Array antenna calibration method and array antenna calibration device

Abstract

The invention relates to the technical field of mobile communication, in particular to an array antenna calibration method and an array antenna calibration device, used for calibrating an array antenna in real time in an open calibration environment. The method comprises the following steps: determining an initial beam weight vector matrix of an array antenna to be calibrated on the basis of a preset direction angle of each preset beam direction, emitting first calibration signals to the array antenna to be calibrated by means of a test antenna in a standard beam direction, determining a magnitude-phase error between the first calibration signal received by means of a center channel and the first calibration signal received by means of each channel on the basis of the first calibration signals received by each channel of the array antenna to be calibrated, and using the magnitude-phase error to calibrate the initial beam weight vector matrix, so as to obtain a compensation beam weightvector matrix. In this way, the beam forming of an array antenna can be effectively detected in an open scenario, so as to calibrate the magnitude-phase error of each channel of the array antenna.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to an array antenna calibration method and device. Background technique [0002] In the 5G communication era, large-scale active array antenna technology has become a key enabling technology. An active array antenna is a system for receiving or transmitting electromagnetic waves that is composed of an active circuit directly connected to each array element in the antenna array. Shaping ability, through the calibration of each channel corresponding to each array element, to ensure the consistency of amplitude and phase, so as to ensure the effectiveness of the shaping function. [0003] For the calibration of large-scale active array antennas, in the prior art, based on a closed anechoic chamber environment, an active (Over The Air, OTA) test method combining near-field and far-field is used to verify its beamforming performance. effectiveness. [0004] However...

AI Technical Summary

Problems solved by technology

[0004] However, the cost of the anechoic chamber is very expensive. Although the test results are highly accurate, the test efficiency is low. Therefore, the above-mentioned test method is only applicable to the laboratory research and development stage. For large-scale mass production, the above-mentioned test method based on the anechoic chamber is not suitable. Be applicable

Images