含腔电大尺寸导体目标电磁散射的一体化数值模拟  

Globalized numerical modeling of electromagnetic scattering from conductive targets with open cavity and electrically large size

作　　者：聂在平[1] 王浩刚[1] 

机构地区：[1]电子科技大学微波工程系,成都610054

出　　处：《物理学报》2003年第12期3035-3042,共8页Acta Physica Sinica

摘　　要：应用等效原理 ,通过引入口面上等效磁流将含腔导电目标电磁散射简化为腔内、外两个等效问题 .腔内问题分段求解并应用级联法获得口面等效导纳矩阵 ;腔内外的耦合关系应用近似边界元方法描述并由此获得口面等效磁流 ;最后 ,这一具有混合源的腔体内外一体化散射问题则应用所提出的广义混合场积分方程方法建立电磁模型 ,并用多层快速多极子方法实现高效数值求解 .实例计算结果与测试结果具有很好的一致性 .In this paper, the electromagnetic scattering from conductive target with open cavity has been simplified as two (inner and outer) equivalent models by using the equivalence principle and introducing an equivalent magnetic current in the aperture of the cavity. For the inner part of the cavity, the equivalent conductance matrix has been obtained by use of connection scheme. Approximate boundary integral method has been used to describe the coupling between inner and outer parts of the cavity, and to obtain the aperture equivalent magnetic current. Finally, the general combined field integral equation was presented to form the electromagnetic model of the scattering problem, and the multilevel fast multipole algorithm was used to solve this problem efficiently. Numerical examples show good agreement between calculated results and measured data.

关 键 词：数值模拟 含腔目标 电磁散射 混合场积分方程 雷达目标 广义网络 导纳矩阵 

分 类 号：TN953[电子电信—信号与信息处理]