Phased array radar transmitting channel far-field calibration method and system

Abstract

The invention relates to a phased array radar transmitting channel far-field calibration method and system. Two antennas are erected in a far field, the polarization manners of the two antennas are vertical to each other, an auxiliary antenna is mounted beside a radar array surface, the polarization manner of the auxiliary antenna is vertical to the radar array surface, and the auxiliary antenna is used for receiving signals transmitted by the second antenna in the far field. A radar signal processing machine performs phase testing on a signal transmitted by an auxiliary receiving channel, the phase of the signal transmitted by the auxiliary receiving channel is regarded as a transmitting reference phase, the phase of each channel transmitting signal of the radar array surface is compared with the transmitting reference phase, the required phase correction is acquired by subtraction, the phase shifter of a transmitting component is controlled to perform shifting according to the obtained phase correction, and transmitting channel far-field calibration is achieved. Compared with traditional methods, the calibration method and system has the advantages that signal measuring equipment such as a spectrometer and an oscilloscope which are erected at a far end is omitted, and reference clock transmitting to the far end is omitted.

Description

technical field [0001] The invention belongs to the technical field of one-dimensional phased array radar (hereinafter referred to as: radar) transceiver channel calibration, and specifically relates to a phased array radar transmit channel far-field calibration method and a system related to radar receive / transmit channel near-far field calibration channel program control Automatic switching equipment and its control method, transmission channel far-field calibration method; through the channel program-controlled automatic switching equipment, the radar front-end equipment is realized in the near-field calibration of the receiving channel, the far-field calibration of the receiving channel, the near-field calibration of the transmitting channel, and the far-field calibration of the transmitting channel. Automatic switching between 5 states of field calibration and normal operation; through the new far-field calibration method of the transmission channel, the local calibration ...

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Problems solved by technology

During the channel test process, it is necessary to constantly switch between the five states. The traditional method is that the tester manually changes the cable connection position of the test system and the connection relationship between the equipment, which requires a lot of tedious manpower, and requires the radar system and The equipment is very familiar and prone to errors

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