单频电磁辐射对雷达的干扰规律

doi:10.12305/j.issn.1001-506X.2021.02.10

Abstract

Abstract:

In order to improve the electromagnetic protection ability of radar and reveal the interference laws of single frequency electromagnetic radiation to radar, based on the principle of radar ranging, the blocking interference and false target interference laws are preliminary grasped through the analysis of nonlinear distortion for circuit firstly, and then the effect test is carried out to supplement and perfect the interference law. The results show that the single frequency electromagnetic radiation in the band is easy to interfere with the radar under test, and the critical interference field strength of the false target is significantly lower than that of the blocking interference, and the difference of the most sensitive part can reach 30 dB, but the sensitive bandwidth is 50% narrower than that of blocking interference. With the increase of interference field strength, the peak level compression of echo increases slowly first and then approximately linearly. Blocking interference will not affect the accuracy of detection distance, but will shorten the detection distance. The false target position is random. With the increase of interference field strength, the false target level first increases linearly and then gradually becomes constant.

Key words: radar, single frequency electromagnetic radiation, blocking interference, false target interference, interference law

CLC Number:

Kai ZHAO, Guanghui WEI, Xiaodong PAN, Xue DU, Shizhao REN. Interference laws of single frequency electromagnetic radiation to radar[J]. Systems Engineering and Electronics, 2021, 43(2): 363-368.

Figures/Tables 7

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Interference laws of single frequency electromagnetic radiation to radar

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