提高电场积分方程求解精度的有效方法  

Effective approach to improve the sloving precision of electric field integral equation

作　　者：宋开宏[1] 张庆华[1] 吴先良[1] 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230039

出　　处：《系统工程与电子技术》2009年第11期2553-2555,共3页Systems Engineering and Electronics

基　　金：国家自然科学基金(60671051);安徽省教育厅自然科学基金重点项目(KJ2009A53)资助课题

摘　　要：为了提高矩量法求解电场积分方程的精度和效率,提出了一种改善电场积分方程求解精度的新方法。该方法首先在粗网格剖分下由电场积分方程求出不精确的感应电流,然后由此不精确的感应电流可求得散射体上任意一点处的散射磁场,最后由该点处的总磁场求出该点处的高精度感应电流。将该方法应用于无限长导体圆柱和方柱的散射计算中,数值结果表明了在粗网格剖分下该方法的有效性和高精度性。To improve the accuracy and efficiency for solving the EFIE （electric field integral equation） by the method of moment, a novel scheme is put forward to improve the calculation precision based on the EFIE. Firstly, the inaccurate induced current is obtained by solving the EFIE under coarse mesh grids. Secondly, the scattered magnetic field at any given point on the surface of the object is calculated by the inaccurate induced cur- rent. Finally, the accurate induced current at any given point is determined through total magnetic field. The proposed approach is applied to the case of infinitely perfectly electric conducting circular cylinder and square cylinder. The numerical results are presented to demonstrate the high precision and efficiency when the size of mesh grid is large.

关 键 词：电磁散射 矩量法 电场积分方程 感应电流 网格尺寸 

分 类 号：TN911.2[电子电信—通信与信息系统]