CN105572487B - A kind of array antenna near field amplitude phase measuring method and width phase measuring appliance - Google Patents
A kind of array antenna near field amplitude phase measuring method and width phase measuring appliance Download PDFInfo
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- CN105572487B CN105572487B CN201511030715.2A CN201511030715A CN105572487B CN 105572487 B CN105572487 B CN 105572487B CN 201511030715 A CN201511030715 A CN 201511030715A CN 105572487 B CN105572487 B CN 105572487B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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Abstract
The invention belongs to antenna measurement technical fields, provide a kind of array antenna near field amplitude phase measuring method and width phase measuring appliance, comprising: the first hybrid test signal received to reference antenna samples, and obtains the first sampled signal；Probe is sampled in the received second hybrid test signal of current sample position, obtains the second sampled signal；According to the first sampled signal, the first width phase information of channel between each T/R component, each antenna element and the reference antenna of tested array antenna is calculated；According to the second sampled signal, the second width phase information of channel between each T/R component, each antenna element and the probe current sample position of tested array antenna is calculated；According to the first width phase information and the second width phase information, tested array antenna is calculated in the near field width phase information of current sample position.The calibration signal sent using spread-spectrum signal as array antenna improves the accuracy and efficiency of the width phase information measurement of tested array antenna by the processing to calibration signal.
Description
Technical field
The present invention relates to antenna measurement technical fields, and in particular to a kind of array antenna near field amplitude phase measuring method and width phase
Measuring appliance.
Background technique
Transmitting and receiving apparatus of the antenna as radio communication directly affects the quality of electric wave signal, thus, antenna exists
Occupy extremely important status in radio communication.And phased array antenna is because having fast beam scanning, being easy to beam shape victory
The advantages that change and spatial orientation ability are strong, has obtained increasingly extensive answer in fields such as communication, navigation, radar and electronic countermeasures
With.When antenna is matched with some application, need to carry out accurate antenna measurement, therefore, antenna measurement technology becomes
Instruct the important means of Antenna Design and compliance test antenna performance.According to the division of antenna place, antenna measurement technology is divided into
Far-field measurement technology and near-field measurement technique.
Occur earliest and the antenna measurement technology of mature is far-field measurement technology, needs purer spatial electromagnetic
The far-field measurement condition of environment and large test place as tested antenna, but with deep space exploration antenna and high-gain aerial
Development, earth surface electromagnetic environment is further severe, and antenna aperature is increasing, and the far-field measurement condition of tested antenna hardly results in
Meet.The basic skills of near-field measurement technique is using the known probe of an electrical characteristics in a certain of tested antenna near-field region
It is scanned in plane or curved surface according to spatial sampling theorem, collected amplitude and phase data is passed through into Near-far fields transfer meter
The far-field characteristic of tested antenna is calculated, the Aperture field distribution of tested antenna is further reconstructed by the inverting of mouth face.
Near-field measurement technique has clear advantage compared with far-field measurement technology: measurement round-the-clock can carry out, not by next
From the influence of outdoor environment；It is short to measure required distance, is suitable for wide aperture antenna；Indoor measurement can shield extraneous complicated electromagnetism
The interference of environment, and meet security requirements.Therefore, near field measurement, which has become, instructs phased array antenna to design and verify high increase
Benefit, the important means of ultra low sidelobe antenna performance.
As long as near-field measurement technique guarantees certain amplitude and phase measurement accuracy, far field spy can be accurately obtained
Property, therefore the key problem of near-field measurement technique is exactly measuring accuracy and testing efficiency.Conventional near-field measurement method generally makes
The method mutually measured with the point-by-point width of front, principle are when will pop one's head in the front for being moved to antenna element to be measured, and only opening should
Antenna element channels operation to be measured, remaining element channel do not work, and each channel is successively measured with vector network analyzer
Width is mutually worth.The shortcomings that front point-by-point amplitude phase measuring method is to need to close other channels other than channel to be measured, cannot be anti-
The actual conditions that all channels of array antenna work at the same time are reflected, cause measurement result accuracy not high.Measurement method also exists
All channels are in working condition when measurement, but needed within the one-shot measurement time one by one wave beam converted, when measurement
Between increase proportional to number of beams, cause measurement efficiency lower；Moreover, the active device in phased array antenna channel is measuring
It is inevitably influenced in the process by factors such as temperature drifts, generates time-varying error, cause measurement result accurately anti-
Reflect the performance of antenna.
Therefore, there is a problem of that testing efficiency is low in existing near-field measurement technique and test result inaccuracy.
Summary of the invention
In view of the defects existing in the prior art, the present invention proposes that a kind of array antenna near field amplitude phase measuring method and width are mutually surveyed
Measuring device, to solve the problems, such as that testing efficiency of the existing technology is low and test result is inaccurate.
For this purpose, in a first aspect, the present invention provides a kind of array antenna near field amplitude phase measuring method, the method packet
It includes:
The first hybrid test signal received to reference antenna samples, and obtains the first sampled signal；Described first is mixed
Conjunction test signal is to obtain after the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to the reference antenna
The the first hybrid test signal arrived；
Probe is sampled in the received second hybrid test signal of current sample position, obtains the second sampled signal；
The second hybrid test signal is that the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to the spy
The the second hybrid test signal obtained after head；
According to first sampled signal, each T/R component, each antenna element and the reference of tested array antenna are calculated
First width phase information of channel between antenna；According to second sampled signal, each T/R component of the tested array antenna of calculating,
Second width phase information of channel between each antenna element and the probe current sample position；
According to the first width phase information and the second width phase information, tested array antenna is calculated in current sample position
Near field width phase information.
Wherein, the spread spectrum test signal that each antenna element is sent be the different spread spectrum code sequence of use pass through base band at
The spread spectrum test signal obtained after shape and modulation.
Wherein, described according to first sampled signal, calculate each T/R component, each antenna element of tested array antenna
The first width phase information of channel between the reference antenna；According to second sampled signal, tested array antenna is calculated
Second width phase information of channel between each T/R component, each antenna element and the probe current sample position, comprising:
Based on first sampled signal, the first base band mixed signal is obtained；Based on second sampled signal, is obtained
Two base band mixed signals；
The first base band mixed signal is handled by multidiameter delay digital matched filter, obtains described first
Width phase information；The second base band mixed signal is handled by the multidiameter delay digital matched filter, obtains institute
State the second width phase information；Wherein, in the multidiameter delay digital matched filter each railway digital matched filter correspond to it is different
Spread spectrum code sequence.
Second aspect, the present invention provide a kind of width phase measuring appliance, and the width phase measuring appliance includes:
First sampled signal receiving module is obtained for sampling to the received first hybrid test signal of reference antenna
To the first sampled signal；The first hybrid test signal is the spread spectrum test letter that each antenna element of tested array antenna is sent
Number it is transferred to the first hybrid test signal obtained after the reference antenna；
Second sampled signal receiving module, for probe the received second hybrid test signal of current sample position into
Row sampling, obtains the second sampled signal；The second hybrid test signal is that each antenna element of tested array antenna is sent
Spread spectrum test signal is transferred to the second hybrid test signal obtained after the probe；
Width phase information computational module, for calculating each T/R group of tested array antenna according to first sampled signal
First width phase information of channel between part, each antenna element and the reference antenna；According to second sampled signal, quilt is calculated
Survey the second width phase information of channel between each T/R component, each antenna element and the probe current sample position of array antenna；
Near field width phase information computational module, for calculating according to the first width phase information and the second width phase information
Near field width phase information of the tested array antenna in current sample position.
Wherein, the spread spectrum test signal that each antenna element is sent be the different spread spectrum code sequence of use pass through base band at
The spread spectrum test signal obtained after shape and modulation.
Wherein, the width phase information computational module, specifically includes:
Base band mixed signal computing unit obtains the first base band mixed signal for being based on first sampled signal；Base
In second sampled signal, the second base band mixed signal is obtained；
Width phase information calculating unit, for passing through multidiameter delay digital matched filter to the first base band mixed signal
It is handled, obtains the first width phase information；It is mixed to second base band by the multidiameter delay digital matched filter
It closes signal to be handled, obtains the second width phase information；Wherein, each railway digital in the multidiameter delay digital matched filter
Matched filter corresponds to different spread spectrum code sequences.
The third aspect, the present invention provide a kind of array antenna near-field measurement method, which comprises
Probe control instruction is sent to locator, so that the locator controls probe root according to the probe control instruction
It is moved according to pre-set velocity；
It is moved in the probe any pre- according to the pre-set velocity based on the location information of each default sampling location
If when sampling location, the sampling instruction issued to above-mentioned width phase measuring appliance, so that the width phase measuring appliance connects reference antenna
The the first hybrid test signal received is sampled, and is adopted to probe in the received second hybrid test signal of current sample position
Sample；
Based on preset duration, read instruction is sent to above-mentioned width phase measuring appliance device, is being worked as with obtaining tested array antenna
The near field width phase information of preceding sampling location；
According to the near field width phase information of each default sampling location received, it is based on Near-far fields transfer method, reconstructs quilt
Survey the Aperture field distribution of array antenna.
Fourth aspect, the present invention provide a kind of major control data processor, and the major control data processor includes:
First sending module, for sending probe control instruction to locator, so that the locator is according to the probe
Control instruction control probe is moved according to pre-set velocity；
Second sending module is used for according to the pre-set velocity, based on the location information of each default sampling location, described
When probe is moved to any default sampling location, the sampling instruction issued to above-mentioned width phase measuring appliance, so that the width is mutually surveyed
Measuring device the first hybrid test signal received to reference antenna samples, mixed in current sample position received second to probe
Test signal is closed to be sampled；
Third sending module sends read instruction to above-mentioned width phase measuring appliance device for being based on preset duration, to obtain
Near field width phase information of the tested array antenna in current sample position；
Data processing module, for the near field width phase information according to each default sampling location received, based on close
Far-Zone Field Transformation method reconstructs the Aperture field distribution of tested array antenna.
5th aspect, the present invention provide a kind of array antenna near field measurement device, and described device includes:
Above-mentioned width phase measuring appliance, above-mentioned master control/data processor, probe, reference antenna, locator, scanning support with
And tested array antenna system；
Master control/the data processor is connect with the locator, the width phase measuring appliance；
The width phase measuring appliance is connect with the probe, the reference antenna；
The locator and the probe connect, and the locator and the probe are installed on the scanning support；
The scanning support is placed on the front in the tested array antenna mouth face in the tested array antenna system；
The reference antenna is placed on immediately ahead of the tested array antenna mouth face except region.
Wherein, the tested array antenna system includes: test signal generator, multiple T/R components and tested array
Antenna；
The tested array antenna is connect by the multiple T/R component with the test signal generator；It is the multiple
The quantity of T/R component is identical as the antenna amount in the tested array antenna.
A kind of array antenna near field amplitude phase measuring method and processor provided by the invention, by tested array antenna
The spread spectrum test signal that each antenna element is sent is handled, and is obtained spreading gain, is improved the width phase to tested array antenna
The accuracy of information measurement, and the amplitude and phase data of the radiation of all antennas in tested array antenna can be measured simultaneously,
Improve the efficiency of tested array antenna amplitude-phase information measurement.A kind of array antenna near-field measurement method provided by the invention and control
System/data processor is tested the width phase information of array antenna by the multiple groups obtained to above-mentioned width phase measuring appliance, carries out nearly far field
Transformation reconstructs the Aperture field distribution of tested array antenna, improves the accuracy and efficiency of array antenna near field measurement.The present invention
A kind of array antenna near field measurement device provided, by using above-mentioned width phase measuring appliance and control/data processor, to tested
Array antenna carries out near field measurement, improves the accuracy and efficiency of array antenna near field measurement.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present disclosure or technical solution in the prior art, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Disclosed some embodiments for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is a kind of flow chart for array antenna near field amplitude phase measuring method that one embodiment of the invention provides；
Fig. 2 is a kind of structural schematic diagram for width phase measuring appliance that one embodiment of the invention provides；
Fig. 3 is a kind of flow chart for array antenna near-field measurement method that one embodiment of the invention provides；
Fig. 4 is a kind of structural schematic diagram for master control/data processor that one embodiment of the invention provides；
Fig. 5 is a kind of structural schematic diagram for array antenna near field measurement device that one embodiment of the invention provides；
Fig. 6 is the array antenna near field measurement instruction sequencing figure that one embodiment of the invention provides；
Fig. 7 is the Amplitude-phase relation schematic diagram for the array antenna that one embodiment of the invention provides.
Description of symbols
In figure, 51: width phase measuring appliance 52: master control/data processor 53: probe 54: reference antenna 55: locator
56: scanning support 57: tested array antenna system 57-1: test signal generator 57-2:T/R component 57-3: tested array
Antenna.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present disclosure, the technical solution in the embodiment of the present disclosure is carried out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the disclosure, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of disclosure protection.
As shown in Figure 1, one embodiment of the disclosure provides a kind of array antenna near field amplitude phase measuring method, this method includes
Following steps S1 to S4:
S1, the first hybrid test signal received to reference antenna sample, and obtain the first sampled signal；Described first
Hybrid test signal is after the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to the reference antenna
The first obtained hybrid test signal；
It should be noted that the spread spectrum test signal that sends of each antenna element of tested array antenna through each antenna element with
For transmission between reference antenna to reference antenna, the first hybrid test signal that reference antenna receives is spread spectrum test signal
The sum of obtained signal and noise signal after channel transmission.
Specifically, by reference to the received first hybrid test signal of antenna are as follows:
Wherein,Indicate that the multiple width of transmission channel of k-th of the antenna element of tested array antenna to reference antenna is mutually special
Property, StkIt (t) is the spread spectrum test signal for being tested k-th of antenna element of array antenna and emitting, n (t) indicates transmission mistake
Noise in journey, 1≤k≤K, K are the total quantity of antenna element in tested array antenna.
It should be noted that the spread spectrum test signal of tested array antenna is during transmission, it is dry that there are noise signals
Disturb, it is the accuracy in order to improve calculated result that the present embodiment, which takes into account noise signal, but those skilled in the art in order to
Simplicity is calculated, the interference of noise signal can also be ignored.
S2, probe is sampled in the received second hybrid test signal of current sample position, obtains the second sampling letter
Number；The second hybrid test signal is described in the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to
The the second hybrid test signal obtained after probe；
It should be noted that the spread spectrum test signal that sends of each antenna element of tested array antenna through each antenna element with
To probe, the second hybrid test signal received of popping one's head in passes through transmission between probe current location for spread spectrum test signal
The sum of the signal obtained after transmission and noise signal.
Specifically, pass through received second hybrid test signal of popping one's head in are as follows:
Wherein,Indicate k-th of antenna element of tested array antenna to the transmission channel between the m of probe sampling position
Multiple magnitude-phase characteristics, StkIt (t) is the spread spectrum test signal for being tested k-th of antenna element of array antenna and emitting, n (t) indicates letter
Noise in road transmission process, 1≤k≤K, K are the total quantity of antenna element in tested array antenna.
It should be noted that the present embodiment does not limit the quantity of sampling location, those skilled in the art can be according to practical feelings
The quantity of condition setting sampling location.
S3, according to first sampled signal, calculate each T/R component of tested array antenna, each antenna element with it is described
First width phase information of channel between reference antenna；According to second sampled signal, each T/R group of tested array antenna is calculated
Second width phase information of channel between part, each antenna element and the probe current sample position；
It should be noted that each antenna element in tested array antenna is connect with each T/R component, a T/R component and
One antenna element connection, forms channel between a T/R component and an antenna element.
Specifically, between the T/R component and the reference antenna being connect with k-th of antenna element in tested array antenna
First width phase information of channel are as follows:
Wherein,For the width phase information of k-th of antenna element to reference antenna,For k-th of element antenna and reference
The multiple magnitude-phase characteristics of transmission channel between antenna,It is logical between k-th of antenna element T/R component connected to it
Road magnitude-phase characteristics.
Specifically, between the T/R component and the reference antenna being connect with k-th of antenna element in tested array antenna
First width phase information of channel are as follows:
Wherein,For k-th of antenna element to the width phase information of m-th of sampling location,For k-th antenna element with
The multiple magnitude-phase characteristics of transmission channel between m-th of sampling location,For k-th of antenna element T/R component connected to it
Between channel magnitude-phase characteristics.
S4, according to the first width phase information and the second width phase information, calculate tested array antenna in present sample
The near field width phase information of position.
Specifically, the calculation formula of near field width phase information are as follows:
Wherein,Near field width phase information for k-th of antenna element m-th of sampling location,For k-th of antenna list
Member is width phase information of k-th of antenna element to reference antenna to the width phase information of m-th of sampling location.
A kind of array antenna near field amplitude phase measuring method provided in this embodiment, by each antenna in tested array antenna
The spread spectrum test signal that unit is sent is handled, and spreading gain is obtained, and improves the width phase information survey to tested array antenna
The accuracy of amount, and the amplitude and phase data of the radiation of all antennas in tested array antenna can be measured simultaneously, it improves
The efficiency of tested array antenna amplitude-phase information measurement.
The spread spectrum test signal that each antenna element in the step S1 and step S2 of the present embodiment is sent is to each antenna
The Baseband Testing signal that unit is sent is the spread spectrum test letter obtained using different spread spectrum code sequences by Direct Sequence Spread Spectrum
Number.
Specifically, base band shaping is passed through using different spread spectrum code sequences to the Baseband Testing signal that each antenna element is sent
Signal is tested with the spread spectrum obtained after modulation.
It should be noted that being carried out at spread spectrum using based on test signal of the Direct Sequence Spread Spectrum mode to each antenna element
Reason obtains the spread spectrum test signal of each antenna element, tests signal by the spread spectrum to each antenna element and carry out despreading processing,
Spreading gain is obtained by spread-spectrum, there is the advantages of measuring accuracy is high, strong antijamming capability.
The step S3 of the present embodiment: " according to first sampled signal, each T/R component, each of tested array antenna is calculated
First width phase information of channel between antenna element and the reference antenna；According to second sampled signal, tested battle array is calculated
Second width phase information of channel between each T/R component of array antenna, each antenna element and the probe current sample position ", tool
Body includes following subdivided step S31 to S32 not shown in the figure:
S31, it is based on first sampled signal, obtains the first base band mixed signal；Based on second sampled signal, obtain
To the second base band mixed signal；
Specifically, down coversion, low-pass filtering treatment are successively carried out to the first sampled signal, the second sampled signal respectively, obtained
To the first base band hybrid test signal, the second base band hybrid test signal.
S32, the first base band mixed signal is handled by multidiameter delay digital matched filter, is obtained described
First width phase information；The second base band mixed signal is handled by the multidiameter delay digital matched filter, is obtained
To the second width phase information；Wherein, each railway digital matched filter is corresponding not in the multidiameter delay digital matched filter
Same spread spectrum code sequence.
Specifically, the quantity phase of the number of multidiameter delay digital matched filter and the antenna element in tested array antenna
Together.
Specifically, every railway digital matched filter corresponds to unique spread spectrum code sequence.
As shown in Fig. 2, another open embodiment of the present invention discloses a kind of width phase measuring appliance, comprising: the first sampled signal
Receiving module 21, the second sampled signal receiving module 22, width phase information computational module 23 and near field width phase information computational module
24；
First sampled signal receiving module 21, for being sampled to the received first hybrid test signal of reference antenna,
Obtain the first sampled signal；The first hybrid test signal is the spread spectrum test that each antenna element of tested array antenna is sent
Signal is transferred to the first hybrid test signal obtained after the reference antenna；
Second sampled signal receiving module 22 is used for probe in the received second hybrid test signal of current sample position
It is sampled, obtains the second sampled signal；The second hybrid test signal is that each antenna element of tested array antenna is sent
Spread spectrum test signal be transferred to the second hybrid test signal obtained after the probe；
Width phase information computational module 23, for calculating each T/R group of tested array antenna according to first sampled signal
First width phase information of channel between part, each antenna element and the reference antenna；According to second sampled signal, quilt is calculated
Survey the second width phase information of channel between each T/R component, each antenna element and the probe current sample position of array antenna；
Near field width phase information computational module 24, for according to the first width phase information and the second width phase information, meter
Tested array antenna is calculated in the near field width phase information of current sample position.
A kind of width phase measuring appliance provided in this embodiment, passes through the expansion of each antenna element to received tested array antenna
Frequency test signal is handled, while measuring the width phase information of each antenna element, and the width phase information for improving array antenna is surveyed
The accuracy and efficiency of amount.
In the present embodiment, the spread spectrum test signal that each antenna element is sent is to be passed through using different spread spectrum code sequences
Cross the spread spectrum test signal obtained after base band shaping and modulation.
In the present embodiment, width phase information computational module 23 specifically includes not shown in the figure: base band mixed signal calculates
Unit 231 and width phase information calculating unit 232；
Base band mixed signal computing unit 231 obtains the first base band mixing letter for being based on first sampled signal
Number；Based on second sampled signal, the second base band mixed signal is obtained；
Width phase information calculating unit 232, for being mixed by multidiameter delay digital matched filter to first base band
Signal is handled, and the first width phase information is obtained；By the multidiameter delay digital matched filter to second base
Band mixed signal is handled, and the second width phase information is obtained；Wherein, the road multidiameter delay digital matched filter Zhong Ge
Digital matched filter corresponds to different spread spectrum code sequences.
As shown in figure 3, another open embodiment of the present invention discloses a kind of array antenna near-field measurement method, this method packet
Include following steps A1 to A4:
A1, probe control instruction is sent to locator, visit so that the locator is controlled according to the probe control instruction
Head is moved according to pre-set velocity；
Optionally, locator is at the uniform velocity moved according to the probe control instruction control probe received by preset direction
It is dynamic.
Optionally, each default sampling location is in evenly spaced discrete distribution.
It should be noted that the selection of multiple sampling locations needs to meet spatial sampling theorem, two neighboring sampling location
The distance between should be less than half of test signal wavelength.
A2, it is moved in the probe any according to the pre-set velocity based on the location information of each default sampling location
When default sampling location, the sampling instruction issued to above-mentioned width phase measuring appliance, so that the width phase measuring appliance is to reference antenna
Received first hybrid test signal is sampled, and is carried out to probe in the received second hybrid test signal of current sample position
Sampling；
It should be noted that probe is ceaselessly carrying out uniform motion, according to the speed of probe movement and pre-stored
The location information of each default sampling location can calculate the time that probe reaches each default sampling location.Master control/data processor root
Sampling instruction is sent to width phase measuring appliance according to the time that preset probe reaches each default sampling location, so that width mutually measures
Device carries out sampling processing in each default sampling location.
A3, it is based on preset duration, sends read instruction to above-mentioned width phase measuring appliance, worked as with obtaining tested array antenna
The near field width phase information of preceding sampling location；
Optionally, in each sampling location, width phase measuring appliance is to the first sampled signal by probe and reference antenna sampling
It is identical with the time that the second sampled signal is handled.
It should be noted that width phase measuring appliance is to the first sampled signal and the second sampling by probe and reference antenna sampling
The time that signal is handled can also be different, in order to calculate simplicity in the present embodiment, at each data of width phase measuring appliance
It is identical to manage time setting.
Optionally, the near field width phase information of current sample position is stored.
It should be noted that being based on preset duration, read instruction is sent to width phase measuring appliance；Width phase measuring appliance is according to sampling
It instructs the first hybrid test signal received to reference antenna to be sampled, is mixed in current sample position received second to probe
It closes test signal to be sampled, and the signal for obtaining sampling calculates, and obtains the tested array antenna of current sample position
Near field width phase information.
It should be noted that preset duration in the present embodiment be greater than width phase measuring appliance to sampling to signal at
The duration of reason.
A4, it is reconstructed according to the near field width phase information of each default sampling location received based on Near-far fields transfer method
The Aperture field distribution of tested array antenna.
It should be noted that according to the near field width phase information of each default sampling location of the tested array antenna of storage, base
The far-field distribution of tested array antenna is obtained in Near-far fields transfer method, further, reconstructs the aperture field point of tested array antenna
Cloth.
A kind of array antenna near-field measurement method provided in this embodiment, by width disclosed in above-mentioned one open embodiment
The multiple groups that phase measuring appliance obtains are tested the width phase information of array antenna, carry out Near-far fields transfer, reconstruct the mouth of tested array antenna
Diameter field distribution improves the accuracy and efficiency of array antenna near field measurement.
It should be noted that the quantity of default sampling location is that reconstruct is needed to be tested the Aperture field distribution of array antenna most
The quantity of few sampling location.
As shown in figure 4, another open embodiment of the present invention provides a kind of master control/data processor, comprising: first sends
Module 41, the first receiving module 42, the second sending module 43, judgment module 44 and data processing module 45；
First sending module 41, for sending probe control instruction to locator, so that the locator is according to the spy
Head control instruction control probe is moved according to pre-set velocity；
Specifically, locator is according to probe control instruction control promoter probe, movement and stopping.
Second sending module 42 is used for according to the pre-set velocity, based on the location information of each default sampling location, in institute
When stating probe and being moved to any default sampling location, the sampling instruction issued to above-mentioned width phase measuring appliance, so that the width phase
Measuring appliance the first hybrid test signal received to reference antenna samples, to probe in current sample position received second
Hybrid test signal is sampled；
Third sending module 43 sends read instruction to above-mentioned width phase measuring appliance for being based on preset duration, to obtain
Near field width phase information of the tested array antenna in current sample position；
Data processing module 45 is based on for the near field width phase information according to each default sampling location received
Near-far fields transfer method reconstructs the Aperture field distribution of tested array antenna.
A kind of master control/data processor provided in this embodiment, by mutually being surveyed to width disclosed in above-mentioned one open embodiment
The tested array antenna that measuring device obtains carries out Near-far fields transfer in the width phase information of each default sampling location, reconstructs tested array
The Aperture field distribution of antenna improves the accuracy and efficiency of array antenna near field measurement.
As shown in figure 5, another open embodiment of the present invention provides a kind of array antenna near field measurement device, comprising:
Master control/data processor 52 disclosed in width phase measuring appliance 51, an above-mentioned embodiment disclosed in an above-mentioned embodiment is visited
First 53, reference antenna 54, locator 55, scanning support 56 and tested array antenna system 57；
Master control/data processor 52 is connect with locator 55, width phase measuring appliance 51；
Width phase measuring appliance 51 is connect with probe 53, reference antenna 54；
Locator 55 is connect with probe 53, and locator 55 and probe 53 are installed on scanning support 56；
Scanning support 56 is placed on the front in the tested array antenna mouth face in tested array antenna system 57；
Reference antenna 54 is placed on immediately ahead of the tested array antenna mouth face except region.
In the present embodiment, tested array antenna system 57 includes: test signal generator 57-1, multiple T/R component 57-2
And tested array antenna 57-3；
Tested array antenna 57-3 is connect by multiple T/R component 57-2 with test signal generator 57-1；Multiple T/R groups
The quantity of part 57-2 is identical as the antenna amount in tested array antenna 57-3.
Specifically, the course of work of a kind of array antenna near field measurement device provided in this embodiment are as follows:
It is transmitting antenna, reference antenna 54 and the probe 53 being mounted on scanning support 56 that tested array antenna 57-3, which is arranged,
For receiving antenna；
Master control/data processor 52 sends probe control instruction to the locator 55 being mounted on scanning support 56, so that fixed
53 starting of the position control of device 55 probe is at the uniform velocity moved and is stopped by preset direction, and each default sampling location is passed sequentially through；
And when probe reaches any default sampling location, sampling instruction is sent to width phase measuring appliance；
Width phase measuring appliance 51 samples instruction based on the received, and the first hybrid test signal for connecing 54 receipts to reference antenna carries out
Acquisition, obtains the first sampled signal；Probe 53 is sampled in the received second hybrid test signal of current sample position, is obtained
To the second sampled signal；And the signal of sampling arrived through and being less than or equal to time TpProcessing, obtain current sample position
Near field width phase information；
Master control/data processor 52 is according to preset duration Tp, read instruction is sent to width phase measuring appliance 51；
Width phase measuring appliance 51 sends current sample position to master control/data processor 52 according to the read instruction received
Near field width phase information；
Master control/data processor 52 saves the near field width phase information of the current sample position received；And according to preservation
The near field width phase information of each default sampling location obtains the near field distribution of tested array antenna 57-3 by Near-far fields transfer method,
Further, the field distribution of the bore of tested array antenna 57-3 is reconstructed.
It should be noted that if the near field width that master control/data processor is not saved in each default sampling location is believed
Breath then continues to send sampling instruction to width phase measuring appliance according to preset duration, until receiving the near field of a default sampling location
Width phase information.
Array antenna near field measurement instruction sequencing figure is as shown in Figure 6:
There are two wide positive pulses for control instruction of popping one's head in.Wide positive pulse indicating locator positioned at 0 moment starts to be moved,
Another wide positive pulse indicating locator terminates to move.Between the two pulses, probe remains a constant speed movement.
Master control/data processor can send sampling instruction to width phase measuring appliance simultaneously.Sampling instruction is previously according to probe
What the direction of motion, the speed of uniform motion and sampling location were set.Each sampling location has a corresponding narrow positive pulse, width
Phase measuring appliance receives the signal received immediately to reference antenna and probe after the narrow positive pulse that sampling instructs and is sampled simultaneously
Processing, obtains the near field width phase information at the sampling location.Time interval between two sampling locations is T.
Master control/data processor also can send read instruction to width phase measuring appliance.The read instruction is based on preset duration,
After the narrow positive pulse of each of sampling instruction is transmitted to width phase measuring appliance, by time TpA corresponding reading is sent to width phase measuring appliance
The narrow positive pulse of number instruction.After width phase measuring appliance receives the narrow positive pulse of corresponding read instruction, passed to master control/data processor
Send the near field width phase information at the beginning of corresponding sampling location.It should be noted TpGreater than the time of signal sampling and processing.
After master control/data processor receives the near field width phase information at corresponding sampling location, by TiTime continues
Send the narrow positive pulse signal of next sampling instruction.
Fig. 7 shows the Amplitude-phase relation of array antenna, wherein each T/R component and each antenna element in tested array antenna
Between the magnitude-phase characteristics in channel that is formed beK is the number of each antenna element in tested array antenna
Amount, the quantity of T/R component is identical as the quantity of each antenna element in tested array antenna, then is tested each day in array antenna
The number of channels formed between line unit and T/R component is also K.Each antenna element and probe sampling position in tested array antenna
Between transmission channel magnitude-phase characteristics are as follows:Wherein, k=1,2 ..., K, 1≤m≤M, M are sampling location sum.Tested battle array
The test signal that array antenna the is sent Baseband Testing signal that signal generator generates after tested are as follows:
Wherein, k=1,2 ..., K, Baseband Testing signal herein are the signal obtained after spread processing, ck(n)=[ck(1),ck
(2) ..., ck(n) ..., ck(N)] be the corresponding spread spectrum code sequence in each channel, N be spread spectrum code sequence length, h (t) be [0,
Tc) normalization pulse in section, the i.e. unit impulse response of base band formed filter, TcIndicate the duration of chip.
The Baseband Testing signal that each antenna element is sent in tested array antenna is modulated to obtain spread spectrum test signal are as follows:Wherein, fcIndicate carrier frequency.
It should be noted that selection rectangular coordinate system in space, tested antenna is located in Z=0 plane, pops one's head in the plane of scanning motion
It is moved on Z=d, d is 3~5 λ, and wherein λ is signal wavelength.Theoretically scanning surface answers infinity, but in actual measurement, and probe is only
It is moved in limited plane domain, usually the level at selection severance of scanning plane is 30~40dB lower than center place can meet far
Field pattern required precision.Probe remains a constant speed movement in entire measurement, chooses uniform intervals on the track of probe movement
M discrete position sampled, the selection of sampled point needs to meet spatial sampling theorem, between two neighboring sampled point
Distance should be less than half of test signal wavelength, i.e. λ/2 Δ x <, and λ/2 Δ y <, for ultra low sidelobe antenna, the sampling interval is smaller.
A kind of array antenna near field measurement device provided in this embodiment, by each antenna element in tested array antenna
The spread spectrum test signal of transmission is handled, and is obtained spreading gain, is improved the width phase information measurement to tested array antenna
Accuracy, and the amplitude and phase data of the radiation of all antennas in tested array antenna can be measured simultaneously, it improves tested
The efficiency of array antenna amplitude-phase information measurement.
It should be noted that herein " first ", " second " and " third " be used merely to the identical entity of differentiation title or
Operation does not imply that sequence or relationship between these entities or operation.
Those of ordinary skill in the art will appreciate that: the above embodiments are only used to illustrate the technical solution of the present invention., and
It is non-that it is limited；Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art
It is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, either to part of or
All technical features are equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution this hair
Bright claim limited range.
Claims (10)
1. a kind of array antenna near field amplitude phase measuring method, which is characterized in that the described method includes:
The first hybrid test signal received to reference antenna samples, and obtains the first sampled signal；First mixing is surveyed
Trial signal is to obtain after the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to the reference antenna
First hybrid test signal；
Probe is sampled in the received second hybrid test signal of current sample position, obtains the second sampled signal；It is described
Second hybrid test signal is after the spread spectrum test signal that each antenna element of tested array antenna is sent is transferred to the probe
The second obtained hybrid test signal；
According to first sampled signal, each T/R component, each antenna element and the reference antenna of tested array antenna are calculated
Between channel the first width phase information；According to second sampled signal, each T/R component, each day of tested array antenna are calculated
Second width phase information of channel between line unit and the probe current sample position；
According to the first width phase information and the second width phase information, tested array antenna is calculated in the close of current sample position
Field width phase information.
2. the method according to claim 1, wherein the spread spectrum test signal that each antenna element is sent is to adopt
Signal is tested with the spread spectrum that different spread spectrum code sequences obtains after base band shaping and modulation.
3. according to the method described in claim 2, it is characterized in that, described according to first sampled signal, the tested battle array of calculating
First width phase information of channel between each T/R component of array antenna, each antenna element and the reference antenna；According to described second
Sampled signal calculates channel between each T/R component, each antenna element and the probe current sample position of tested array antenna
The second width phase information, comprising:
Based on first sampled signal, the first base band mixed signal is obtained；Based on second sampled signal, the second base is obtained
Band mixed signal；
The first base band mixed signal is handled by multidiameter delay digital matched filter, obtains the first width phase
Information；The second base band mixed signal is handled by the multidiameter delay digital matched filter, obtains described
Two width phase information；Wherein, each railway digital matched filter corresponds to different spread spectrums in the multidiameter delay digital matched filter
Code sequence.
4. a kind of width phase measuring appliance, which is characterized in that the width phase measuring appliance includes:
First sampled signal receiving module obtains for sampling to the received first hybrid test signal of reference antenna
One sampled signal；The first hybrid test signal is that the spread spectrum test signal that each antenna element of tested array antenna is sent passes
It is defeated to the first hybrid test signal obtained after the reference antenna；
Second sampled signal receiving module, for being adopted to probe in the received second hybrid test signal of current sample position
Sample obtains the second sampled signal；The second hybrid test signal is the spread spectrum that each antenna element of tested array antenna is sent
Test signal is transferred to the second hybrid test signal obtained after the probe；
Width phase information computational module, for according to first sampled signal, calculating each T/R component, each of tested array antenna
First width phase information of channel between antenna element and the reference antenna；According to second sampled signal, tested battle array is calculated
Second width phase information of channel between each T/R component of array antenna, each antenna element and the probe current sample position；
Near field width phase information computational module, for calculating tested according to the first width phase information and the second width phase information
Near field width phase information of the array antenna in current sample position.
5. width phase measuring appliance according to claim 4, which is characterized in that the spread spectrum that each antenna element is sent tests letter
Number for using different spread spectrum code sequences, obtained spread spectrum tests signal after base band shaping and modulation.
6. width phase measuring appliance according to claim 4, which is characterized in that the width phase information computational module specifically includes:
Base band mixed signal computing unit obtains the first base band mixed signal for being based on first sampled signal；Based on institute
The second sampled signal is stated, the second base band mixed signal is obtained；
Width phase information calculating unit, for being carried out by multidiameter delay digital matched filter to the first base band mixed signal
Processing, obtains the first width phase information；Second base band is mixed by the multidiameter delay digital matched filter and is believed
It number is handled, obtains the second width phase information；Wherein, each railway digital matching in the multidiameter delay digital matched filter
Filter corresponds to different spread spectrum code sequences.
7. a kind of array antenna near-field measurement method, which is characterized in that the described method includes:
Probe control instruction is sent to locator, so that the locator controls probe according to pre- according to the probe control instruction
If speed is moved；
Any preset is moved in the probe and is adopted based on the location information of each default sampling location according to the pre-set velocity
When sample position, sampling instruction is issued to width phase measuring appliance as claimed in claim 4, so that the width phase measuring appliance is to reference antenna
Received first hybrid test signal is sampled, and is carried out to probe in the received second hybrid test signal of current sample position
Sampling；
Based on preset duration, read instruction is sent to width phase measuring appliance as claimed in claim 4, is existed with obtaining tested array antenna
The near field width phase information of current sample position；
According to the near field width phase information of each default sampling location received, it is based on Near-far fields transfer method, reconstructs tested battle array
The Aperture field distribution of array antenna.
8. a kind of master control/data processor, which is characterized in that the master control/data processor includes:
First sending module, for sending probe control instruction to locator, so that the locator is controlled according to the probe
Instruction control probe is moved according to pre-set velocity；
Second sending module is used for according to the pre-set velocity, based on the location information of each default sampling location, in the probe
When being moved to any default sampling location, sampling instruction is issued to width phase measuring appliance as claimed in claim 4, so that the width phase
Measuring appliance the first hybrid test signal received to reference antenna samples, to probe in current sample position received second
Hybrid test signal is sampled；
Third sending module sends read instruction to width phase measuring appliance as claimed in claim 4 for being based on preset duration, with
Tested array antenna is obtained in the near field width phase information of current sample position；
Data processing module is based on nearly far field for the near field width phase information according to each default sampling location received
Converter technique reconstructs the Aperture field distribution of tested array antenna.
9. a kind of array antenna near field measurement device, which is characterized in that described device includes:
Such as the described in any item width phase measuring appliances of claim 4-6, master control/data processor as claimed in claim 8, spy
Head, reference antenna, locator, scanning support and tested array antenna system；
Master control/the data processor is connect with the locator, the width phase measuring appliance；
The width phase measuring appliance is connect with the probe, the reference antenna；
The locator and the probe connect, and the locator and the probe are installed on the scanning support；
The scanning support is placed on the front in the tested array antenna mouth face in the tested array antenna system；
The reference antenna is placed on immediately ahead of the tested array antenna mouth face except region.
10. device according to claim 9, which is characterized in that the tested array antenna system includes: that test signal produces
Raw device, multiple T/R components and tested array antenna；
The tested array antenna is connect by the multiple T/R component with the test signal generator；The multiple T/R group
The quantity of part is identical as the antenna amount in the tested array antenna.
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| CN106443209B (en) * | 2016-12-03 | 2023-09-29 | 刘科宏 | System and method for testing three-dimensional space far-field radiation characteristics of active base station antenna |
| CN106970271B (en) * | 2017-04-27 | 2024-01-12 | 旷良彬 | Digital antenna test system and test method |
| CN107192893A (en) * | 2017-06-26 | 2017-09-22 | 泰姆瑞技术（深圳）有限公司 | A kind of method of antenna measurement system and antenna measurement system stability of eliminating the effects of the act |
| CN107462779B (en) * | 2017-06-30 | 2020-01-24 | 上海卫星工程研究所 | Testing method of device for measuring phase error of cable between microwave imaging satellite boards |
| CN108037374B (en) * | 2017-10-12 | 2020-03-31 | 西安天和防务技术股份有限公司 | Array antenna near field calibration method |
| WO2020125958A1 (en) * | 2018-12-18 | 2020-06-25 | Telefonaktiebolaget Lm Ericsson (Publ) | System and method for alignment measurement of an array antenna system |
| CN110398638B (en) * | 2019-07-26 | 2021-09-24 | 成都天锐星通科技有限公司 | Phased array antenna test method and phased array antenna test system |
| CN111726177B (en) * | 2019-11-01 | 2022-09-13 | 深圳市通用测试系统有限公司 | Wireless performance test method, device, system, equipment and storage medium of wireless equipment |
| CN112327061A (en) * | 2020-09-23 | 2021-02-05 | 北京无线电计量测试研究所 | Horn antenna directional pattern calibration system and method |
| CN116008679B (en) * | 2023-03-23 | 2023-06-06 | 中山香山微波科技有限公司 | Near-field amplitude-phase data extraction circuit and near-field amplitude-phase data extraction method |
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