Quick phased-array antenna calibrating method and system

Abstract

The invention discloses a quick phased-array antenna calibrating method and system. The quick phased-array antenna calibrating method includes calculating phase of each antenna unit via algorithm calculation by measuring sum signal power value of sum signals in 4 (N-1) phase change times (N is the number of phase-array antenna units) along with the antenna units; changing reference channels, measuring power values of the sum signals in 4 (N-1) phase change times along with the antenna units and calculating amplitude of the antenna units through algorithm calculation. By the quick phased-array antenna calibrating method, measuring times and operation are few, the integral calibration process costs less system occupation time, and the phased-array antenna calibrating method is rapid; the integral process has no need to directly measure phase, engineering implement is simple, and power measurement is more stable and reliable as compared with phase measurement, and the quick phased-array antenna calibrating method is robust. When some channels of phased-array antennas have faults, phase difference and amplitude value of other channels are effective by the calibrating method, fault pervasion is avoided, and the quick phased-array antenna calibrating method has the advantage of robustness.

Description

technical field [0001] The invention relates to the technical field of antenna measurement, in particular to a phased array antenna rapid calibration method and a calibration system. Background technique [0002] In a phased array antenna system, the expected beam scanning can be obtained by adjusting the phase of each antenna element. However, the number of phased array units is large, the structure is asymmetrical due to processing accuracy, and the inconsistency of the device itself. In addition, the fluctuation of the antenna itself and the mutual coupling between the antenna units make the amplitude and phase of each antenna unit different from the expected If the values ​​are different, the performance of the array will not reach the best working condition, or even the required technical conditions, which will affect the communication quality. Therefore, after the phased array antenna is assembled, it needs to be measured and calibrated. The purpose is to eliminate th...

AI Technical Summary

Problems solved by technology

The disadvantage of the commutation measurement method is that, in general, the coefficient matrix is ​​not full of rank, and other prior knowledge must be introduced when solving the measurement equation, which will also lead to a long measurement time and low test efficiency

[0008] The measurement speed of the above measurement methods is not fast enough. It is generally used for the verification and calibration of the phased array antenna development stage, and cannot meet the measurement and calibration of a large number of engineering needs.

Images