Phased array antenna calibration system and calibration method

Abstract

The present disclosure provides a phased array antenna calibration system and calibration method, which belongs to the field of antenna technology, and can solve the problems of complex structure, low calibration efficiency and accuracy of existing phased array antenna calibration systems. The phased array antenna calibration system disclosed in the present disclosure includes: a receiving probe, a phase test device, a host computer and a beam control module; the receiving probe is configured to collect the beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position; the phase test device is configured to generate test parameters according to the microwave signal and the beam signal; the host computer is configured to determine whether the phased array antenna to be tested meets the preset indicators according to the test parameters; if the phased array antenna to be tested does not meet the preset indicators, the test parameters are calculated according to the genetic algorithm, and optimized beam control data is generated; the beam control module is configured to generate a control voltage according to the optimized beam control data, and transmit the control voltage to the phased array antenna to be tested.

Description

Technical Field

[0001] The present invention belongs to the field of antenna technology, and in particular relates to a phased array antenna calibration system and calibration method. Background Art

[0002] Phased array antennas can change the shape of the entire antenna array's directional pattern by adjusting the feed phase of the antenna unit of the antenna array, i.e., beamforming technology, to achieve the purpose of beam scanning. Phased array antennas use digital phase shifters to achieve high-speed electronic scanning of antenna beams, with high speed and precision, and are widely used in vehicle-mounted and ship-mounted satellites, communication radars, millimeter wave base stations and other fields.

[0003] There are many types of phased array antennas, and liquid crystal phased array antennas are one of them. Liquid crystal phased array antennas usually use liquid crystal phase shifters to achieve the phase shifting function of the antenna unit. Since the consistency of the liquid crystal phase shifter is difficult to ensure during the preparation process, there will be certain differences in the initial phases of the various antenna units in the liquid crystal phased array antenna. The consequence of this difference is that the antenna beam cannot be scanned as expected, affecting the performance of the liquid crystal phased array antenna. Therefore, the liquid crystal phased array antenna needs to be calibrated. At present, mechanical calibration is generally used to calibrate the various antenna units in the phased array antenna, which requires a lot of manpower costs, and its calibration efficiency and accuracy cannot effectively meet the calibration requirements, affecting the performance of the liquid crystal phased array antenna. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provide a phased array antenna calibration system and calibration method.

[0005] In a first aspect, an embodiment of the present disclosure provides a phased array antenna calibration system, the phased array antenna calibration system comprising: a receiving probe, a phase test device, a host computer and a beam control module;

[0006] The receiving probe is configured to collect a beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position;

[0007] The phase test device is configured to generate a test parameter according to the microwave signal and the beam signal;

[0008] The host computer is configured to determine whether the phased array antenna to be tested meets preset indicators according to the test parameters; if the phased array antenna to be tested does not meet the preset indicators, the test parameters are calculated according to a genetic algorithm, and optimized beam control data is generated;

[0009] The beam control module is configured to generate a control voltage according to the optimized beam control data, and transmit the control voltage to the phased array antenna to be tested.

[0010] Optionally, the host computer is specifically configured as follows:

[0011] According to the test parameters, a plurality of initial beam control data are randomly generated as an initial population; wherein each of the initial beam control data in the initial population is regarded as an individual;

[0012] Calculating the gain value of the phased array antenna to be tested according to the initial beam control data, and using the gain value as the fitness of the individual in the initial population;

[0013] According to the fitness of the individuals in the initial population, some of the individuals are selected according to a first preset probability and copied into the next generation to generate the optimized beam control data.

[0014] Optionally, the first preset probability is positively correlated with the fitness.

[0015] Optionally, the host computer is further specifically configured to:

[0016] According to a second preset probability, a crossover operation is performed on some code fragments in the individuals entering the next generation.

[0017] Optionally, the crossover operation includes: single-point crossover or multi-point crossover.

[0018] Optionally, the host computer is further specifically configured to:

[0019] According to a third preset probability, mutation operations are performed on some code fragments in the individuals entering the next generation.

[0020] Optionally, the mutation operation includes: single-point mutation or multi-point mutation.

[0021] Optionally, the phased array antenna calibration system further includes: a microwave darkroom and a mobile module;

[0022] The phased array antenna to be tested and the receiving probe are arranged in the microwave darkroom;

[0023] The moving module is configured to control the receiving probe to move along a scanning direction of the beam signal radiated by the phased array antenna to be tested.

[0024] Optionally, the phase testing equipment includes: a vector network analyzer.

[0025] Optionally, the phase testing equipment includes: a spectrum analyzer and a microwave signal source.

[0026] Optionally, the phased array antenna includes: a liquid crystal phased array antenna.

[0027] In a second aspect, an embodiment of the present disclosure provides a phased array antenna calibration method, the phased array antenna calibration method comprising:

[0028] Collecting a beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position;

[0029] generating a test parameter according to the microwave signal and the beam signal;

[0030] According to the test parameters, determining whether the phased array antenna to be tested meets preset indicators; if the phased array antenna to be tested does not meet the preset indicators, calculating the test parameters according to a genetic algorithm and generating optimized beam control data;

[0031] A control voltage is generated according to the optimized beam control data, and the control voltage is transmitted to the phased array antenna to be tested.

[0032] In a third aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the phased array antenna calibration method provided above. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a phased array antenna calibration system provided by an embodiment of the present disclosure;

[0034] Figure 2 A schematic diagram of a moving trajectory of a receiving probe in a phased array antenna calibration system provided in an embodiment of the present disclosure;

[0035] Figure 3 A schematic diagram of a flow chart of a phased array antenna calibration method provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] A phased array antenna generally has at least two antenna units, each of which corresponds to a radio frequency channel, and can radiate beam signals or receive external electromagnetic wave signals to achieve communication functions. At present, each antenna unit in the phased array antenna is generally calibrated mechanically. During the calibration process, parameters such as the calibration matrix and the mutual coupling coefficient need to be calculated. The calibration system is relatively complex and requires a lot of manpower costs. Its calibration efficiency and accuracy cannot effectively meet the calibration requirements, affecting the performance of the phased array antenna. In order to solve one of the above-mentioned technical problems in the related art, an embodiment of the present disclosure provides a phased array antenna calibration system and calibration method. The phased array antenna calibration system and calibration method provided by the embodiment of the present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It can be understood that there are many types of phased array antennas. The phased array antenna calibration system and calibration method provided by the embodiment of the present disclosure are not only applicable to liquid crystal phased array antennas, but also applicable to other types of phased array antennas. The following will be explained by taking the liquid crystal phased array antenna as an example.

[0039] In a first aspect, an embodiment of the present disclosure provides a phased array antenna calibration system. Figure 1 A schematic diagram of the structure of a phased array antenna calibration system provided by an embodiment of the present disclosure is shown in FIG. Figure 1As shown, the phased array antenna calibration system includes: a receiving probe 101, a phase test device 102, a host computer 103 and a beam control module 104. The receiving probe 101 is configured to collect the beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position. The phase test device 102 is configured to generate test parameters according to the microwave signal and the beam signal. The host computer 103 is configured to determine whether the phased array antenna to be tested meets the preset indicators based on the test parameters; if the phased array antenna to be tested does not meet the preset indicators, the test parameters are calculated according to the genetic algorithm, and optimized beam control data is generated. The beam control module 104 is configured to generate a control voltage according to the optimized beam control data, and transmit the control voltage to the phased array antenna to be tested.

[0040] The phased array antenna to be tested may be a liquid crystal phased array antenna, which may convert microwave signals provided by other devices into beam signals and radiate them outward to realize communication functions. During the calibration process, the microwave signal may be provided by the phase test device 102, and during the application process, the microwave signal may be provided by the signal source module in the communication device. A liquid crystal phased array antenna is provided with a liquid crystal phase shifter, and the deflection angle of the liquid crystal molecules therein may be controlled by adjusting the control voltage input into the phase shifter to adjust the phase of the beam signal, so that the beam signal is scanned along a preset direction. In the embodiment of the present disclosure, one port of the liquid crystal phased array antenna may be connected to one port of the phase test device 102 to receive the microwave signal provided by the phase test device 102, and another port of the liquid crystal phased array antenna may be connected to one port of the beam control module 104 to receive the control voltage of the beam control module 104 to adjust the scanning direction of the beam signal radiated therefrom.

[0041] The receiving probe 101 may also be an antenna structure, which can receive the beam signal radiated by the liquid crystal phased array antenna. One port of the receiving probe 101 may be connected to a port of the phase test device 102, and the received beam signal radiated by the liquid crystal phased array antenna may be transmitted to the phase test device 102.

[0042] The phase test device 102 can generate test parameters according to the microwave signal provided by it and the beam signal radiated by the liquid crystal phased array antenna. The phase test device 102 can also be connected to a host computer and can transmit the generated test parameters to the host computer 103.

[0043] The host computer 103 receives the test data transmitted by the phase test device 102, and can judge whether the liquid crystal phased array antenna meets the preset indicators according to the test data, that is, whether the beam signal radiated by the liquid crystal phased array antenna is scanned according to the preset strength and the preset direction. If the host computer 103 detects that the liquid crystal phased array antenna does not meet the preset conditions, the test parameters are calculated using a genetic algorithm, and the initial beam control data is optimized according to certain rules to obtain optimized beam control data, so that the beam signal radiated by the liquid crystal phased array antenna is scanned according to the preset strength and the preset direction.

[0044] One port of the beam control module 104 can be connected to the host computer 103, and the other port can be connected to the liquid crystal phased array antenna. The beam control module 104 can receive the optimized beam control data calculated by the host computer, store the optimized beam control data, and generate a control voltage according to the optimized beam control data, and transmit the control voltage to the liquid crystal phased array antenna. The control voltage is used to adjust the deflection angle of the liquid crystal in the liquid crystal phase shifter of the liquid crystal phased array antenna, so that the beam signal radiated by the liquid crystal phased array antenna is scanned according to a preset intensity and a preset direction.

[0045] In the phased array antenna calibration system provided by the embodiment of the present disclosure, the phase test device 102 can generate test data according to the microwave signal of the liquid crystal phased array antenna and the beam signal received by the receiving probe 102, and the host computer 103 can calculate the test data using a genetic algorithm to obtain optimized beam control data. The beam control module can generate a control voltage according to the optimized beam control data, and adjust the deflection angle of the liquid crystal in the liquid crystal phase shifter of the liquid crystal phased array antenna through the control voltage, so that the beam signal radiated by the liquid crystal phased array antenna is scanned according to a preset intensity and a preset direction. It can be seen that the phased array antenna calibration system provided by the embodiment of the present disclosure only needs to use a genetic algorithm to iteratively calculate the test parameters, and it is not necessary to calculate parameters such as the calibration matrix and the mutual coupling coefficient, that is, the optimized beam control data can be obtained, the entire calibration process is fully automated, and the calibration system structure is simple, which can save a lot of manpower and time costs. Since the entire calibration structure is completed using a genetic algorithm, the approximate error caused by the conventional calibration algorithm is naturally avoided, and its calibration efficiency and calibration accuracy can meet the calibration requirements, so the performance of the liquid crystal phased array antenna can be improved.

[0046] In some embodiments, the host computer 103 is specifically configured to randomly generate a plurality of initial beam control data as an initial population according to the test parameters; wherein each initial beam control data in the initial population is regarded as an individual. According to the initial beam control data, the gain value of the phased array antenna to be tested is calculated, and the gain value is used as the fitness of the individual in the initial population. According to the fitness of the individual in the initial population, some individuals are selected according to the first preset probability, and copied into the next generation to generate optimized beam control data.

[0047] In the embodiment of the present disclosure, assuming that the initial beam control code length of the antenna unit in the liquid crystal phased array antenna is 5 bits, the initial population P(t) of the genetic algorithm can be generated as N random binary data strings with a length of 5 bits, and each individual corresponds to a set of beam control codes, as shown in Table 1:

[0048] Serial number 1 2 …… N Individual Value 01011 10110 …… 00100

[0049] Table 1

[0050] The phased array antenna calibration system can measure the antenna gain values ​​corresponding to different individuals, and the antenna gain value can be used as the fitness of the individual in the initial population. The higher the antenna gain value, the higher the fitness of the individual in the initial population, as shown in Table 2:

[0051] Serial number 1 2 …… N Individual Value 01011 10110 …… 00100 Fitness value 8 5 …… 11

[0052] Table 2

[0053] According to the fitness of the individual in the initial population, the individual to be copied into the next generation is selected. The replication probability can be determined according to the fitness of the individual in the initial population. In this example, the replication probability is positively correlated with the fitness. When the same operation is needed again, the current population is used as the initial population and the above operation is repeated. The details are shown in Table 3:

[0054] Serial number 1 2 …… N Individual Value 01011 10110 …… 00100 Fitness value 8 5 …… 11 choose 00100 01011 …… 00100

[0055] Table 3

[0056] It can be seen from the above table that in the new generation of population, individual 2 is screened out due to low fitness, and individual N obtains more copies due to high fitness. It should be noted that the above-mentioned replication probability is the first preset probability, and the replication probability is positively correlated with fitness, which can ensure that individuals with higher fitness can be replicated in large numbers to select the best individuals, thereby facilitating the acquisition of optimized beam control data.

[0057] In some embodiments, the host computer 104 is further specifically configured to perform a crossover operation on some code segments in the individuals entering the next generation according to the second preset probability. The crossover operation includes: single-point crossover or multi-point crossover.

[0058] In the embodiment of the present disclosure, a crossover operation is performed on the population formed by the selected individuals, and partial code fragments of two individuals in the population are exchanged with a second preset probability. Specifically, a single-point crossover method can be adopted, as shown in Table 4:

[0059] Serial number 1 2 …… N Individual Value 01011 10110 …… 00100 Fitness value 8 5 …… 11 choose 00100 01011 …… 00100 cross 01100 00011 …… 00100

[0060] Table 4

[0061] As can be seen from the above table, the first two bits of individual 1 and individual 2 are cross-exchanged to form two new individuals.

[0062] In some embodiments, the host computer 104 is further specifically configured to perform mutation operations on some code fragments in the individuals entering the next generation according to the third preset probability. The mutation operation includes: single-point mutation or multi-point mutation.

[0063] In the embodiment of the present disclosure, a mutation operation is performed on a population formed by selected individuals or a population formed by individuals after a crossover operation, so that part of the code fragment of an individual in the population is mutated with a third preset probability. Specifically, a single-point mutation method can be adopted, as shown in Table 5:

[0064] Serial number 1 2 …… N Individual Value 01011 10110 …… 00100 Fitness value 8 5 …… 11 choose 00100 01011 …… 00100 cross 01100 00011 …… 00100 Mutations 01100 00011 …… 00101

[0065] Table 5

[0066] It can be seen from the above table that by inverting the 5th bit of individual N, a new individual can be obtained.

[0067] The population composed of individuals obtained through the above genetic operation can be used as a new population P (t+1), and the individual fitness of the population P (t+1) can be tested again, and the above genetic operation can be continued until the preset stop condition is met, so that the individual with the highest fitness is obtained, that is, the optimized beam control code with the optimal gain value of the liquid crystal phased array antenna is obtained.

[0068] The phased array antenna calibration system also includes: a microwave darkroom 105 and a mobile module (not shown in the figure); the phased array antenna to be tested and the receiving probe 101 are arranged in the microwave darkroom 105; the mobile module is configured to control the receiving probe 101 to move along the scanning direction of the beam signal radiated by the phased array antenna to be tested.

[0069] In practical applications, the liquid crystal phased array antenna and the receiving probe can be both set in a microwave darkroom 105. The microwave darkroom is a closed environment with shielding materials on its side walls. On the one hand, it can prevent the signals in the external environment from interfering with the signals in the liquid crystal phased array antenna and the receiving probe 101. On the other hand, it can prevent other signals radiated by the liquid crystal phased array antenna itself from being transmitted to the receiving probe 101 to interfere with the received beam signal. The receiving probe 102 can be installed on a mobile module, and the receiving probe 101 can be controlled by a mobile device to move along the scanning direction of the beam signal radiated by the phased array antenna with a vehicle. The specific moving trajectory is as follows: Figure 2 shown.

[0070] In some embodiments, the phase testing device 102 includes a vector network analyzer.

[0071] Specifically, the phase testing device 102 can be a vector network analyzer, which is provided with two ports, one of which can provide a microwave signal for the liquid crystal phased array antenna, and the other port can transmit the beam signal received by the receiving probe 101 and form test parameters to determine whether the performance of the liquid crystal phased array antenna meets the preset indicators.

[0072] In some embodiments, the phase testing device 102 includes: a spectrum analyzer and a microwave signal source.

[0073] Specifically, the microwave signal source can provide microwave signals for the liquid crystal phased array antenna, and the spectrum analyzer can analyze the beam signal received by the receiving probe 101 and form test parameters to determine whether the performance of the liquid crystal phased array antenna reaches the preset indicators.

[0074] In a second aspect, an embodiment of the present disclosure provides a phased array antenna calibration method. Figure 3 A flow chart of a phased array antenna calibration method provided by an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the phased array antenna calibration method includes the following steps:

[0075] S301, collecting a beam signal radiated by the phased array antenna to be tested according to a provided microwave signal at a predetermined position.

[0076] S302, generating test parameters according to the microwave signal and the beam signal.

[0077] S303, judging whether the phased array antenna to be tested meets the preset index according to the test parameters; if the phased array antenna to be tested does not meet the preset index, executing step S304; if the phased array antenna to be tested meets the preset index, executing step S306;

[0078] S304, calculating the test parameters according to the genetic algorithm and generating optimized beam control data.

[0079] S305, generating a control voltage according to the optimized beam control data, and transmitting the control voltage to the phased array antenna to be tested;

[0080] S306, recording current beam control data.

[0081] It should be noted that steps S301 to S306 in the phased array antenna calibration method provided in the embodiment of the present disclosure can be respectively executed by the receiving probe 101, phase test equipment 102, host computer 103 and beam control module 104 in the phased array antenna calibration system provided in the above embodiment. The technical effects and implementation methods thereof can refer to the above discussion on the technical effects and implementation methods of the phased array antenna calibration system, and will not be repeated here.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0084] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0085] In a third aspect, the embodiments of the present disclosure provide a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the phased array antenna calibration method of any of the above embodiments is implemented. The implementation principle and beneficial effects are the same as those of the above phased array antenna calibration method, and will not be repeated here.

[0086] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0087] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), an optical fiber device, and a portable read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0088] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. The storage medium may be a read-only memory, a disk or an optical disk, etc.

[0091] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A phased array antenna calibration system, characterized in that: The phased array antenna calibration system includes: a receiving probe, a phase test device, a host computer and a beam control module; The receiving probe is configured to collect a beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position; The phase test device is configured to generate a test parameter according to the microwave signal and the beam signal; The host computer is configured to determine whether the phased array antenna to be tested meets preset indicators according to the test parameters; if the phased array antenna to be tested does not meet the preset indicators, the test parameters are calculated according to a genetic algorithm, and optimized beam control data is generated; The beam control module is configured to generate a control voltage according to the optimized beam control data, and transmit the control voltage to the phased array antenna to be tested; The host computer is specifically configured as follows: According to the test parameters, a plurality of initial beam control data are randomly generated as an initial population; wherein each of the initial beam control data in the initial population is regarded as an individual; Calculating the gain value of the phased array antenna to be tested according to the initial beam control data, and using the gain value as the fitness of the individual in the initial population; According to the fitness of the individuals in the initial population, some of the individuals are selected according to a first preset probability and copied into the next generation to generate the optimized beam control data.

2. The phased array antenna calibration system according to claim 1, characterized in that: The first preset probability is positively correlated with the fitness.

3. The phased array antenna calibration system according to claim 1, characterized in that: The host computer is also specifically configured as follows: According to a second preset probability, a crossover operation is performed on some code fragments in the individuals entering the next generation.

4. The phased array antenna calibration system according to claim 3, characterized in that: The crossover operation includes: single-point crossover or multi-point crossover.

5. The phased array antenna calibration system according to claim 1 or 3, characterized in that: The host computer is also specifically configured as follows: According to a third preset probability, mutation operations are performed on some code fragments in the individuals entering the next generation.

6. The phased array antenna calibration system according to claim 5, characterized in that: The mutation operation includes: single-point mutation or multi-point mutation.

7. The phased array antenna calibration system according to claim 1, characterized in that: The phased array antenna calibration system also includes: a microwave darkroom and a mobile module; The phased array antenna to be tested and the receiving probe are arranged in the microwave darkroom; The moving module is configured to control the receiving probe to move along a scanning direction of the beam signal radiated by the phased array antenna to be tested.

8. The phased array antenna calibration system according to claim 1, characterized in that: The phase testing equipment includes: a vector network analyzer.

9. The phased array antenna calibration system according to claim 1, characterized in that: The phase testing equipment comprises: a spectrum analyzer and a microwave signal source.

10. The phased array antenna calibration system according to claim 1, characterized in that: The phased array antenna includes: a liquid crystal phased array antenna.

11. A phased array antenna calibration method, characterized in that: The phased array antenna calibration method comprises: Collecting a beam signal radiated by the phased array antenna to be tested according to the provided microwave signal at a predetermined position; generating a test parameter according to the microwave signal and the beam signal; According to the test parameters, determining whether the phased array antenna to be tested meets preset indicators; if the phased array antenna to be tested does not meet the preset indicators, calculating the test parameters according to a genetic algorithm and generating optimized beam control data; Generate a control voltage according to the optimized beam control data, and transmit the control voltage to the phased array antenna to be tested; The step of determining whether the phased array antenna to be tested meets preset indicators according to the test parameters; if the phased array antenna to be tested does not meet the preset indicators, calculating the test parameters according to a genetic algorithm and generating optimized beam control data specifically includes: According to the test parameters, a plurality of initial beam control data are randomly generated as an initial population; wherein each of the initial beam control data in the initial population is regarded as an individual; Calculating the gain value of the phased array antenna to be tested according to the initial beam control data, and using the gain value as the fitness of the individual in the initial population; According to the fitness of the individuals in the initial population, some of the individuals are selected according to a first preset probability and copied into the next generation to generate the optimized beam control data.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the phased array antenna calibration method according to claim 11 is implemented.

Images