CN106443211B - It is a kind of suitable for the integrated correction system of different Active Arrays and bearing calibration - Google Patents
It is a kind of suitable for the integrated correction system of different Active Arrays and bearing calibration Download PDFInfo
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Abstract
The present invention relates to a kind of suitable for the integrated correction system of different Active Arrays and bearing calibration, comprising: Active Arrays, high-acruracy survey real-time compensation unit, test probe, industrial personal computer, vector network analyzer, RF cable, low-frequency cable；The present invention has correction accuracy height, correction time short, simply, is easily achieved, has the advantages that strong versatility, has good Project Realization.
Description
Technical field
The present invention relates to the correction system of Active Arrays and bearing calibration, especially one kind to have suitable for difference
The correction system of source array antenna and bearing calibration.The invention belongs to antenna technical fields.
Background technique
With the development of the technologies such as microelectronics, microwave and millimeter wave, antenna, material, manufacture, technique and encapsulation, satellite is led
Being constantly progressive for the platforms such as bullet, aircraft is communicated, is navigated, scouting, to count the fields such as biography, radar, energy transmission, microwave weapon military
It is improved with the demand of civilian demand, Active Arrays application is more and more wider.Active Arrays are to meet technology development and answer
With demand, the scale of array is increasing, frequency is higher and higher, integrated level is higher and higher, function becomes increasingly complex, performance indicator
Higher and higher, lead time and cost requirement reduce, it is necessary to using integrated alignment technique.
The country's two second phase in generation inter-satellite links of navigation use Ka frequency range phased array antenna, and antenna is active, transmitting-receiving half-duplex
System, aerial array scale is big, scanning angle is big, cell spacing is small, interchannel mutual coupling is strong, while antenna being required to have high sweep
Retouch efficiency, low sidelobe level；The compression lead time is required in subsequent networking star, reduces development cost, optimization development process,
A kind of quick integral bearing calibration must be used thus, can be realized the integration of correction and antenna radiation characteristics test.
Active Arrays are requirement that functional performance difference, application site and the carrying platform difference completed, antenna tool
Body forms and differs greatly, currently, colleges and universities and scientific research institution propose the different type applied to Active Arrays both at home and abroad
Alignment technique, include mainly interior correction and outer correction, interior correction do not account for each radiating element performance difference, generally require
Increase corrective network, increase product design complexity；Each channel integral including radiating element is completed in outer correction
Correction, timing is consistent with the time of day of product, is suitable for different frequency range, different type product.There are many outer bearing calibration, main
To include planar near-field, matrix inversion, FFT, commutation method, BIT traveling wave coupling feed, CCE, UTE, REV method, be based on mutual coupling measurement
Deng.
Planar near-field technology measures the amplitude and phase that tested antenna aperature is entered the court using probe antenna near field, according to
The radiated far field of electromagnetic field plane wave expansion theoretical calculation phased array antenna, to obtain the radiation feature ginseng of phased array antenna
Number, this method is needed to antenna and probe progress accurate calibration, probe scanning control is accurate, sampled data output is big, data processing
It is complicated；Matrix inversion method is a kind of far field calibration method, needs the Distance Test field of entire array antenna, auxiliary antenna and turns
Platform system measures amplitude and phase in N number of scheduled Angle Position, then obtains the width of antenna aperture distribution by matrix inversion operation
Degree and phase value, this method need that darkroom far field is big, test position is more, and processing is complicated, poor universality；FFT calibration method need by
Traveling wave feeding network is added between the array element and digital phase shifter of tested antenna, is realized to the approximate constant amplitude of antenna aperture and linear
Phase excitation, so that simulation far field is believed in the case where both placing near field probe without antenna measurement field or not before antenna aperature
Number reception, with FFT substitution matrix inversion obtain the amplitude and phase value in channel.This method increases Antenna Design complexity, leads to
It is not strong with property；Mutual coupling calibration method is completed channel using the element mutual coupling of Active Arrays and is calibrated, and this method has array grid
Limitation, while correction accuracy is big by SNR influence, versatility is impacted；When UTE calibration method is used for straightening die matroid array antenna
It needs plus additional hardware after phase shifter, to provide accurate Signal coding, this method increase product design complexity
Degree, versatility be not strong；CCE calibration method is needed using relevant Detection and Extraction phase information, and correction of complex degree is higher, and needs to increase
Add an additional reference channel, this method increase product design complexity, versatility is not strong；BIT traveling wave coupling feed method
It needs to increase in the design correction hardware, increases product design, versatility is limited；REV calibration method is a kind of more general school
Quasi- technology, this method cannot directly obtain complete rotational circle for digital phase shifter, and single channel status variation is made an uproar by channel
Sound and measurement error are affected, and need to solve the practical relative amplitude gain and phase shift of each state of phase shifter, amount of test data
Greatly, processing is complex, resource-constrained for larger spaceborne phased array antenna；Commutation method measures phased array antenna difference and matches phase
Then the reception signal width phase popped one's head under state handle to experimental data and then determines arbitrarily to match phase shape with mathematical algorithm
The excitation width phase in each channel, this method take full advantage of the controllable feature of phased array antenna phase, can greatly reduce phased under state
Array antenna measurement and Diagnostic Time, the requirement to test environment is relatively low, has very strong practicability, but this method is generally wanted
Asking single channel work, channel is the load port for meeting correction and increasing TR component, increases product design complexity, while mesh
Preceding commutation method requires phase shifter to carry out multiple groups phase configuration, for extensive spaceborne Active Arrays, increases resource
Demand.
Correction demand in view of different type Active Arrays feature and task development to Active Arrays channel, school
Correction method should it is simple, correction accuracy is high, correction time is short, is easily achieved, different types of Active Phased Array can be suitable for again
Array antenna.Existing disclosed or known bearing calibration is difficult to meet above-mentioned application requirement.
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the shortcomings of existing bearing calibration, provides a kind of suitable for different Active Phased Arrays
The integrated correction system of array antenna and bearing calibration have correction accuracy height, correction time short, simply, are easily achieved, have
The advantages of strong versatility, has good Project Realization.
Technical solution of the invention: a kind of integrated correction system suitable for different Active Arrays, it is special
Sign is to include: Active Arrays (1), high-acruracy survey real-time compensation unit (2), test probe (3), industrial personal computer (4), arrow
Measure Network Analyzer (5), RF cable (6), low-frequency cable (7)；Active Arrays (1) are product to be corrected, each RF channel
With phase shift, decaying and add cut-off capacity, is connected by low-frequency cable (7) with industrial personal computer；High-acruracy survey real-time compensation list
First (2) are that the access of RF signal is realized by the control of industrial personal computer with the microwave component to RF signal path and short-circuit function
And short-circuit condition, compensation RF cable shake, the fluctuation of vector network analyzer amplitude and phase, the temperature drift survey of vector network analyzer
Measure error；Test probe (3) is used to receive the RF signal of Active Arrays (1), or emits RF to Active Arrays (1)
Signal, test probe (3) are placed in the far field of Active Arrays (1), and, mouth face parallel with the mouth face of Active Arrays (1)
Center alignment；Each RF channel that industrial personal computer (4) on the one hand controls Active Arrays (1) completes phase shift, decaying and plus power-off
Configuration；Amplitude and phase of the industrial personal computer (4) also to the measurement of Active Arrays (1) each RF channel, pass through modified tri-state
Correcting algorithm is handled, and the correction of Active Arrays (1) RF channel is completed；On the other hand control high-acruracy survey real-time compensation
Unit (2) makes high-acruracy survey real-time compensation unit (2) be placed in access or short-circuit condition；The third aspect also controls vector network
Analyzer (5) reads the amplitude and phase of Active Arrays (1) each RF channel, while receiving control vector network analyzer
(5) amplitude and phase for each RF channel passed back；Vector network analyzer (5) both ends and precision measure real-time compensation unit
(2) it is connected with test probe (3), vector network analyzer (5) and Active Arrays (1), high-acruracy survey real-time compensation list
First (2) and test probe (3) form the circuit RF by RF cable (6)；Low-frequency cable (7) completes Active Arrays (1), high-precision
The connection of degree measurement real-time compensation unit (2), industrial personal computer (4) and vector network analyzer (5), guarantees industrial personal computer (4) realization pair
High-acruracy survey real-time compensation unit (2), the control of vector network analyzer (5), the power supply of Active Arrays (1).
Each RF channel of industrial personal computer (4) control Active Arrays (1) completes phase shift, decaying and the shape for adding power-off
The process of state configuration is as follows:
(1) each RF channel of Active Arrays is powered on；
(2) decay to the 1 phase shifter zero setting phase shift of Active Arrays RF channel, attenuator zero setting, its other than RF channel 1
Its RF channel attenuator sets maximum attenuation, the phase of adjacency channel phase shifter sets 0 degree and 180 degree respectively；
(3) 120 degree of phase shifts are set to the phase shifter of Active Arrays RF channel 1, attenuator zero setting decays, other RF channels
The setting for setting state remains unchanged；
(4) 240 degree of phase shifts are set to the phase shifter of Active Arrays RF channel 1, attenuator zero setting decays, other RF channels
It installs and remains unchanged；
(5) step (2), (3), (4) are repeated, phase shift, the decaying configuration of other RF channels are completed；
(6) (1) powers off each RF channel of Active Arrays.
The access and short-circuit condition of RF signal, the shake of compensation RF cable, vector network point are realized in the control of the industrial personal computer
Analyzer amplitude and phase fluctuation, vector network analyzer temperature drift measurement error process:
Industrial personal computer control high-acruracy survey real-time compensation unit is placed in channel status, and vector network analyzer measures each RF
The amplitude and phase in channel；Industrial personal computer control high-acruracy survey real-time compensation unit is placed in short-circuit condition, vector network analyzer
Measure the amplitude and phase of each RF channel；Above-mentioned measurement result twice is subtracted each other, that is, eliminates the shake of RF cable, vector network
Analyzer amplitude and phase fluctuation, vector network analyzer temperature drift measurement error.
When the survey test probe is placed in the far field of Active Arrays, far field distance meets d >=2D2/ λ, d are that test is visited
Distance between head and Active Arrays, D are Active Arrays caliber size, and λ is that the working frequency of Active Arrays is corresponding
Wavelength, reduced in this way to test environmental requirement, while realizing that correction and antenna radiation characteristics are test integrated, mention
High Active Arrays development efficiencies.
The amendment tri-state commutation correcting algorithm is modified three using 6 measurement data of each RF channel to be corrected
The processing of state commutation correcting algorithm, specific as follows:
(1) timing measured value
1. RF channel phase shifter to be corrected sets 0 degree of phase shift, corresponding high-acruracy survey real-time compensation unit is measured for the first time and is set
Channel status, measured value areA1For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation list
Member sets short-circuit condition, measured value isA1' for amplitude,For phase；
2. RF channel phase shifter to be corrected sets 120 degree of phase shifts, corresponding high-acruracy survey real-time compensation unit is measured for the first time
Set channel status, measured value isA2For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation
Unit sets short-circuit condition, measured value isA2' for amplitude,For phase；
3. RF channel phase shifter to be corrected sets 240 degree of phase shifts, corresponding high-acruracy survey real-time compensation unit is measured for the first time
Set channel status, measured value isA3For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation
Unit sets short-circuit condition, measured value isA3' for amplitude,For phase；
(2) correction process of measured value
To measuring amplitude and phase value A1、A1′、A2、A2′、A3、A3′、By formula (1),
(2), (3) are handled, and obtain intermediate quantity w11、w12、w21、w22、w31、w32；
To w11、w12、w21、w22、w31、w32By formula (4), (5), (6) processing, intermediate quantity e is obtainedl1、el2、d1；
To el1、el2、d1It is handled by formula (7), (8), obtains intermediate quantity v1、v2；
To v1、v2By formula (9), (10) handle, respectively obtain amplitude alpha, the phase beta in channel to be corrected, as formula (9),
(10) shown in.
A kind of integrated bearing calibration suitable for different Active Arrays, including Active Arrays emission state school
Just with the correction course of Active Arrays reception state；The correction course and active array day of Active Arrays reception state
The correction of line emission state is similar, is its inverse process；Active Arrays emission state correction course is as follows:
(1) Active Arrays channel 1 measures
1. being powered on to each RF channel of Active Arrays；
2. 1 phase shifter zero setting phase shift of channel, attenuator zero attenuation, other channel faders set maximum attenuation, adjacency channel
Phase shifter phase sets 0 degree and 180 degree respectively；
3. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, make high-acruracy survey real-time compensation list
Member sets channel status；
4. industrial personal computer control vector network analyzer adds RF signal, vector network analyzer measures the amplitude and phase of RF channel
Position data, return industrial personal computer；
5. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, make high-acruracy survey real-time compensation list
First state sets short-circuit condition, and other parts states remain unchanged；
6. industrial personal computer control vector network analyzer adds RF signal, vector network analyzer measures the amplitude and phase of RF channel
Position data, return industrial personal computer；
7. 1 phase shifter of channel sets 120 degree of phase shifts, attenuator zero setting decaying, other channel faders set maximum attenuation, adjacent
Channel phase shifter phase sets 0 degree and 180 degree respectively；
8. repeating step 3., 4., 5., 6.；
9. 1 phase shifter of channel sets 240 degree of phase shifts, attenuator zero setting decaying, other channel faders set maximum attenuation, adjacent
Channel phase shifter phase sets 0 degree and 180 degree respectively；
10. repeating step 3., 4., 5., 6.；
(2) measurement in the other channels of Active Arrays
It repeats step (1), is gradually completing the measurement in the other each channels of Active Arrays；
(3) Active Arrays width phase trim
Industrial personal computer corrects each RF channel amplitude and phase data of passback using the amendment tri-state commutation in industrial personal computer
Algorithm is handled, and is calculated the amplitude and phase of each RF channel with level values, is obtained each RF channel of Active Arrays and move
Each RF channel control code is sent into Active Arrays by industrial personal computer low-frequency cable by the control code of phase device and attenuator, real
The each RF channel correction of Active Arrays is completed in the refreshing of existing each RF channel phase shifter and attenuator.
The advantages of the present invention over the prior art are that:
(1) present invention has correction accuracy height, correction time short, simply, is easily achieved, with the excellent of strong versatility
Point has good Project Realization.
(2) combined high precision measurement real-time compensation unit open of the present invention and short-circuit two states, propose modified tri-state
Commutation correcting algorithm, sets maximum attenuation by non-correction channel attenuator, adjacency channel phase shifter sets 0 degree and 180 degree respectively, greatly
Active Arrays correction time is reduced greatly；It is arranged by non-correction channel attenuator and phase shifter, reduces non-correction channel
Influence to correction channel measurement, improves correction accuracy；The requirement to test macro is reduced, the logical of bearing calibration is realized
The property used.
(3) imported high precision measures real-time compensation unit in correction system of the invention, reduces RF cable and vector net
Influence of the network analyzer error to measurement result, improves correction accuracy, reduces wanting for RF cable and vector network analyzer
It asks, high-acruracy survey real-time compensation unit of the present invention can be not only used for the correction of active array, can be used for other RF chains
The test on road can be improved measurement accuracy, reduce the requirement to test macro and equipment.
(4) present invention makes full use of the characteristics of each RF channel phase shifter of Active Arrays and attenuator flexible configuration,
The correcting scheme for simplifying common Active Arrays, without changing Active Arrays design, versatile, tool because of correction
There is apparent practicability；
(5) Active Arrays and test probe are motionless in the present invention, do not need mechanical rotation, and reducing needs resource
It asks.Industrial personal computer changes Active Arrays RF channel configuration status by low-frequency cable, realizes the automation of correction, reduces people
Power demand has strong competitiveness and market value；
Detailed description of the invention
Fig. 1 is to correct system schematic suitable for different Active Arrays integrations；
Fig. 2 is modified tri-state commutation law vector figure；
Fig. 3 is Antenna Pattern Measuring Test result (0 degree of scan angle) figure based on regular channels bearing calibration；
Fig. 4 is Antenna Pattern Measuring Test result (0 degree of scan angle) figure based on integrated bearing calibration；
Fig. 5 is Antenna Pattern Measuring Test result (45 degree of scan angles) figure based on regular channels bearing calibration；
Fig. 6 is Antenna Pattern Measuring Test result (45 degree of scan angles) figure based on integrated bearing calibration.
Specific embodiment
The present invention is described in detail With reference to embodiment.
1. correcting system and method
As shown in Figure 1, correction system of the invention include: Active Arrays 1, high-acruracy survey real-time compensation unit 2,
Correction test probe 3, industrial personal computer 4, vector network analyzer 5, RF cable 6, low-frequency cable 7；Industrial personal computer by low-frequency cable with
Active Arrays communication, completes the channel status configuration of Active Arrays, and industrial personal computer is surveyed by low-frequency cable and high-precision
Real-time compensation unit communication is measured, realizes access and short-circuit two states setting；Industrial personal computer is communicated with appropriate Network Analyzer, is realized
The control of vector network analyzer, the reading of amplitude and phase data；Active Arrays correction is implemented as follows:
(1) correction system is established: test probe is set up according to the far field required distance of Active Arrays, and test is visited
Head is parallel with the mouth face of Active Arrays, aperture centre alignment, according to each equipment of Fig. 1 connection；
(2) correction system power-up: Active Arrays, high-acruracy survey real-time compensation unit, vector network analyzer etc.
The power-up of each equipment；
(3) correction of Active Arrays channel 1 measurement
Industrial personal computer completes the power supply of Active Arrays by low-frequency cable and channel configures, and carries out channel 1 and corrects, specifically
Are as follows:
1. 1 phase shifter zero setting phase shift of channel, attenuator zero attenuation, other channel faders set maximum attenuation, adjacency channel
Phase shifter phase sets 0 degree and 180 degree respectively；
2. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, its state is made to set channel status；
3. industrial personal computer control vector network analyzer adds RF signal, the width of vector network analyzer is read by low-frequency cable
Degree and phase data；
4. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, its state is made to set short-circuit condition；
5. other settings remain unchanged in addition to high-acruracy survey real-time compensation unit, vector network analyzer amplitude is read
And phase data；
6. 1 phase shifter of channel sets 120 degree of phase shifts, attenuator zero setting decaying, other channels install and remain unchanged；
7. repeat step 2., twice respectively read vector network analyzer amplitude and phase data
4. repeating step 2., vector network analyzer amplitude and phase data are read respectively twice；
5. 240 degree of phase shifts, zero attenuations are set in channel 1, other channels, which install, remains unchanged (maximum attenuation, adjacency channel phase
Position is arranged for 0 degree and 180 degree reverse phase)；
6. repeating step 2., 3., 4., 5., the amplitude and phase reading data of vector network analyzer is completed；
(4) 1 correction process of channel
According to 6 width phase datas that step (3) are read, industrial personal computer meter is corrected at data using modified correcting algorithm
Reason, obtains the initial amplitude and phase number in channel 1 to be corrected；
(5) correction in other channels
It repeats step (3) and (4), completes the correction in other channels, respectively obtain initial width and be mutually worth；
(6) Active Arrays width phase trim
The each channel amplitude and phase initial value obtained according to step (4) and (5), by correcting algorithm in industrial personal computer into
Row processing, obtains the control code of Active Arrays each channel phase shifter and attenuator, will be each by industrial personal computer low-frequency cable
A channel control code is sent into the beam-controller of Active Arrays, realizes the refreshing of each channel phase shifter and attenuator, most
The each channel amplitude and phase correction of Active Arrays is completed eventually.
2, modified tri-state commutation correcting algorithm introduction
The phase of the unit to be corrected excitation of test for the first time is 0 °, and the phase shifter phase shift of second of excitation is 120 °, the
The phase shifter phase shift motivated three times is 240 °, and non-correction unit sets maximum attenuation, adjacency channel phase sets 0 ° and 180 ° instead respectively
Phase realizes non-correction channel interference cancellation, reduces its interference effect for treating correction channel.High-acruracy survey real-time compensation list
Member is set to access and short-circuit two kinds of shapes under the same amplitude and phase facilities in Active Arrays channel to be corrected respectively
State.
The corresponding phase shift state three times of RF channel to be corrected, combined high precision measure real-time compensation unit access and short-circuit condition,
Carry out 6 amplitude and phase measurements.6 width phase test vector values of Active Arrays RF channel to be corrected on a complex plane can
A circle is formed, as shown in Figure 1, It is RF channel 6 times to be corrected
The vector signal of measurement, aejβFor the actual margin and phase of RF channel to be corrected to be asked.Its radius justified is channel to be measured
Actual magnitude, while the actual phase in channel to be measured can be acquired, main algorithm is as follows.
(1) timing measured value
1. RF channel phase shifter to be corrected sets 0 degree of phase shift, corresponding high-acruracy survey real-time compensation unit is measured for the first time and is set
Channel status, measured value areA1For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation list
Member sets short-circuit condition, measured value isA1' for amplitude,For phase；
2. RF channel phase shifter to be corrected sets 120 degree of phase shifts, corresponding high-acruracy survey real-time compensation unit is measured for the first time
Set channel status, measured value isA2For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation
Unit sets short-circuit condition, measured value isA2' for amplitude,For phase；
3. RF channel phase shifter to be corrected sets 240 degree of phase shifts, corresponding high-acruracy survey real-time compensation unit is measured for the first time
Set channel status, measured value isA3For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation
Unit sets short-circuit condition, measured value isA3' for amplitude,For phase；
(2) correction process of measured value
To measuring amplitude and phase value A1、A1′、A2、A2′、A3、A3′、By formula (1),
(2), (3) are handled, and obtain intermediate quantity w11、w12、w21、w22、w31、w32；
To w11、w12、w21、w22、w31、w32By formula (4), (5), (6) processing, intermediate quantity e is obtainedl1、el2、d1；
To el1、el2、d1It is handled by formula (7), (8), obtains intermediate quantity v1、v2；
To v1、v2By formula (9), (10) handle, respectively obtain amplitude alpha, the phase beta in channel to be corrected, as formula (9),
(10) shown in.
A kind of non-correction of Active Arrays carried out according to general Active Arrays correct application demand of the present invention is logical
The low interference setting in road, specially attenuator sets maximum attenuation, adjacency channel phase shifter sets 0 degree and 180 degree respectively；And ingenious introduction
High-acruracy survey real-time compensation unit access and short-circuit condition setting, improve measuring accuracy；And has and innovatively propose to repair
Positive tri-state commutation correcting algorithm, that is, realize and be not required to increase Antenna Design complexity because of correction, and can be adapted for different type
Active Arrays integration correction, obtain high efficiency and high correction accuracy, few, logical to correction resource and site requirements
It with the strong bearing calibration of property, realizes antenna calibration and radiation characteristic is test integrated, meet different Active Arrays corrections
Application demand.
High-acruracy survey real-time compensation method improves the measurement accuracy of conventional RF test macro, provides high-precision RF chain
The novelty of drive test amount thought.
It is phased after Fig. 3 carries out the trim of width phase using conventional method for the second stage of inter-satellite link Ka frequency range phased array antenna of navigating
The corresponding normalization antenna pattern test curve of 0 degree of scan angle of array antenna, curve indicate pair of signal amplitude and different angle
It should be related to, ordinate is RF signal amplitude size, unit decibel, and abscissa is angle, unit degree.
Fig. 4 is to navigate the second stage of inter-satellite link Ka frequency range phased array antenna using integrated bearing calibration progress width of the invention
After phase trim, the corresponding normalization antenna pattern test curve of 0 degree of scan angle of phased array antenna, curve indicate signal amplitude with
The corresponding relationship of different angle, ordinate are RF signal amplitude size, unit decibel, and abscissa is angle, unit degree.
It is phased after Fig. 5 carries out the trim of width phase using conventional method for the second stage of inter-satellite link Ka frequency range phased array antenna of navigating
The corresponding normalization antenna pattern test curve of 45 degree of scan angles of array antenna, curve indicate pair of signal amplitude and different angle
It should be related to, ordinate is RF signal amplitude size, unit decibel, and abscissa is angle, unit degree.
Fig. 6 is to navigate the second stage of inter-satellite link Ka frequency range phased array antenna using integrated bearing calibration progress width of the invention
After phase trim, the corresponding normalization antenna pattern test curve of 45 degree of scan angles of phased array antenna, curve indicates signal amplitude
With the corresponding relationship of different angle, ordinate is RF signal amplitude size, unit decibel, and abscissa is angle, unit degree.
Claims (5)
1. a kind of integrated correction system suitable for different Active Arrays, characterized by comprising: Active Arrays,
High-acruracy survey real-time compensation unit, test probe, industrial personal computer, vector network analyzer, RF cable and low-frequency cable；Active Phased Array
Array antenna is product to be corrected, and each RF channel has phase shift, decaying and adds cut-off capacity, passes through low-frequency cable and industrial personal computer phase
Connection；High-acruracy survey real-time compensation unit is to pass through industrial personal computer with the microwave component to RF signal path and short-circuit function
Control realize RF signal access and short-circuit condition, compensation RF cable shake, vector network analyzer amplitude and phase fluctuation,
The temperature drift measurement error of vector network analyzer；Test the RF signal popped one's head in for receiving Active Arrays, or to active
Array antenna emits RF signal, and test probe is placed in the far field of Active Arrays, and parallel with the mouth face of Active Arrays,
Aperture centre alignment；On the one hand each RF channel that industrial personal computer controls Active Arrays completes phase shift, decaying and adds power-off
Configuration；Amplitude and phase data of the industrial personal computer also to the measurement of Active Arrays each RF channel, pass through modified tri-state commutation
Correcting algorithm is handled, and the correction of Active Arrays RF channel is completed；On the other hand control high-acruracy survey real-time compensation
Unit makes high-acruracy survey real-time compensation unit be placed in access or short-circuit condition；The third aspect also controls vector network analyzer
The amplitude and phase of each RF channel of Active Arrays are read, while receiving each RF channel that vector network analyzer is passed back
Amplitude and phase；Vector network analyzer both ends and high-acruracy survey real-time compensation unit and test probe connection, vector net
Network analyzer and Active Arrays, high-acruracy survey real-time compensation unit and test probe pass through the RF cable composition circuit RF；
Low-frequency cable completes the connection of Active Arrays high-acruracy survey real-time compensation unit, industrial personal computer and vector network analyzer,
Guarantee that industrial personal computer is realized to high-acruracy survey real-time compensation unit, the control of vector network analyzer, the confession of Active Arrays
Electricity；
Wherein, the amendment tri-state commutation correcting algorithm is modified three using 6 measurement data of each RF channel to be corrected
The processing of state commutation correcting algorithm, specific as follows:
(1) timing measured value
1. RF channel phase shifter to be corrected sets 0 degree of phase shift, corresponding high-acruracy survey real-time compensation unit is measured for the first time and sets access
State, measured value areA1For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation unit and sets
Short-circuit condition, measured value areA′1For amplitude,For phase；
2. RF channel phase shifter to be corrected sets 120 degree of phase shifts, the corresponding high-acruracy survey real-time compensation unit of measurement for the first time is set logical
Line state, measured value areA2For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation unit
Set short-circuit condition, measured value isA′2For amplitude,For phase；
3. RF channel phase shifter to be corrected sets 240 degree of phase shifts, the corresponding high-acruracy survey real-time compensation unit of measurement for the first time is set logical
Line state, measured value areA3For amplitude,For phase；Second of measured value corresponds to high-acruracy survey real-time compensation unit
Set short-circuit condition, measured value isA3' for amplitude,For phase；
(2) correction process of measured value
To measuring amplitude and phase value A1、A1′、A2、A2′、A3、A′3、By formula (1), (2), (3)
Processing, obtains intermediate quantity w11、w12、w21、w22、w31、w32；
To w11、w12、w21、w22、w31、w32By formula (4), (5), (6) processing, intermediate quantity e is obtainedl1、el2、d1；
To el1、el2、d1It is handled by formula (7), (8), obtains intermediate quantity v1、v2；
To v1、v2It is handled by formula (9), (10), amplitude alpha, the phase beta of RF channel to be corrected is respectively obtained, such as formula (9), (10)
It is shown
。
2. the integrated correction system according to claim 1 suitable for different Active Arrays, it is characterised in that: institute
The each RF channel for stating industrial personal computer control Active Arrays completes phase shift, decaying and adds the process of the state configuration powered off such as
Under:
(1) each RF channel of Active Arrays is powered on；
(2) decay to the 1 phase shifter zero setting phase shift of Active Arrays RF channel, attenuator zero setting, other RF other than RF channel 1
Channel fader sets maximum attenuation, the phase of adjacency channel phase shifter sets 0 degree and 180 degree respectively；
(3) 120 degree of phase shifts are set to the phase shifter of Active Arrays RF channel 1, attenuator zero setting decays, the shape of other RF channels
State setting remains unchanged；
(4) 240 degree of phase shifts are set to the phase shifter of Active Arrays RF channel 1, attenuator zero setting decays, the shape of other RF channels
State setting remains unchanged；
(5) step (2), (3), (4) are repeated, phase shift, the decaying configuration of other RF channels are completed；
(6) each RF channel of Active Arrays is powered off.
3. the integrated correction system according to claim 1 suitable for different Active Arrays, it is characterised in that: institute
State industrial personal computer control high-acruracy survey real-time compensation unit, realize RF signal access and short-circuit condition, compensation RF cable shake,
Vector network analyzer amplitude and phase fluctuation, vector network analyzer temperature drift measurement error process:
Industrial personal computer control high-acruracy survey real-time compensation unit is placed in channel status, and vector network analyzer measures each RF channel
Amplitude and phase；Industrial personal computer control high-acruracy survey real-time compensation unit is placed in short-circuit condition, vector network analyzer measurement
The amplitude and phase of each RF channel；Above-mentioned measurement result twice is subtracted each other, that is, eliminates the shake of RF cable, vector network analysis
Instrument amplitude and phase fluctuation, vector network analyzer temperature drift measurement error.
4. the integrated correction system according to claim 1 suitable for different Active Arrays, it is characterised in that: institute
The far field that test probe is placed in Active Arrays is stated, far field distance meets d >=2D2/ λ, d are test probe and active array day
Distance between line, D are Active Arrays caliber size, and λ is the corresponding wavelength of working frequency of Active Arrays, pass through this
Mode is reduced to test environmental requirement, while realizing that correction and antenna radiation characteristics are test integrated, improves active array
Antenna development efficiency.
5. a kind of integrated bearing calibration suitable for different Active Arrays, it is characterised in that step includes active array day
The correction course of line emission state correction and Active Arrays reception state；The correction course of Active Arrays reception state
It is similar with the correction of Active Arrays emission state, it is its inverse process；Active Arrays emission state correction course is as follows:
(1) Active Arrays channel 1 measures
1. being powered on to each RF channel of Active Arrays；
2. 1 phase shifter zero setting phase shift of channel, attenuator zero attenuation, other channel faders set maximum attenuation, adjacency channel phase shift
Device phase sets 0 degree and 180 degree respectively；
3. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, set high-acruracy survey real-time compensation unit
Channel status；
4. industrial personal computer control vector network analyzer adds RF signal, vector network analyzer measures the amplitude and phase number of RF channel
According to passback industrial personal computer；
5. industrial personal computer controls high-acruracy survey real-time compensation unit by low-frequency cable, make high-acruracy survey real-time compensation cell-like
State sets short-circuit condition, and other parts states remain unchanged；
6. industrial personal computer control vector network analyzer adds RF signal, vector network analyzer measures the amplitude and phase number of RF channel
According to passback industrial personal computer；
7. 1 phase shifter of channel sets 120 degree of phase shifts, attenuator zero setting decaying, other channel faders set maximum attenuation, adjacency channel
Phase shifter phase sets 0 degree and 180 degree respectively；
8. repeating step 3., 4., 5., 6.；
9. 1 phase shifter of channel sets 240 degree of phase shifts, attenuator zero setting decaying, other channel faders set maximum attenuation, adjacency channel
Phase shifter phase sets 0 degree and 180 degree respectively；
10. repeating step 3., 4., 5., 6.；
(2) measurement in the other channels of Active Arrays
It repeats step (1), is gradually completing the measurement in the other each channels of Active Arrays；
(3) Active Arrays width phase trim
Industrial personal computer utilizes the amendment tri-state commutation correcting algorithm in industrial personal computer to each RF channel amplitude and phase data of passback
It is handled, calculates the amplitude and phase of each RF channel with level values, obtain each RF channel phase shifter of Active Arrays
With the control code of attenuator, each RF channel control code is sent by Active Arrays by industrial personal computer low-frequency cable, is realized each
The each RF channel correction of Active Arrays is completed in the refreshing of a RF channel phase shifter and attenuator.
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