N阶色散媒质宽频电磁散射特性的高效分析  

High-efficiency scattering analysis of Nth-order dispersive media over a broad frequency band

作　　者：陈明生[1] 吴琼[2] 沙威[3] 黄志祥[2] 吴先良[1,2] 

机构地区：[1]合肥师范学院物理与电子工程系,安徽合肥230601 [2]安徽大学电子科学与技术学院,安徽合肥230039 [3]香港大学电子工程系

出　　处：《系统工程与电子技术》2010年第11期2313-2316,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金重点项目(60931002);国家自然科学基金(61001033);安徽省自然科学基金(090412047);安徽省优秀青年科技基金(10040606Y08);安徽省科技计划(09020204029)资助课题

摘　　要：在目标宽频电磁响应分析中引入Maehly逼近理论,应用矩量法(method of moments,MOM)求解给定频带内若干节点处目标的表面电、磁流,以形成关于电、磁流的Chebyshev多项式逼近,最后转化为Maehly逼近以提高计算精度。结合PMCHW方程,对各种形状三维介质目标、N阶色散介质目标的宽带电磁散射特性进行了分析。数值仿真表明:在不占用更多内存的情况下,Maehly逼近方法能够有效提高宽频分析的计算效率。The Maehly approximation theory is proposed to obtain the frequency response of scattering problems over a broad frequency band.The method of moments（MOM） is applied at given frequency points to form a Chebyshev approximation for the surface current.And the Chebyshev series is matched to be a rational function via Maehly approximation to improve the accuracy.The PMCHW equation is applied to the scattering analysis of arbitrarily shaped dielectric objects and Nth-order dispersive objects over a broad frequency band.It is shown by the simulation that the Maehly approximation method is found to be efficient for scattering analysis over a broad frequency band with low memory consumption.

关 键 词：矩量法 PMCHW方程 Maehly逼近 宽带雷达散射截面 

分 类 号：TN011[电子电信—物理电子学]