基于改进物理光学法的电大目标双站RCS的预估  

Bistatic RCS prediction with improved PO method for electrically large targets

作　　者：陈博韬[1] 雷振亚[1] 谢拥军[2,1] 李晓峰[1] 满铭远[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,陕西西安710071 [2]北京航空航天大学电磁兼容实验室,北京100083

出　　处：《电波科学学报》2010年第5期960-965,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(批准号:60771040)

摘　　要：研究了电大尺寸目标双站电磁散射的改进物理光学法。针对以往双站高频算法由于忽略阴影区电流影响,导致大双站角下计算误差有所增大的问题,提取电流步进法中的迭代算子,考虑阴影区不同面元的耦合影响,与图形电磁计算方法相结合,推导出了改进的物理光学公式。分别提取照明区和阴影区面元,按照入射波方向进行排序迭代求解,快速有效地计算了电大目标的双站雷达散射截面(RCS)。通过与多层快速多极子,以及高低频混合方法进行对比,验证了该方法的有效性和准确性。The bistatic radar cross section （RCS） prediction with improved physical optics（PO） method for electrically large targets combined is presented in this paper. Since the previous high-frequency methods neglet the current impact of shadow zone and lead to the increasing errors of the large angle bistatic calculation, this method is deduced by introducing the current marching technique into the conventional physical optics method. Combined with graphical electromagnetic computing method that extracts the illuminated and shadow facet in accordance with the direction of the incident sort iteration, the bistatic RCS of a conductive target can be exactly calculated. Compared with multilevel fast multipole algorithm and the hybrid method, the numerical results show that this method is efficient and accurate.

关 键 词：改进物理光学方法 电流步进法 图形电磁学 双站雷达散射截面 

分 类 号：TN011[电子电信—物理电子学]