Deformation active phased array radar detection performance rapid assessment method based on electromechanical coupling

Abstract

The invention discloses a deformation active phased array radar detection performance rapid assessment method based on electromechanical coupling. The method comprises the following steps: 1) determining an array antenna array element type of an active phased array radar; 2) determining a structure parameter and an electromagnetic working parameter of an array antenna; 3) computing an ideal antenna directional diagram and an antenna important performance parameter based on the array antenna radiation principle; 4) performing structure analysis on a radar antenna under certain working environment load; 5) obtaining array antenna unit structure displacement; and 6) rapidly determining the radar main detection performance index after deformation according to a radar main detection performanceanalysis parameter model before and after antenna structure deformation. Through the method disclosed by the invention, the rapid prediction and analysis method of the radar detection performance ofthe radar under the environment load effect after the antenna array structure deformation is realized.

Description

technical field [0001] The invention belongs to the field of radar antennas, in particular to the rapid evaluation of detection performance of active phased array radar based on electromechanical coupling theory. It can quickly realize the radar detection performance evaluation under the action of external load during the service phase of the radar. Background technique [0002] Radar is an electronic device that uses electromagnetic waves to detect targets. The antenna is the part of the radar that emits and receives electromagnetic waves. The radar transmitting antenna emits electromagnetic waves to irradiate the target and uses the receiving antenna to receive its echo. From this, the distance from the target to the electromagnetic wave transmitting point, the distance change rate (radial velocity), and location, altitude, etc. With the continuous advancement of science and technology, traditional radars are increasingly unable to meet the growing military needs. Theref...

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Problems solved by technology

[0003] The working environment of phased array radar is complex. During the service stage, the antenna array is subjected to external environmental loads and internal thermal loads, causing structural deformation of the antenna array, and changes in the spatial structure of the antenna unit. According to the electromagnetic field theory, the electromagnetic waves emitted by the antenna unit are in the far field. The spatial phase difference changes during de-superposition, and the mutual coupling relationship between the antenna elements is changed, which leads to the distortion of the antenna far-field pattern

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