电波科学学报2024，Vol.39Issue(2)：205-213,9.DOI:10.12265/j.cjors.2023110
雷达带外三阶互调伪信号干扰效应预测模型
Prediction model of out-of-band third-order intermodulation pseudo-signal interference effect for radar
摘要
Abstract
In order to evaluate the anti-electromagnetic interference performance of radar equipment,based on the mechanism of pseudo-signal interference effect of electromagnetic radiation,the relationship between the contribution of out-of-band multi-frequency third-order intermodulation signal and in-band single-frequency pseudo-signal interference effect is clarified,and the concept of pseudo-signal interference effect index is introduced.The evaluation model of third-order intermodulation pseudo-signal interference effect is established,and the model correction method and effect test prediction process are proposed based on the change rule of pseudo-signal level value.Taking a stepped-frequency continuous wave ranging radar as the research object,the out-of-band third-order intermodulation critical pseudo-signal interference effect test of the tested radar is carried out by using the method of differential mode injection equivalent substitution of electromagnetic radiation.The results show that the influence of the third-order intermodulation pseudo-signal interference increases first and then decreases with the increase of the radiation frequency offset in the range of 0.2-2.2 GHz on both sides of the radar working center frequency.The experimental verification is carried out by changing the interference frequency point,field strength combination and pseudo-signal sensitive level.It is proved that the accuracy of the third-order intermodulation pseudo-signal interference model is better than 2 dB,which can objectively evaluate the third-order intermodulation pseudo-signal interference of radar equipment.关键词
雷达装备/三阶互调/电磁辐射/伪信号干扰/效应评估Key words
radar equipment/third-order intermodulation/electromagnetic radiation/pseudo-signal interference/effect evaluation分类
数理科学引用本文复制引用
魏光辉,赵宏泽,杜雪,潘晓东,吕旭旭..雷达带外三阶互调伪信号干扰效应预测模型[J].电波科学学报,2024,39(2):205-213,9.基金项目
国防基础科研重点项目(50909030201) （50909030201）
重点实验室基金(6142205200301) （6142205200301）
