有限差分法结合预条件共轭梯度分析三维电磁散射问题  

The Analysis of Three-Dimensional Electromagnetic Scattering Problems by Using the Preconditioned Conjugate-Gradient Technique Together with the Finite-Difference Frequency-Domain

作　　者：刘淑静[1] 朱汉清[1] 

机构地区：[1]淮阴师范学院物理系,江苏淮安223001

出　　处：《淮阴师范学院学报（自然科学版）》2003年第4期285-288,共4页Journal of Huaiyin Teachers College;Natural Science Edition

基　　金：江苏省教育厅自然科学基金资助项目(99KJD140005)

摘　　要：引入预条件共轭梯度法,提出了结合频域有限差分法分析三维电磁散射问题.数值计算过程中利用Mur二阶吸收边界条件和Maxwell方程组积分形式的频域差分离散格式.作为算例,分析了理想导体金属块对平面电磁波的散射,由于使用了预条件共轭梯度法求解差分矩阵方程,从而减少了计算时间.数值结果表明了该方法的有效性.The finite-difference frequency-domain method with preconditioned conjugate-gradient technique is presented for three-dimensional electromagnetic scattering problems. The Mur's absorbing boundary condition for FDFD approximation and the discrete formulation of Maxwell's equation in integral form are applied. As the verification example, the scattering by a conductive cube of the perfect electric conductor is analyzed. The CPU time is greatly reduced by using multifrontal method to solve the finite-difference equations. The numerical results demonstrate its accuracy and efficiency.

关 键 词：预条件共轭梯度法 频域有限差分法 电磁散射 

分 类 号：TN817[电子电信—信息与通信工程] O441[理学—电磁学]