Calibration system and calibration method for phased-array antenna

Patent metadata

Field	Value
Publication number	US-12095170-B2
Application number	US-202117548559-A
Country	US
Kind code	B2
Filing date	Dec 12, 2021
Priority date	Mar 23, 2021
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A calibration system and a calibration method for a phased-array antenna are provided. The calibration system includes a receiving probe, a parameter tester, an upper computer and a beam controller. The receiving probe may acquire a beam signal, which is radiated by a to-be-tested phased-array antenna according to a provided microwave signal, at a preset position. The parameter tester may generate a test parameter according to the microwave signal and the beam signal. The upper computer may determine whether the to-be-tested phased-array antenna meets a preset index according to the test parameter, and in a case where the to-be-tested phased-array antenna does not meet the preset index, calculate the test parameter according to a genetic algorithm to generate optimized beam control data. The beam controller may generate a control voltage according to the optimized beam control data, and transmit the control voltage to the to-be-tested phased-array antenna.

First claim

What is claimed is:

1. A calibration system for a phased-array antenna, comprising: a receiving probe, a parameter tester, an upper computer, and a beam controller; wherein
the receiving probe is configured to acquire a beam signal, which is radiated by a to-be-tested phased-array antenna according to a microwave signal, at a preset position;
the parameter tester is configured to generate a test parameter according to the microwave signal and the beam signal;
the upper computer is configured to determine whether the to-be-tested phased-array antenna meets a preset index according to the test parameter, and in a case where the to-be-tested phased-array antenna does not meet the preset index, calculate the test parameter according to a genetic algorithm to generate optimized beam control data; and
the beam controller is configured to generate a control voltage according to the optimized beam control data, and transmit the control voltage to the to-be-tested phased-array antenna.

2. The calibration system according to claim 1 , wherein the upper computer is further configured to
randomly generate a plurality of initial beam control data as an initial population according to the test parameter, wherein each of the plurality of initial beam control data in the initial population is an individual;
calculate gains of the to-be-tested phased-array antenna according to the plurality of initial beam control data, wherein the gains are used as adaptabilities of individuals in the initial population, respectively; and
select some of the individuals, according to the adaptabilities of the individuals in the initial population, at a first preset probability, and replicate selected individuals into a next generation to generate the optimized beam control data.

3. The calibration system according to claim 2 , wherein the first preset probability has a positive correlation with the adaptabilities.

4. The calibration system according to claim 2 , wherein the upper computer is further configured to
perform a crossover operation on some code fragments of the individuals entering the next generation, at a second preset probability.

5. The calibration system according to claim 4 , wherein the crossover operation comprises a single-point crossover operation or a multipoint crossover operation.

6. The calibration system according to claim 2 , wherein the upper computer is further configured to
perform a mutation operation on some code fragments of the individuals entering the next generation, at a third preset probability.

7. The calibration system according to claim 6 , wherein the mutation operation comprises a single-point mutation operation or a multipoint mutation operation.

8. The calibration system according to claim 1 , further comprising a microwave darkroom and a motion driver, wherein
the to-be-tested phased-array antenna and the receiving probe are in the microwave darkroom; and
the motion driver is configured to control the receiving probe to move along a scanning direction of the beam signal radiated by the to-be-tested phased-array antenna.

9. The calibration system according to claim 1 , wherein the parameter tester comprises a vector network analyzer.

10. The calibration system according to claim 1 , wherein the parameter tester comprises a spectrum analyzer and a microwave signal source.

11. The calibration system according to claim 1 , wherein the parameter tester comprises a power meter and a microwave signal source.

12. The calibration system according to claim 1 , wherein the phased-array antenna comprises a liquid crystal phased-array antenna.

13. A calibration method for a phased-array antenna, comprising:
acquiring a beam signal, which is radiated by a to-be-tested phased-array antenna according to a provided microwave signal, at a preset position;
generating a test parameter according to the microwave signal and the beam signal;
determining whether the to-be-tested phased-array antenna meets a preset index according to the test parameter, and in a case where the to-be-tested phased-array antenna does not meet the preset index, calculating the test parameter according to a genetic algorithm to generate optimized beam control data; and
generating a control voltage according to the optimized beam control data, and transmitting the control voltage to the to-be-tested phased-array antenna.

14. The calibration method according to claim 13 , further comprising:
randomly generating a plurality of initial beam control data as an initial population according to the test parameter, wherein each of the plurality of initial beam control data in the initial population is an individual;
calculating gains of the to-be-tested phased-array antenna according to the plurality of initial beam control data, and taking the gains as adaptabilities of individuals in the initial population; and
selecting some of the individuals, according to the adaptabilities of the individuals in the initial population, at a first preset probability, and replicating selected individuals into a next generation to generate the optimized beam control data.

15. The calibration method according to claim 14 , wherein the first preset probability is positively correlated with the adaptabilities.

16. The calibration method according to claim 14 , further comprising:
performing a crossover operation on some code fragments of the individuals entering the next generation, at a second preset probability.

17. The calibration method according to claim 16 , wherein the crossover operation comprises a single-point crossover operation or a multipoint crossover operation.

18. The calibration method according to claim 14 , further comprising:
performing a mutation operation on some code fragments of the individuals entering the next generation, at a third preset probability.

19. The calibration method according to claim 18 , wherein the mutation operation comprises a single-point mutation operation or a multipoint mutation operation.

20. A non-transitory computer-readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the calibration method for a phased-array antenna according to claim 13 .

Assignees

• Beijing Boe Technology Dev Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Guo Junwei
• Liu Zongmin
• Fan Xichao
• Li Wei
• Qu Feng

Classifications

• H01Q3/36

  with variable phase-shifters · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B17/12 Primary

  of transmit antennas, e.g. of the amplitude or phase · CPC title

• G06N3/126

  Evolutionary algorithms, e.g. genetic algorithms or genetic programming · CPC title

• G06N3/006

  based on simulated virtual individual or collective life forms, e.g. social simulations or particle swarm optimisation [PSO] · CPC title