介质涂覆目标电磁散射特性计算与仿真  

Calculation and Simulation of Electromagnetic Scattering Characteristics of Targets Coated with Dielectric Medium

作　　者：周超[1] 张小宽[1] 赵辉[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《计算机仿真》2013年第10期120-123,142,共5页Computer Simulation

摘　　要：研究涂覆介质减小散射场优化问题,导体表面涂覆介质能有效吸收电磁波、减小目标本来的雷达散射截面(Radar Cross Section,RCS)。针对介质涂覆目标的散射基理分析及S仿真计算RCS缩减问题,研究了介质涂覆材料对目标电磁散射特性的影响,分析了涂覆材料的吸波原理,推导了关于表面积分方程的高阶矩量法,采用RWG基函数的选取与处理,建立复杂目标电磁计算模型。最后,根据研究复杂介质涂覆目标RCS的分析需要,用高阶矩量法仿真某型巡航导弹和高速飞行器涂覆介质时的双站散射特性,结果表明,上述方法能有效解决电大尺寸复杂介质涂覆目标的散射优化问题,为介质涂覆材料在导弹上的设计应用提供了依据。Coated dielectric on surface of conductor can efficiently absorb electromagnetic wave and change origi- nal RCS of target. Analysis on theory of coated target and calculation of RCS are both important and difficult in the simulation process in RCS- reducing. In order to investigate the influence on electromagnetic scattering, dielectric absorption theory was analysed, high order method of moment（MoM） based on surface integral equations was derivat- ed, RWG basis functions was discussed, and complex target calculation model was established. Finally, according to the demand of analysis for the RCS calculation of complex dielectric coated target, the bistatic scattering eharacterfs- tics of a cruise missile and a high - speed aircraft model were calculated. This algorithm has some value in efficiently solving scattering problems of electrically - large complex coated targets. And the high order MoM method greatly de- creases computational load and saves computer storage, providing a support for material＇s design and application.

关 键 词：介质涂覆 高阶矩量法 散射特性 电大目标 

分 类 号：TN011[电子电信—物理电子学]