Multi-target measurement and control communication antenna array optical fiber closed-loop calibration method

Abstract

The invention discloses a multi-target measurement and control communication antenna array optical fiber closed-loop calibration method, and aims to solve the problems of multiple antenna error calibration test parameters, inconsistency of receiving channels including antenna unit mutual coupling and large test quantity. The method provided by the technical scheme of the invention comprises the steps that a calibration signal generation unit generates receiving and transmitting calibration baseband signals based on a starting instruction; the receiving calibration baseband signal is subjectedto up-conversion to a radio frequency through the calibration frequency conversion unit, is transmitted to optical transmission equipment, is transmitted to the optical receiving / transmitting module of an antenna subarray through an optical fiber, is coupled to each receiving channel, and is transmitted to an amplitude-phase consistency measurement unit through the optical fiber after being processed, so that closed-loop calibration of receiving channels is realized; the transmitting calibration baseband signal is output to a receiving / transmitting calibration switch network through a switch network and a coupler and transmitted to rear-end optical transmission equipment; and the transmitting calibration baseband signal is obtained through down conversion and transmitted to the amplitude-phase consistency measurement unit, and closed-loop calibration of transmitting channels is achieved.

Description

technical field [0001] The invention relates to wireless communication, in particular to a correction signal sending method of an antenna channel. Especially the method of calibrating the channel of antenna array with optical fiber closed-loop. Background technique [0002] With the continuous development of phased array technology, array antennas are introduced into measurement and control, and a time-sharing multi-target tracking method based on array antennas appears. The realization scheme is that the array antenna adopts an array of antenna elements with a certain directional gain, and is equipped with mechanical servo tracking. As the target moves, the antenna elements with the same isotropy and gain are arranged in a certain way to form an antenna array. The array antenna beam is required to meet the requirements of pointing accuracy, gain, and main lobe width. In order to meet the requirements of the pointing accuracy, gain, and main lobe width of the antenna patt...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the existing technology, to provide a closed-loop calibration system for antenna array channel optical fiber that can simplify the traditional calibration mode, accurate calibration, reliable use, and more stable calibration results, so as to solve antenna errors There are many calibration test parameters, the inconsistency of each receiving channel including the mutual coupling of antenna units, and the problem of large test volume

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