高阶FDTD方法在三维散射问题中的应用  

High-order FDTD for calculating three-dimensional scattering problems

作　　者：王志[1] 江谷传[1] 

机构地区：[1]安徽新华学院电子通信工程学院,安徽合肥230088

出　　处：《合肥工业大学学报（自然科学版）》2009年第11期1776-1779,共4页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(60671051)

摘　　要：从麦氏方程出发,详细推导了三维情形下散射问题中高阶FDTD方法的迭代公式,并实现了该方法对应的高阶PML吸收边界条件;在此基础上,对传统近远场外推公式进行了改进,将三次递归多项式理论与传统外推方法结合,提出了高阶外推方法,并将所作的改进对三维导体和介质目标的电磁散射特性进行了数值验证。The high-order FDTD formulation of three-dimensional scattering problems based on Maxwell＇s equations is introduced in detail and the PML absorbing boundary conditions corresponding to this method is presented. To improve the accuracy, the cubic polynomial interpolation method is combined with the near-to-far field transform theory. The scattering feature of three targets is computed with the new method. Numerical results are compared with the results obtained by the traditional FDTD method.

关 键 词：高阶时域有限差分 理想匹配层 近远场外推 

分 类 号：TN011[电子电信—物理电子学]