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

A phased array radar and transmission channel technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of cumbersome human labor and error-prone, and improve the accuracy of far-field calibration, improve the degree of automation, and simplify the difficulty of far-field calibration Effect

Active Publication Date: 2015-02-18
CNGC INST NO 206 OF CHINA ARMS IND GRP
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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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  • Phased array radar transmitting channel far-field calibration method and system
  • Phased array radar transmitting channel far-field calibration method and system

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specific Embodiment

[0031] see figure 1 , the far-field calibration method of the phased array radar transmission channel involved in the present invention needs to set up two horn antennas at the far end, wherein the polarization direction of the first antenna is the same as that of the radar front, and the polarization direction of the second antenna The polarization direction of the radar front is perpendicular to each other, and the third antenna is erected next to the radar front. The third antenna is a strip array antenna, and the polarization direction is perpendicular to the polarization direction of the front.

[0032]During the far-field phase calibration of the transmitting channel, a single transmitting channel on the radar front transmits a test signal, and the first antenna is used to receive the test signal transmitted by the radar. The received signal is amplified by the amplifier and forwarded through the second antenna. The third antenna receives the signal transmitted by the s...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 蔡兴雨朱思桥任伦周游马英男兑雅娟
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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