CN116643095A - Phased array antenna pattern testing system and method - Google Patents
Phased array antenna pattern testing system and method Download PDFInfo
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Abstract
The application discloses a phased array antenna pattern testing system and a method, wherein the system comprises a radio frequency subsystem, a synchronous control subsystem and a data processing subsystem, a beam control code to be tested is stored in an instruction storage repeater before testing, the synchronous control subsystem sends the beam control code to the radio frequency subsystem according to an angle synchronous pulse signal during testing, so that the radio frequency subsystem generates radio frequency signals of corresponding beams, then the synchronous control subsystem sends sampling trigger pulse signals to the radio frequency subsystem, the radio frequency signals are sampled to obtain radio frequency signal amplitude and phase, the radio frequency signal amplitude and phase are sent to the data processing subsystem, and finally the data processing subsystem generates corresponding angle domain patterns to finish pattern testing of all sections to be tested. The corresponding radio frequency signals are generated by utilizing the angle synchronous pulse signals, and the scanning acquisition of the radio frequency signals is completed, so that the phased array antenna pattern sweep frequency and the code scanning test can be completed efficiently and accurately.
Description
Technical Field
The application relates to the field of phased array antenna testing, in particular to a phased array antenna pattern testing system and method.
Background
The pattern test of the phased array antenna is usually to test its two-dimensional pattern with a far field test system or its three-dimensional pattern with a near field test system. The far field test of the phased array antenna pattern is usually to test the patterns of each wave beam one by one under each working frequency point in a point frequency time domain mode, although the time for testing the patterns by using the far field is much faster than that of the near field, the phased array antenna needs to test the patterns of each wave beam under a plurality of working frequency points due to the working system, the number of the patterns is large, the turntable needs to rotate many times, and because the phased array antenna is large and heavy relative to the passive antenna, a plurality of cables are connected, the rotating speed of the turntable is slow, the total test time is long, and the test workload is huge.
When the planar near field test phased array antenna pattern is adopted, after planar near field scanning sampling is completed, the three-dimensional pattern of the tested phased array antenna is obtained through calculation of near field to far field conversion, the pattern is visual and comprehensive in information, but the test speed is slower than that of far field test, the maximum far field angle is only 70 degrees, and when the scanning angle is large, the error is large due to the influence of the cut-off effect of the near field test port surface, so that the accuracy is relatively poor when the pattern of a large scanning angle wave beam is tested by the planar near field.
Thus, testing phased array antenna patterns, whether with far field or near field, takes a long time. In order to accurately and quickly test the pattern of a phased array antenna, improvements and improvements are needed in conventional antenna pattern testing methods.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and provides a phased array antenna pattern test system and a phased array antenna pattern test method, which are used for generating corresponding radio frequency signals through angle synchronous pulse signals and completing scanning acquisition of the radio frequency signals, so that the phased array antenna pattern sweep frequency and code scanning test can be completed efficiently and accurately.
The aim of the application is achieved by the following technical scheme:
in a first aspect, the present application provides a phased array antenna pattern testing system, the system comprising a radio frequency subsystem, a synchronization control subsystem, and a data processing subsystem;
the synchronous control subsystem sequentially sends corresponding beam control codes to the radio frequency subsystem according to a plurality of angle synchronous pulse signals;
the radio frequency subsystem generates radio frequency signals of corresponding wave beams according to each wave beam control code;
after each beam control code is sent, the synchronous control subsystem sends a sampling trigger pulse signal to the radio frequency subsystem;
the radio frequency subsystem scans and samples the radio frequency signal according to the sampling trigger pulse signal to obtain the radio frequency signal amplitude and phase, and sends the radio frequency signal amplitude and phase to the data processing subsystem;
and the data processing subsystem generates a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal to finish the phased array antenna pattern test.
Optionally, the system further comprises a beam control code storage subsystem, the beam control code storage subsystem comprising a test computer and an instruction store-and-forward;
the test computer stores the beam control codes corresponding to the beams under all the test frequency points into the corresponding azimuth angles according to the sequence from the small pitch angle to the large pitch angle;
storing the azimuth angles into corresponding test frequency points in the order from small to large;
and storing the test frequency points into the instruction store-and-forward device according to the sequence from low to high.
Optionally, the system further comprises a test environment subsystem, the test environment subsystem comprising a microwave darkroom and a turntable, the test environment subsystem being for providing a test site and a test environment for antenna testing.
Optionally, the synchronization control subsystem includes an instruction store-and-forward, a test computer, and a turntable controller;
the test computer is used for sending the beam control code to the data processing subsystem;
the turntable controller controls the turntable to rotate the azimuth axis of the turntable in a stepping way according to a preset angle range and a preset angle to obtain a plurality of angle synchronous pulse signals;
the turntable controller transmits the plurality of angle synchronization pulse signals to the command store-and-forward device
And the instruction store-and-forward device sequentially sends the corresponding beam control codes to the radio frequency subsystem according to the plurality of angle synchronous pulse signals.
Optionally, the radio frequency subsystem includes a phased array antenna, and the phased array antenna performs frequency and beam pointing control according to frequency information, azimuth angle information and pitch angle information of each beam control code, so as to generate radio frequency signals of corresponding beams.
Optionally, the radio frequency subsystem further comprises a vector network analyzer and an auxiliary antenna;
under the condition that the phased array antenna is in a transmitting mode, the vector network analyzer inputs radio frequency signals into the phased array antenna through a radio frequency cable;
the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, and the radio frequency processing signals are sent to a vector network analyzer through the auxiliary antenna;
the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and sends the radio frequency signal amplitude and the radio frequency signal phase to the data processing subsystem.
Optionally, in a case where the phased array antenna is in a receiving mode, the vector network analyzer inputs the radio frequency signal to the auxiliary antenna through a radio frequency cable;
the auxiliary antenna transmits the radio frequency signal to the phased array antenna;
the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, and sends the radio frequency processing signals to a vector network analyzer;
the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and sends the radio frequency signal amplitude and the radio frequency signal phase to the data processing subsystem.
In a second aspect, the present application provides a phased array antenna pattern testing method, according to a plurality of angle synchronization pulse signals, corresponding beam control codes are sent;
generating radio frequency signals of corresponding beams according to each beam control code;
after each beam control code is sent, sending a sampling trigger pulse signal;
scanning and sampling the radio frequency signal according to the sampling trigger pulse signal to obtain the amplitude and the phase of the radio frequency signal;
and generating a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal, and completing the phased array antenna pattern test.
In a third aspect, the present application also proposes a computer device comprising a processor and a memory, the memory having stored therein a computer program loaded and executed by the processor to implement the phased array antenna pattern test method of the above second aspect.
In a fourth aspect, the present application also proposes a computer readable storage medium having stored therein a computer program loaded and executed by a processor to implement the phased array antenna pattern test method of the above second aspect.
The above-mentioned main scheme of the application and its various further alternatives can be freely combined to form multiple schemes, which are all the schemes that the application can adopt and claim; and the application can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The application discloses a phased array antenna pattern testing system and a method, wherein the system comprises a radio frequency subsystem, a synchronous control subsystem and a data processing subsystem, a beam control code to be tested is stored in an instruction storage repeater before testing, the synchronous control subsystem sends the beam control code to the radio frequency subsystem according to an angle synchronous pulse signal during testing, so that the radio frequency subsystem generates radio frequency signals of corresponding beams, then the synchronous control subsystem sends sampling trigger pulse signals to the radio frequency subsystem, the radio frequency signals are sampled to obtain radio frequency signal amplitude and phase, the radio frequency signal amplitude and phase are sent to the data processing subsystem, and finally the data processing subsystem generates corresponding angle domain patterns to finish pattern testing of all sections to be tested. The corresponding radio frequency signals are generated by utilizing the angle synchronous pulse signals, and the scanning acquisition of the radio frequency signals is completed, so that the phased array antenna pattern sweep frequency and the code scanning test can be completed efficiently and accurately.
Drawings
Fig. 1 shows an internal schematic diagram of a phased array antenna pattern testing system according to an embodiment of the present application.
Fig. 2 shows a phased array antenna pattern test system software interface diagram provided by an embodiment of the application.
Fig. 3 shows an interface schematic diagram of an instruction store-and-forward device according to an embodiment of the present application.
Fig. 4 shows a timing diagram of a test system according to an embodiment of the present application.
Fig. 5 shows a schematic flow chart of a phased array antenna pattern testing method according to an embodiment of the present application.
Fig. 6 is a schematic flow chart of another phased array antenna pattern testing method according to an embodiment of the present application.
FIG. 7 illustrates raw data and a processed orientation atlas provided by an embodiment of the present application.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the prior art, the traditional phased array radar antenna testing method adopts fixed frequency point and fixed wave beams, and the method has low testing efficiency and long period. Therefore, the efficient multi-beam and multi-frequency darkroom near field antenna receiving and measuring method is provided to greatly improve darkroom near field test efficiency and antenna test speed of the phased array radar antenna and shorten antenna test period. However, the measuring method is only used for near-field test of the receiving performance of the phased array antenna, the test efficiency is improved through multi-frequency-point multi-beam test, and the multi-frequency-point multi-beam test is completed by utilizing the time redundancy of the receiving working time slot (1920 us) of the phased array radar antenna. However, the transmitting working time slot is only 80us, which is only suitable for near field test of receiving performance of phased array radar antenna with a small part of pulse period long and a pulse width wide enough, and the method can not be used for multi-frequency point multi-beam test, and the phased array antenna with a short pulse period can not be used for testing according to the method. Meanwhile, the measuring method does not provide specific multi-frequency point and multi-beam setting operation steps, an instrument and equipment setting method and a test system connection schematic diagram, and the problem of synchronization of the working frequency point, the beam and the test system of the phased array radar antenna is not described, so that actual test and test operation is difficult to perform.
Both near field testing and far field testing can lengthen the time for generating the test phased array antenna pattern, so that in order to accurately and rapidly test the phased array antenna pattern, improvement and improvement of a conventional antenna pattern test method are required.
In order to solve the problems, the application provides a phased array antenna pattern test system, which not only can complete multi-beam control and synchronous test of radio frequency signals under each working frequency point in a phased array antenna and realize sweep frequency and code scanning test of the phased array antenna pattern, but also can greatly reduce the rotation times of a turntable, improve the test efficiency and carry out detailed description on the phased array antenna pattern test system.
Referring to fig. 1, fig. 1 shows an internal schematic diagram of a phased array antenna pattern test system according to an embodiment of the present application, where the system includes a radio frequency subsystem, a synchronization control subsystem, and a data processing subsystem, where the synchronization control subsystem sequentially sends corresponding beam control codes to the radio frequency subsystem according to a plurality of angle synchronization pulse signals.
The radio frequency subsystem generates radio frequency signals of corresponding beams according to each beam control code.
After each beam control code is sent, the synchronization control subsystem sends a sampling trigger signal to the radio frequency subsystem.
The radio frequency subsystem scans and samples the radio frequency signal according to the sampling trigger pulse signal to obtain the amplitude and the phase of the radio frequency signal, and sends the amplitude and the phase of the radio frequency signal to the data processing subsystem.
And the data processing subsystem generates a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal, and completes the phased array antenna pattern test.
The phase data processing subsystem can complete data processing of the directional patterns, and extracts data of each beam under each angle of each frequency point according to the storage sequence of the beam control codes to generate corresponding angle domain directional patterns.
The array control antenna pattern testing system also comprises a testing environment subsystem, wherein the testing environment subsystem consists of a microwave darkroom and a turntable and is used for providing a testing field and a testing environment for antenna testing.
When the turntable rotates by one angle step, a time gap is generated between two angle synchronous pulses, in the time gap, the synchronous control subsystem respectively sends a plurality of sampling trigger pulse signals to a vector network analyzer in the radio frequency subsystem, the vector network analyzer scans and samples the radio frequency signals of corresponding data points when receiving one sampling trigger pulse signal, data is stored in a test data file through automatic reading of test software until the sampling of the radio frequency signals of all beams is completed, finally, the turntable is controlled to return to the test origin position, a 'test completion' popup window is output to give a prompt,
fig. 2 shows a phased array antenna pattern test system software interface diagram provided by an embodiment of the present application, from which beam control codes, vector network analyzers, and turntables can be controlled and displayed. The test system not only needs to traverse all frequency points to be tested and carry out corresponding radio frequency signal tests, but also needs to traverse all wave beams to be tested once under the set frequency points and carry out corresponding radio frequency signal acquisition, thereby realizing the frequency sweep and code scanning tests of the phased array antenna pattern, greatly reducing the rotation times of the turntable and improving the test efficiency.
In addition, the phased array antenna pattern test system also comprises a beam control code storage subsystem, wherein the beam control code storage subsystem comprises a test computer and an instruction storage transponder, the test computer stores the beam control codes corresponding to all beams under all the test frequency points into azimuth angles according to the sequence from the pitch angle to the large, then stores the azimuth angles into the test frequency points according to the sequence from the small to the large, and stores the test frequency points into the instruction storage transponder according to the sequence from the low to the high.
In addition, the synchronization control subsystem includes an instruction store-and-forward, turret controller, and a test computer for transmitting the beam control code to the data processing subsystem.
The turntable controller controls the turntable to rotate the azimuth axis of the turntable in a stepping way according to the preset angle range and the preset angle to obtain a plurality of angle synchronous pulse signals;
the turntable controller sends a plurality of angle synchronous pulse signals to the command storage transponder
And the command store-and-forward device sequentially sends the corresponding beam control codes to the radio frequency subsystem according to the plurality of angle synchronous pulse signals.
The beam control codes are different under different working frequencies and different beam pointing angles, so that the frequency, the azimuth angle and the pitch angle are all one of the component parts of the beam control codes and are used for controlling the beams of the phased array antenna so as to generate radio frequency signals of corresponding beams. The beam control code also includes a frame header, an address code, a frequency information code, an angle information code, a stuff byte, a check code, a frame tail, and the like.
The instruction store-and-forward device is composed of an FPGA chip and a peripheral circuit and is used for storing beam control codes, completing serial port rate conversion, meeting the baud rate requirement of a phased array antenna, sequentially transmitting the beam control codes to the phased array antenna in the radio frequency subsystem one by one according to the set baud rate according to angle synchronous pulse signals so as to control the beams of the phased array antenna, enabling the phased array antenna to generate radio frequency signals of corresponding beams, and outputting a sampling trigger pulse to a vector network analyzer after each instruction is transmitted, and synchronously scanning and collecting the radio frequency signals.
Fig. 3 shows an interface schematic diagram of an instruction store-and-forward device according to an embodiment of the present application. The command store-and-forward device is used as a bridge and a tie between the test control computer, the phased array antenna, the turntable controller and the vector network analyzer, so that the command store-and-forward device is combined and works cooperatively and orderly, an interface between the command store-and-forward device and the turntable controller is a BNC interface, an angle synchronous pulse is input, the BNC interface is also adopted with the vector network analyzer, and a sampling trigger pulse is output. The instruction store-and-forward device is connected with the phased array antenna through a DB9 interface, outputs a beam control code, is connected with the test controller through the DB9 interface, and writes the beam control code.
The angle synchronous pulse can determine the sending time of the beam control code, when the turntable runs to a designated angle point, the angle synchronous pulse is sent out, and after the command storage repeater receives the pulse, the beam control code is sent out in sequence, so that the one-to-one correspondence between the turntable angle and the radio frequency signals of the corresponding beam of the phased array antenna can be realized. For example, a pattern may be tested at angles from-90 ° to 90 ° with 0.1 ° intervals, requiring 1801 point data acquisition, i.e., -90, -89.9, -89.8, and up to 89.8, 89.9, 90, with a set of rf signal data acquisition for every 0.1 ° turn of the turntable.
In one possible embodiment, the test operating frequency band is set to be 3 frequency points of high, medium and low, the pitch angle is set to be 0 °,45 °,90 °,135 °,180 °,225 °,270 °,315 °, the azimuth angle is set to be 0 °,10 °,20 °,30 °,40 °,50 °,60 °, a total of 3×2×7=42 patterns need to be tested, if the test is performed by dividing into 4 sections (0 °,45 °,90 °,135 °), 39 patterns are obtained after removing 3 repeated 0 ° patterns, and since (0 ° ) and (180 °) are the same pattern, and repeated test is not required, 4 sections need to be tested for 4×39=156 patterns. The baud rate of the phased array antenna is set to 500k, the beam control code is set to 10 bytes, each byte is 10 bits, the sending time of the beam control code is 10 x 10/500000=200 mus, the beam setup time of the phased array antenna is less than or equal to 20 mus, and in order to obtain a stable radio frequency signal, a delay of 5us is performed after the beam setup for testing the radio frequency signal.
The time required for one test point at this time is:(the beam setup time and delay time may also be included in the transmission time of the next beam control code for testing, which can further shorten the test time), the angular step of the turntable is set to 0.1 °, at which time the maximum theoretical rotational speed of the turntable is setAnd (3) reserving a certain margin, setting the rotating speed of the rotary table to be 6 degrees/s, and completing the directional diagram test of which the rotating angle is +/-90 degrees with the time consumption of 30 s. According to the prior art, the forward and reverse rotation mode is adopted for testing, the instrument setting, the acceleration and deceleration time in the turntable starting and stopping process and the time for transmitting the beam control code are ignored, and 39×30=11 is needed for completing the testing of 39 directional diagrams70s。
Therefore, the application can greatly save the occupation time of the test work on the microwave darkroom and the instrument and equipment, and the test efficiency is improved by tens of times, because the construction cost of the microwave darkroom is huge, the instrument and equipment such as the vector network analyzer are expensive, and the economic benefit is very remarkable after the test efficiency is improved.
The turntable controller and the command storage transponder are in hardware synchronization, the command storage transponder is in hardware synchronization with the phased array antenna and the vector network analyzer, and the vector network analyzer is in software synchronization with the test control computer.
In addition, the radio frequency subsystem comprises a phased array antenna, and the phased array antenna performs frequency and beam pointing control according to the frequency information, azimuth angle information and pitch angle information of each beam control code to generate radio frequency signals of corresponding beams.
The radio frequency subsystem further comprises a Vector Network Analyzer (VNA) for accurate measurement of electronic linear components and components of active and passive circuits or assemblies at low frequencies (as LCR tables) and in the high frequency range of even the THz range and the optical range, and auxiliary antennas.
In one possible implementation, the phased array antenna has two modes, a transmit mode and a receive mode, respectively.
Under the condition that the phased array antenna is in a transmitting mode, a signal source of the vector network analyzer inputs radio frequency signals into the phased array antenna through a radio frequency cable, the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, the radio frequency processing signals are transmitted to the vector network analyzer through auxiliary antennas by utilizing space propagation in a dark room, the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and the vector network analyzer scans and samples the radio frequency processing signals to obtain the radio frequency signal amplitude and the radio frequency signal phase and transmits the radio frequency signal amplitude and the radio frequency signal phase to the data processing subsystem.
Under the condition that the phased array antenna is in a receiving mode, a signal source of the vector network analyzer inputs radio frequency signals into the auxiliary antenna through the radio frequency cable, and the auxiliary antenna transmits the radio frequency signals to the phased array antenna through space propagation in a dark room; the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, the radio frequency processing signals are sent to the vector network analyzer, the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and the radio frequency signal amplitude and the radio frequency signal phase are sent to the data processing subsystem.
The directional diagram has an amplitude directional diagram and a phase directional diagram, the directional diagram must be generated by amplitude and phase data of each test angle point before the phased array antenna directional diagram is tested, and the amplitude and phase data of each test angle point can be corresponding to the angle value of the corresponding test angle point when the subsequent data processing is carried out.
In one possible case, setting the scanning type of the vector network analyzer as a section scanning mode, setting the triggering source of the vector network analyzer as external triggering, setting the triggering range as channel triggering, setting the triggering mode as point scanning, setting the measurement triggering as rising edge or falling edge, setting each frequency point to be tested as a section, setting the starting frequency and the ending frequency of each section as the frequency value of the frequency point to be tested, and setting the number of scanning points of a section table as the number of beams to be tested to obtain the radio frequency signal amplitude and the radio frequency signal phase.
Referring next to fig. 4, fig. 4 shows a timing chart of a test system provided by an embodiment of the present application, where each time the vector network analyzer receives a sampling trigger pulse from the command synchronous transponder, a data point is scanned and tested, a segment table is tested, and a next segment table is tested until all data points in all segment tables are tested. I.e. each time a sampling trigger pulse is received, a data point is scanned and tested until the scanning and testing of the data of all the test beams under each test frequency point are completed.
In order to further describe the phased array antenna pattern testing system, in a possible implementation manner, fig. 5 shows a schematic flow chart of a phased array antenna pattern testing method according to an embodiment of the present application. The phased array antenna pattern test system completes all steps of the code scanning test of the phased array antenna pattern, and the steps are as follows:
firstly, erecting a phased array antenna, connecting instrument equipment, and powering up and preheating after checking and confirming that the error exists;
secondly, running test software, selecting a beam control code file to be tested, setting the baud rate of the instruction store-and-forward device and the phased array antenna, clicking a 'write' button, sequentially writing the control codes of all beams into the instruction store-and-forward device, and automatically sending out a first normal beam control code;
thirdly, initializing instrument equipment, rotating azimuth angles and pitch angles of the turntable, and aligning electric axes of the phased array antenna through radio frequency signal levels;
fourthly, setting parameters such as limit angle, rotation angle and speed, pulse angle and pulse step of the turntable;
fifthly, setting parameters such as a measurement channel, frequency, power, intermediate frequency bandwidth and the like of the vector network analyzer, automatically setting a trigger source of the vector network analyzer as external trigger by test software, setting a trigger range as channel trigger, setting a trigger mode as point scanning, and setting measurement trigger as rising edge trigger;
sixthly, clicking a 'pattern test' button, wherein test software controls the turntable to rotate a test start angle and then run towards a stop angle, and the turntable controller outputs angle synchronous pulses according to a set pulse angle range and pulse steps;
a seventh step of sequentially sending out stored beam control codes after the command storage repeater receives the angle synchronous pulse, controlling the beam direction of the phased array antenna, generating radio frequency signals of corresponding beams by the phased array antenna, and outputting a sampling trigger pulse to the vector network analyzer after each beam control code is sent out;
eighth, after the vector network analyzer receives the sampling trigger pulse, the radio frequency signal is synchronously collected until the set point number is collected, the software process is released, and the test software automatically stores or reads the data;
ninth, the test software judges whether the code scanning test triggered by the last angle synchronous pulse is finished, if not, the angle synchronous pulse of the turntable is used for triggering the command storage repeater to test, if yes, the turntable is controlled to rotate to the normal position, and then a popup window prompt of 'finishing the current profile test' is output;
tenth, changing the test section to finish the pattern test of other test sections;
eleventh, clicking the "data processing" button, the test software automatically processes the data, and obtains the pattern data of all tested beams under each test section.
Through the code scanning test of the embodiment of the application, the turntable only needs to be turned once to finish the directional patterns of all beams to be tested under the test section, thereby improving the test efficiency by more than 10 times; the method of writing the beam control code is adopted, so that the universality of testing different phased array antennas is realized; meanwhile, the phased array antenna pattern working in the transmitting mode and the phased array antenna pattern working in the receiving mode can be tested, and the amplitude pattern and the phase pattern can be tested.
In addition, in order to avoid the angle position difference between the first beam and the last beam, a step angle position test can be added in advance before the initial angle of the test, and the error can be reduced by shifting forward by half a step angle during data processing.
In addition, in order to improve the test efficiency, for the phased array antenna with sum and difference channels in the receiving mode or other multi-channel phased array antennas, the sum channel and the difference channel in the receiving mode of the phased array antenna are simultaneously subjected to frequency sweep and code sweep test by setting the vector network analyzer to be in a multi-channel test mode, so that the test efficiency is improved again in a multiple way, and the occupation of test resources is reduced.
Next, the phased array antenna pattern test system completes the sweep frequency and sweep code test of the phased array antenna pattern. In order to continuously improve the test efficiency, the scanning mode is set to be a 'section table' mode on the vector network analyzer, and meanwhile, the sweep frequency test and the code scanning test are realized, so that the test efficiency is continuously improved in a multiplied mode. The scanning type of the vector network analyzer is set to be in a section scanning mode, namely each test frequency point is set to be in a section, the starting frequency and the ending frequency of each section are frequency values of the test frequency point, and the number of scanning points is set to be the number of test beams.
The phased array antenna pattern test system completes the steps of frequency sweep and code sweep test of the phased array antenna pattern, and the steps are as follows:
firstly, erecting a phased array antenna, connecting instrument equipment, and powering up and preheating after checking and confirming that the error exists;
secondly, running test software, selecting a beam control code file to be tested, setting the baud rate, clicking a write button, and sequentially writing the beam control code to be tested into the instruction store-and-forward device;
thirdly, after writing, automatically sending out a control code of a first normal beam (the control code of the normal beam is applicable to each working frequency point), setting a vector network analyzer, adjusting the azimuth angle and the pitch angle of the turntable, and aligning radio frequency signals of the phased array antenna;
fourthly, setting parameters such as limit angle, rotation angle, pulse stepping, rotating speed and the like of the turntable through test software;
fifthly, setting parameters such as scanning type, frequency, power and the like of a measuring channel and a segment table of the vector network analyzer through test software;
sixthly, clicking a 'pattern test' button, and automatically completing the test of the pattern by a test system, wherein the test system mainly comprises the following automatic test flow:
seventh, the testing software controls the azimuth angle of the turntable to rotate to an initial angle and then to rotate to a final angle, and outputs an angle synchronous pulse to the instruction storage transponder according to the set pulse angle range and the step;
eighth, the command store-and-forward device sequentially transmits the stored beam control codes to the phased array antenna every time an angle synchronization pulse is received, and outputs a sampling trigger pulse to the vector network analyzer every time a beam control code is transmitted;
ninth, after the phased array antenna receives the beam control code, the phased array antenna performs frequency and beam pointing control according to the frequency, azimuth angle and pitch angle information in the beam control code to generate corresponding radio frequency signals;
tenth, each time the vector network analyzer receives a sampling trigger pulse, the radio frequency signal of a data point is scanned and sampled until the sampling of the set scanning point number is completed;
eleventh, the test software automatically reads and stores data after the vector network analyzer finishes sampling the set scanning points each time. Namely, each time the turntable rotates for one pulse step, the vector network analyzer finishes one scanning (single), and the test software reads and stores data once;
twelfth, changing the test section of the phased array antenna to finish the directional diagram test of all the test sections.
Thirteenth, click "data processing" button, generate and save the directional diagram data of all beam pointing angles under all frequency points of the current test section. The multi-beam sweep frequency and code scanning test of the phased array antenna is realized, and the turntable rotates once to complete the directional pattern test of all beam directions under all frequency points of the current test section.
Sweep and sweep test of the multi-channel phased array antenna pattern is described next. In order to improve the test efficiency again, for a phased array antenna with sum and difference channels in a receiving mode or other multi-channel phased array antennas, a plurality of measuring tracks are set by utilizing a plurality of receivers on a vector network analyzer, and multi-channel test is performed at the same time, so that multi-channel, frequency sweeping and code sweeping test are realized.
The specific setting steps are as follows: based on the sweep frequency and sweep code test, according to the actual fact that the radio frequency cable of each channel of the phased array antenna is connected with the receiver of the vector network analyzer, the measuring track to be tested is added under the menu of track to New track of the vector network analyzer. As an exemplary embodiment, the "sum channel" of the phased array antenna is connected to the "a" receiver of the vector network analyzer, the "azimuth difference channel" is connected to the "B" receiver, the "elevation difference channel" is connected to the "R2" receiver, and the port 1 of the vector network analyzer is used as the emission source for output, and then the measurement track of the vector network analyzer is set as follows: "TR 1A/R1, 1", "TR 2B/R1, 1", "TR 3R 2/R1,1".
The rest setting methods and test flows are the same in the steps of frequency sweeping and code sweeping test.
The vector network analyzer is set to be in a multi-channel test mode, the sum channel and the difference channel in the phased array antenna receiving mode are subjected to frequency sweeping and code scanning test at the same time, the test efficiency is improved again in a multiple mode, and the occupation of test resources is reduced.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
and when the first turntable rotates by one step, the corresponding radio frequency signals are generated by utilizing the angle synchronous pulse signals, and the scanning acquisition of the radio frequency signals is completed, so that the phased array antenna pattern test can be efficiently and accurately completed.
Secondly, the needed beam control instructions are stored in the instruction store-and-forward device before testing, and aiming at different phased array antennas, when the instruction store-and-forward device receives an angle synchronous pulse from the turntable, the stored beam control instructions are sequentially sent out one by one, so that the process that the beam control instructions are required to be repeatedly calculated and generated in the conventional testing method during testing is omitted, the efficiency of beam switching operation is greatly improved, and necessary conditions are created for realizing frequency sweeping and code scanning testing;
and the third test and the single test obtain the directional diagrams of all beam scanning angles of each test frequency point under the test section, so that the rotation times of the turntable are greatly reduced, and the test efficiency is greatly improved.
Referring to fig. 6, fig. 6 is a flow chart illustrating another phased array antenna pattern testing method according to an embodiment of the application. The method corresponds to the phased array antenna pattern test, realizes the beneficial effects of the phased array antenna pattern test system, and comprises the following steps:
s110, corresponding beam control codes are sent according to the plurality of angle synchronous pulse signals.
S120, generating radio frequency signals of corresponding wave beams according to each wave beam control code.
S130, after each beam control code is sent, a sampling trigger pulse signal is sent.
And S140, scanning and sampling the radio frequency signal according to the sampling trigger pulse signal to obtain the amplitude and the phase of the radio frequency signal.
And S150, generating a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal, and completing the phased array antenna pattern test.
The testing software controls the azimuth angle of the turntable to rotate to an initial angle and then to rotate to a final angle, and outputs an angle synchronous pulse to the instruction storage transponder according to the set pulse angle range and the step;
the instruction store-and-forward device sequentially transmits the stored beam control codes to the phased array antenna when receiving an angle synchronization pulse, and outputs a sampling trigger pulse to the vector network analyzer after transmitting one beam control code;
after the phased array antenna receives the beam control code, the phased array antenna performs frequency and beam pointing control according to the frequency, azimuth angle and pitch angle information in the beam control code to generate corresponding radio frequency signals;
the vector network analyzer receives a sampling trigger pulse to scan and sample the radio frequency signal of the data point until the sampling of the set scanning point number is completed;
after the turntable rotates to the termination angle, the testing software controls the turntable to return to the testing origin position, and outputs a 'test completion' popup window.
Clicking the data processing button to generate and store the directional diagram data of all beam pointing angles under all frequency points of the current test section. Namely, multi-beam sweep frequency and code scanning test of the phased array antenna, and the turntable rotates once to finish the directional pattern test of all beam directions under all frequency points of the current test section;
changing the test section of the phased array antenna and finishing the directional diagram test of all the sections to be tested.
Referring to fig. 7, fig. 7 shows the raw data and the processed direction atlas provided by the embodiment of the application. And carrying out far-field pattern sweep and code scanning test on a phased array antenna arranged on a working platform, wherein after the obtained original data and data are processed, 3 test frequency points are arranged under a section, and the patterns of 11 wave beams under each frequency point are pointed.
The embodiment of the application provides a computer device, which can realize the steps in the phased array antenna pattern testing method provided by the embodiment of the application, so that the beneficial effects of the phased array antenna pattern testing method provided by the embodiment of the application can be realized, and detailed descriptions of the foregoing embodiments are omitted.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, an embodiment of the present application provides a storage medium having stored therein a plurality of instructions capable of being loaded by a processor to perform the steps in the phased array antenna pattern test method provided by the embodiment of the present application.
Wherein the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
The steps in the phased array antenna pattern testing method provided by the embodiment of the present application can be executed due to the instructions stored in the storage medium, so that the beneficial effects of the phased array antenna pattern testing method provided by the embodiment of the present application can be achieved, and detailed descriptions of the foregoing embodiments are omitted.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. A phased array antenna pattern testing system, comprising a radio frequency subsystem, a synchronization control subsystem, and a data processing subsystem;
the synchronous control subsystem sequentially sends corresponding beam control codes to the radio frequency subsystem according to a plurality of angle synchronous pulse signals;
the radio frequency subsystem generates radio frequency signals of corresponding wave beams according to each wave beam control code;
after each beam control code is sent, the synchronous control subsystem sends a sampling trigger pulse signal to the radio frequency subsystem;
the radio frequency subsystem scans and samples the radio frequency signal according to the sampling trigger pulse signal to obtain the radio frequency signal amplitude and phase, and sends the radio frequency signal amplitude and phase to the data processing subsystem;
and the data processing subsystem generates a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal to finish the phased array antenna pattern test.
2. The phased array antenna pattern test system of claim 1, further comprising a beam control code storage subsystem, the beam control code storage subsystem comprising a test computer and an instruction store-and-forward;
the test computer stores the beam control codes corresponding to the beams under all the test frequency points into the corresponding azimuth angles according to the sequence from the small pitch angle to the large pitch angle;
storing the azimuth angles into corresponding test frequency points in the order from small to large;
and storing the test frequency points into the instruction store-and-forward device according to the sequence from low to high.
3. The phased array antenna pattern testing system of claim 1, further comprising a test environment subsystem, the test environment subsystem comprising a microwave camera and a turntable, the test environment subsystem for providing a test site and a test environment for antenna testing.
4. The phased array antenna pattern test system of claim 1, wherein the synchronization control subsystem comprises an instruction store-and-forward, a test computer, and a turret controller;
the test computer is used for sending the beam control code to the data processing subsystem;
the turntable controller controls the turntable to rotate the azimuth axis of the turntable in a stepping way according to a preset angle range and a preset angle to obtain a plurality of angle synchronous pulse signals;
the turntable controller transmits the plurality of angle synchronization pulse signals to the command store-and-forward device
And the instruction store-and-forward device sequentially sends the corresponding beam control codes to the radio frequency subsystem according to the plurality of angle synchronous pulse signals.
5. The phased array antenna pattern test system of claim 1, wherein the radio frequency subsystem comprises a phased array antenna that performs frequency and beam pointing control based on frequency information, azimuth angle information, elevation angle information for each of the beam control codes, generating radio frequency signals for the corresponding beams.
6. The phased array antenna pattern testing system of claim 5, wherein the radio frequency subsystem further comprises a vector network analyzer and an auxiliary antenna;
under the condition that the phased array antenna is in a transmitting mode, the vector network analyzer inputs radio frequency signals into the phased array antenna through a radio frequency cable;
the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, and the radio frequency processing signals are sent to a vector network analyzer through the auxiliary antenna;
the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and sends the radio frequency signal amplitude and the radio frequency signal phase to the data processing subsystem.
7. The phased array antenna pattern test system of claim 6, wherein the vector network analyzer inputs the radio frequency signal to the auxiliary antenna via a radio frequency cable with the phased array antenna in a receive mode;
the auxiliary antenna transmits the radio frequency signal to the phased array antenna;
the phased array antenna modulates and amplifies the radio frequency signals to obtain radio frequency processing signals, and sends the radio frequency processing signals to a vector network analyzer;
the vector network analyzer scans and samples the radio frequency processing signals to obtain radio frequency signal amplitude and radio frequency signal phase, and sends the radio frequency signal amplitude and the radio frequency signal phase to the data processing subsystem.
8. A phased array antenna pattern testing method is characterized in that corresponding beam control codes are sent according to a plurality of angle synchronous pulse signals;
generating radio frequency signals of corresponding beams according to each beam control code;
after each beam control code is sent, sending a sampling trigger pulse signal;
scanning and sampling the radio frequency signal according to the sampling trigger pulse signal to obtain the amplitude and the phase of the radio frequency signal;
and generating a corresponding angular domain pattern according to the amplitude and the phase of the radio frequency signal, and completing the phased array antenna pattern test.
9. A computer device comprising a processor and a memory having stored therein a computer program that is loaded and executed by the processor to implement the phased array antenna pattern test method of claim 8.
10. A computer readable storage medium having stored therein a computer program that is loaded and executed by a processor to implement the phased array antenna pattern test method of claim 8.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424655A (en) * | 2023-12-19 | 2024-01-19 | 成都天成电科科技有限公司 | Phased array antenna channel reverse-beating testing method and device based on vector network |
| CN117518206A (en) * | 2024-01-04 | 2024-02-06 | 湖南卫导信息科技有限公司 | Multi-beam phased array antenna performance parameter testing system and method |
| CN117590095A (en) * | 2024-01-18 | 2024-02-23 | 成都华兴大地科技有限公司 | Method for rapidly testing directional diagram of phased array antenna based on FPGA software |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424655A (en) * | 2023-12-19 | 2024-01-19 | 成都天成电科科技有限公司 | Phased array antenna channel reverse-beating testing method and device based on vector network |
| CN117424655B (en) * | 2023-12-19 | 2024-03-01 | 成都天成电科科技有限公司 | Phased array antenna channel reverse-beating testing method and device based on vector network |
| CN117518206A (en) * | 2024-01-04 | 2024-02-06 | 湖南卫导信息科技有限公司 | Multi-beam phased array antenna performance parameter testing system and method |
| CN117518206B (en) * | 2024-01-04 | 2024-04-26 | 湖南卫导信息科技有限公司 | Multi-beam phased array antenna performance parameter testing system and method |
| CN117590095A (en) * | 2024-01-18 | 2024-02-23 | 成都华兴大地科技有限公司 | Method for rapidly testing directional diagram of phased array antenna based on FPGA software |
| CN117590095B (en) * | 2024-01-18 | 2024-04-19 | 成都华兴大地科技有限公司 | Method for rapidly testing directional diagram of phased array antenna based on FPGA software |
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