An array antenna calibration method and device

Abstract

The present invention relates to the technical field of mobile communication, and in particular to an array antenna calibration method and device for real-time calibration of an array antenna in an open calibration environment. The initial beam weight vector matrix of the array antenna to be calibrated, and transmit the first calibration signal to the array antenna to be calibrated through the test antenna of the standard beam direction, and based on the first calibration signal received by each channel of the array antenna to be calibrated, determine the center The amplitude and phase error of the first calibration signal received by the channel and the first calibration signal received by each channel of the channel, and use the amplitude and phase error to calibrate the initial beam weight vector matrix to obtain the compensation beam weight vector matrix, so that In the open scene, the beamforming of the array antenna is effectively detected, and the amplitude and phase errors of each channel of the array antenna are calibrated.

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...

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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

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