复杂电磁环境辐射-散射耦合场快速预估方法  

Fast prediction method for radiated and scattered coupled fields in complex electromagnetic environment

作　　者：苏东林[1,2] 崔朔 白江飞 李尧尧[2] SU Donglin;CUI Shuo;BAI Jiangfei;LI Yaoyao(School of Electronic and Information Engineering,Beihang University,Beijing 100083,China;Research Institute for Frontier Science,Beihang University,Beijing 100083,China;Shenyuan Honors College,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083 [2]北京航空航天大学前沿科学技术创新研究院,北京100083 [3]北京航空航天大学沈元学院,北京100083

出　　处：《北京航空航天大学学报》2022年第9期1553-1560,共8页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：针对复杂电磁环境中目标散射体和干扰辐射源同时存在,影响目标回波散射场的问题,提出了一种基于辐射源方向图和极化散射矩阵数据的耦合场快速预估方法。利用可提前独立获取和加载的辐射源方向图及目标各个方向的散射数据,实现了辐射-散射耦合场景下空间总电磁场的近实时快速预估。仿真计算了辐射源与散射体不同距离和相对强度下场景的总电场变化情况,验证了辐射-散射耦合效应对目标回波场存在显著影响。无需使用电磁计算方法对场景进行重新计算,满足复杂电磁环境内场仿真试验对实时提供数据的需求,具有工程应用价值。A coupled scattered field fast prediction method based on the radiation source pattern and polarization scattering matrix is proposed for the complex electromagnetic environment in which the target and interfering radiation sources exist simultaneously and affect the scattered field of the target.The near real-time fast prediction of the overall electromagnetic field in the radiation-scattering coupled scenario is made possible by utilizing the radiation source pattern and the scattering data of all directions of the target,which can be independently obtained and loaded in advance.The effects of the radiation-scattering coupling on the scene’s echo field are determined through simulations by calculating the changes in the total electric field of the radiation source and scatter at different distances and relative strengths.Calculation of the whole field of the scene doesn’t involve electromagnetic calculation methods,which meets the demand for real-time data provision in the complex electromagnetic environment infield simulation test and is engineering applicable.

关 键 词：雷达散射截面 有源干扰 快速预估 极化散射矩阵 辐射方向图 

分 类 号：TN974[电子电信—信号与信息处理] V221.92[电子电信—信息与通信工程]