. of outside program control order to numerical control microwave part control command, 1 road serial ports or network interface or parallel port or USB port input can be designed to, the mode that multi-channel serial port or parallel port export, the realizations such as available programmable logic device (PLD), special purpose interface conversion chip, the present invention realizes not being described in detail to its specific design.
Power supply 24, for powering for microwave part in the width phase control passage of M road, designs according to the microwave part specifically selected, and the present invention realizes not being described to its specific design.
Input interface 25 realizes the access of pumping signal, and general connector can be selected to realize, and is connected with the source output terminal mouth of vector network analyzer in Fig. 21.
Output interface 26 realizes the output of M road width phase control pumping signal, and general connector can be selected to realize, and the input port corresponding with signal extraction extension set 3 in Fig. 1 is connected.
Signal extraction extension set 3 is configured to the straight-through output for realizing M road width phase controlled stimulus signal, and the reference of M road width phase controlled stimulus signal is coupled, monitoring is coupled, reflection coupling extracts, and switch control rule exports with selection.Concrete,
As shown in Figure 4, signal extraction extension set 3 selects 1 switch, 32,33,34, interface conversion circuit, 35, power supply 36, a M input interface 37, a M output interface 38, to form with reference to output interface 39, monitoring output interface 40 and a reflection output interface 41 by M road coupling network 31, three M.Wherein,
Every 1 road coupling network 31 (for coupling network 1) is all made up of 3 coupling mechanisms, wherein, coupling mechanism 311 is for encouraging the straight-through coupling output with reference signal that exports, coupling mechanism 312 is for encouraging the straight-through coupling output with monitor signal that exports, coupling mechanism 313 is for encouraging the straight-through coupling output with tested antenna-reflected echoed signal that exports, and coupling mechanism can select finished product microwave part or design to realize according to test request.
M selects 1 switch 32 to select to export for the switching of M road with reference to coupled signal, and its control signal is provided by interface conversion circuit 35, and powering 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 select to export for the switching of M road monitoring coupled signal, and its control signal is provided by interface conversion circuit 35, and powering 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 34 to select to export for the switching of M road reflection coupling signal, and its control signal is provided by interface conversion circuit 35, and powering 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 realizes 1 switch 32,33,34 control command is selected in outside program control order interface conversion and data distribution etc. to M, 1 road serial ports or network interface or parallel port or USB port input can be designed to, the mode that multi-channel serial port or parallel port export, the realizations such as available programmable logic device (PLD), special purpose interface conversion chip, the present invention realizes not being described in detail to its specific design.
Power supply 36 is powered for selecting 1 switch 32,33,34 for M, designs according to the microwave part specifically selected, and the present invention realizes not being described to its specific design.
Input interface 37 realizes the access of pumping signal, and general connector can be selected to realize, and is connected with the output interface 26 of hyperchannel width phase control extension set 2 in Fig. 2.
Output interface 38, for the output of the pumping signal after width phase control, can select general connector to realize, and is connected with the antenna element feeding interface of tested aerial array.
Extract output with reference to output interface 39 for the reference of the pumping signal after width phase control, general connector can be selected to realize, be connected with the receiver R1 input port of vector network analyzer in Fig. 2.
Monitoring output interface 40 extracts output for the monitoring of the pumping signal after width phase control, general connector can be selected to realize, be connected with the receiver B input port of vector network analyzer in Fig. 21.
Reflection output interface 41 exports for the extraction of tested antenna element reflection echo, general connector can be selected to realize, be connected with the receiver A input port of vector network analyzer in Fig. 21.
Main control computer (system software) 4 is configured to for the automatic control of whole system calibration with test.
Calibrating device 5 is configured to the calibration for completing whole system, the Electronic Calibration part that vector network analyzer 1 can be selected supporting or mechanical calibration kits, can require the market ripe selecting corresponding frequency band according to test frequency.
Fixed ampllitude phase-compensated cable 6 is configured to for realizing in system between relevant device and the connection of system and tested aerial array, can require the market ripe selecting corresponding frequency band according to test frequency.
Fixed ampllitude phase-compensated cable 6 comprises 6A, 6B, 6C tri-groups, and wherein, fixed ampllitude phase-compensated cable 6A is used for connection signal and extracts extension set 3 and 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, adopt the phased array antenna active refelction coefficient test macro in embodiment 1, the method comprises the steps:
Vector network analyzer 1 port exports the pumping signal of setpoint frequency and power, this signal enters the input interface 25 of width phase control extension set 2, after M road power division network 21 merit is divided, every road signal is through amplitude-phase adjustment and power amplification, entering signal extracts extension set 3, M road signal after independent width adjusts mutually is after coupling network 31, through connect signal is to tested aerial array feed, now, M antenna element is in feed condition simultaneously, and the amplitude-phase of the electric feed signal of each antenna element reception is independent controlled, therefore the mutual coupling effect existed between antenna element is identical with array actual working state, the active refelction coefficient now measured under the reflection coefficient of the antenna element obtained and its actual working state coincide.
Under main control computer (system software) 4 controls, vector network analyzer 1 receives the reflected signal and the reference signal extracted of coupling mechanism 311 that coupling mechanism 313 extracts simultaneously, after calibration with calculation process, directly can draw the active refelction coefficient of tested antenna element, selected the switching of 1 switch by the M in signal extraction extension set 3, the active refelction coefficient test of M antenna element in tested aerial array can be realized respectively.Under main control computer (system software) 4 controls, vector network analyzer 1 also can receive the monitor signal that coupling mechanism 312 extracts, in long-time test process, system software completes the monitor signal of extract real-time and the contrast of storage standards data automatically, if Real-Time Monitoring signal amplitude phase place exceeds specified thresholds, calibrate is carried out in system software prompting, and user according to this monitoring channel real-time monitored working state of system, can guarantee the measuring accuracy of whole system.
Embodiment 3
The extension set calibration steps of a kind of phased array antenna active refelction coefficient test macro in the present embodiment 3, for the phased array antenna active refelction coefficient test macro in embodiment 1, its objective is the calibration of amplitude and phase of hyperchannel width phase control extension set, signal extraction extension set, system cable.
Calibrate flow process as shown in Figure 5: first system boot preheating, complete the dual-port calibration of vector network analyzer subsequently; According to the calibration line of each equipment of Fig. 6 completion system; The frequency of operation when frequency of operation arranging vector network analyzer 1 is phased array antenna active refelction coefficient index test, performance number when power is test; Arranging vector network analyzer 1 test parameter is S21 and R2/R1, and wherein, S21 represents the width phase information of extension set passage, and R2/R1 represents the monitoring standard data of passage width phase information; Program control hyperchannel width phase control extension set 2; Change amplitude-phase controlled quentity controlled variable until meet the requirement of tested phased array antenna feed, gather and store S21 and R2/R1 amplitude-phase data corresponding to this passage; Complete the collection storage of remaining channel 2 to passage M corresponding S21 and R2/R1 amplitude-phase data successively; Under completing all working frequency successively according to above-mentioned steps, the collection of each channel data stores, and sets up extension set calibration data matrix, completes extension set calibration.
The present embodiment 3 utilizes system extension set collimation technique, do not need additionally to increase equipment, utilize the vector network analyzer 1 in system and equipment such as calibrating device 5 grade, by the different modes of connection, complete the calibration of amplitude and phase of hyperchannel width phase control extension set 2, signal extraction extension set 3, system cable, obtain hyperchannel extension set calibration data matrix.
Embodiment 4
The system calibration method of a kind of phased array antenna active refelction coefficient test macro in the present embodiment 4, for the phased array antenna active refelction coefficient test macro in embodiment 1, its objective is the calibration of whole system test port.
Calibrate flow process as shown in Figure 7: the calibration line first pressing each equipment in completion system shown in Fig. 8; System boot preheating, arranges frequency of operation when vector network analyzer 1 frequency of operation is phased array antenna active refelction coefficient index test subsequently, performance number when power is test; The test parameter arranging vector network analyzer 1 is S21 and S11, wherein, and the monitor signal of S21 representative system passage, the reflected signal of S11 representative system passage; According to the controlled quentity controlled variable of extension set calibration data arranged in matrix hyperchannel width phase control extension set, maintenance arranges constant, the test trails arranging vector network analyzer 1 is S11, open calibration menu, selection single port is calibrated, and utilizes calibrating device 5 to complete the single port calibration of vector network analyzer, the calibration of completion system passage 1 while of calibrating complete according to prompting, the calibration of passage 2 to passage M is completed, final completion system calibration according to above-mentioned steps.
The calibration algorithm that the present embodiment 4 utilizes the hardware device of test macro itself and vector network analyzer 1 to carry, realize the calibration of whole system test port, calibration steps is simple, and calibration accuracy is high, effectively can ensure measuring accuracy.
Certainly; more than illustrate and be only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this instructions; made all equivalently to substitute, obvious form of distortion, within the essential scope all dropping on this instructions, protection of the present invention ought to be subject to.
Claims (5)
1. a phased array antenna active refelction coefficient test macro, is characterized in that, comprises vector network analyzer, hyperchannel 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 configured to for generation of test and excitation signal, receives reference, reflection and monitor signal;
Hyperchannel width phase control extension set is configured to, for realizing test and excitation signal by the conversion of 1 road to M road, the independent amplitude phase control of M road signal, finally realize the output of M road width phase controlled stimulus signal;
Signal extraction extension set is configured to the straight-through output for realizing M road width phase controlled stimulus signal, and the reference of M road width phase controlled stimulus signal is coupled, monitoring is coupled, reflection coupling extracts, and switch control rule exports with selection;
Main control computer is configured to for realizing the automatic control of whole system calibration with test;
Calibrating device is configured to the calibration for completing whole system;
Fixed ampllitude phase-compensated cable is configured to for realizing in system between relevant device and the connection of system and tested aerial array.
2. a kind of phased array antenna active refelction coefficient test macro according to claim 1, it is characterized in that, hyperchannel width phase control extension set comprises a M road power division network, M road width phase control passage, a hyperchannel width phase control extension set interface conversion circuit, a hyperchannel width phase control Exgt Bat extension battery, a hyperchannel width phase control extension set input interface and M hyperchannel width phase control extension set output interface; Wherein, every road width phase control passage is made up of a digital phase shifter, a numerical-control attenuator and a power amplifier; Digital phase shifter and numerical-control attenuator realize the regulable control of phase place, amplitude respectively by numerical control order, and its control interface is connected with hyperchannel width phase control extension set interface conversion circuit by control cables; Hyperchannel width phase control extension set interface conversion circuit distributes to the interface conversion of numerical control microwave part control command and data for realizing outside program control order; Hyperchannel width phase control Exgt Bat extension battery is used for in the width phase control passage of M road, microwave part is powered; Hyperchannel width phase control extension set input interface is for realizing the access of test and excitation signal, and this hyperchannel width phase control extension set input interface is connected with the source output terminal mouth of vector network analyzer; Hyperchannel width phase control extension set output interface is for realizing the output of M road width phase controlled stimulus signal, and the input port that this hyperchannel width phase control extension set output interface is corresponding with signal extraction extension set is connected; Signal extraction extension set comprises M road coupling network, three M select 1 switch, a signal extraction extension set interface conversion circuit, signal extraction Exgt Bat extension battery, a M signal extraction extension set input interface, a M signal extraction extension set output interface, a reference output interface, a monitoring output interface and a reflection output interface; Wherein, every road coupling network forms by three coupling mechanisms, be respectively used to realize excitation straight-through export with the coupling output of reference signal, encourage straight-through exports to lead directly to the coupling output of monitor signal and encouraging export and the coupling output of tested antenna-reflected echoed signal; Three M select the switching selection output that 1 switch is respectively used to realize the switching selection output of M road reference coupled signal, output and M road reflection coupling signal are selected in the switching of M road monitoring coupled signal; Signal extraction extension set interface conversion circuit selects the interface conversion of 1 switch control rule order and data to distribute for realizing outside program control order to three M; Signal extraction Exgt Bat extension battery is used for being that three M select 1 switch to power; Signal extraction extension set input interface is for realizing the access of pumping signal, and this signal extraction extension set input interface is connected with the output interface of hyperchannel width phase control extension set; Signal extraction extension set output interface is used for the output of the pumping signal after width phase control, and this signal extraction extension set output interface is configured to for being connected with the antenna element feeding interface of tested aerial array; Extract output with reference to output interface for reference realizing pumping signal after width phase control, this reference output interface is connected with receiver input port of vector network analyzer; Monitoring output interface extracts for the monitoring realizing pumping signal after width phase control and exports, and this monitoring output interface is connected with receiver input port of vector network analyzer; Reflection output interface exports for the extraction realizing tested antenna element reflection echo, and this reflection output interface is connected with receiver input port of vector network analyzer.
3. a phased array antenna active refelction coefficient testing method, adopt a kind of phased array antenna active refelction coefficient test macro as claimed in claim 2, it is characterized in that, the method comprises the steps:
Vector network analyzer port exports the pumping signal of setpoint frequency and power, this pumping signal enters the input interface of width phase control extension set, after M road power division network merit is divided, every road signal is through amplitude-phase adjustment and power amplification, entering signal extracts extension set, M road signal after independent width adjusts mutually is after coupling network, through connect signal is to tested aerial array feed, now, M antenna element is in feed condition simultaneously, and the amplitude-phase of the electric feed signal of each antenna element reception is independent controlled, therefore, the mutual coupling effect existed between antenna element is identical with array actual working state, now, measure the reflection coefficient of antenna element obtained identical with the active refelction coefficient under its actual working state, under main control computer controls, vector network analyzer receives the reflected signal and the reference signal extracted of coupling mechanism that coupling mechanism extracts simultaneously, after calibration with calculation process, directly draw the active refelction coefficient of tested antenna element, selected the switching of 1 switch by the M in signal extraction extension set, realize the active refelction coefficient test of M antenna element in tested aerial array respectively, under main control computer controls, vector network analyzer also receives the monitor signal that coupling mechanism extracts, in long-time test process, main control computer completes the monitor signal of extract real-time and the contrast of storage standards data automatically, if Real-Time Monitoring signal amplitude phase place exceeds specified thresholds, calibrate is carried out in main control computer prompting, and user is according to the duty of this monitoring channel real-time monitored system.
4. the extension set calibration steps of a phased array antenna active refelction coefficient test macro, for a kind of phased array antenna active refelction coefficient test macro according to claim 1, it is characterized in that, this extension set calibration steps is specially: first system boot preheating, completes the dual-port calibration of vector network analyzer subsequently; The calibration line of each equipment of completion system; The frequency of operation when frequency of operation arranging vector network analyzer is phased array antenna active refelction coefficient index test, performance number when power is test; Arranging vector network analyzer test parameter is S21 and R2/R1, and wherein, S21 represents the width phase information of extension set passage, and R2/R1 represents the monitoring standard data of passage width phase information; Program control hyperchannel width phase control extension set; Change amplitude-phase controlled quentity controlled variable until meet the requirement of tested phased array antenna feed, gather and store S21 and R2/R1 amplitude-phase data corresponding to this passage; Complete the collection storage of remaining channel 2 to passage M corresponding S21 and R2/R1 amplitude-phase data successively; Under completing all working frequency successively according to above-mentioned steps, the collection of each channel data stores, and sets up extension set calibration data matrix, completes extension set calibration.
5. the system calibration method of a phased array antenna active refelction coefficient test macro, for a kind of phased array antenna active refelction coefficient test macro according to claim 1, it is characterized in that, this system calibration method is specially: the first calibration line of each equipment in completion system; System boot preheating, arranges frequency of operation when vector network analyzer frequency of operation is phased array antenna active refelction coefficient index test subsequently, performance number when power is test; The test parameter arranging vector network analyzer is S21 and S11, wherein, and the monitor signal of S21 representative system passage, the reflected signal of S11 representative system passage; According to the controlled quentity controlled variable of extension set calibration data arranged in matrix hyperchannel width phase control extension set, maintenance arranges constant, the test trails arranging vector network analyzer is S11, open calibration menu, selection single port is calibrated, and utilizes calibrating device to complete the single port calibration of vector network analyzer, the calibration of completion system passage 1 while of calibrating complete according to prompting, the calibration of passage 2 to passage M is completed, final completion system calibration according to above-mentioned steps.
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