雷达装备二阶互调伪信号干扰效应预测模型  

Prediction model of second-order intermodulation pseudo-signal interference effect for radar equipment

作　　者：赵宏泽 魏光辉 杜雪 潘晓东 吕旭旭 Zhao Hongze;Wei Guanghui;Du Xue;Pan Xiaodong;LüXuxu(National Key Laboratory of Electromagnetic Environment Effects,Army Engineering University(Shijiazhuang Campus),Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学(石家庄校区)电磁环境效应国家重点实验室,石家庄050003

出　　处：《强激光与粒子束》2023年第8期89-97,共9页High Power Laser and Particle Beams

基　　金：国防基础科研重点项目(50909030201);重点实验室基金资助项目(6142205200301)。

摘　　要：为掌握雷达装备的抗电磁干扰性能,需要对其进行全面的电磁环境效应测试与评估,为雷达应用及电磁防护加固提供技术支撑。从二阶互调电磁辐射伪信号干扰效应机理出发,引入效应指数的概念将复杂电磁环境适应性的多变量问题用单一变量表征,实现了雷达装备复杂电磁环境伪信号干扰效应的定量表征,建立了二阶互调伪信号干扰效应评估模型。以某型扫频连续波测距雷达为研究对象,针对受试雷达在试验中出现的二阶互调伪信号干扰现象,给出了模型参数的确定方法,提出雷达装备二阶互调伪信号干扰效应预测评估方法。实验验证结果表明:无论是改变伪信号敏感电平,还是在大辐射频偏、大互调频差范围内改变双频电磁辐射组合,采用普适性二阶互调伪信号干扰效应模型对受试雷达进行二阶互调伪信号干扰效应评估,评估误差均在2.5 dB以内,依据效应预测方法能够客观评估雷达装备二阶互调伪信号干扰。To master the anti-electromagnetic interference performance of radar equipment,it is necessary to carry out comprehensive electromagnetic environment effect test and evaluation to provide technical support for radar application and electromagnetic protection reinforcement.Based on the mechanism of pseudo-signal interference effect of second-order intermodulation electromagnetic radiation,the concept of effect index is introduced to characterize the multivariable problem of complex electromagnetic environment adaptability with a single variable.The quantitative characterization of pseudo-signal interference effect of radar equipment in complex electromagnetic environment is realized,and the evaluation model of pseudo-signal interference effect of second-order intermodulation is established.Taking a certain type of sweep frequency continuous wave ranging radar as the research object,aiming at the second-order intermodulation pseudo-signal interference phenomenon in the test radar,the method of determining the model parameters is given,and the prediction and evaluation method of the second-order intermodulation pseudo-signal interference effect of radar equipment is proposed.Experimental verification shows that whether it is to change the pseudo-signal sensitivity level,or to change the dual-frequency electromagnetic radiation combination in the range of large radiation frequency offset and large intermodulation difference,the universal second-order intermodulation pseudo-signal interference effect model can be used to evaluate the second-order intermodulation pseudo-signal interference effect of the tested radar.The evaluation error is within 2.5 dB,and the second-order intermodulation pseudo-signal interference of radar equipment can be objectively evaluated according to the effect prediction method.

关 键 词：雷达装备 二阶互调 电磁辐射 伪信号干扰 效应评估 

分 类 号：O441[理学—电磁学]