A HIGH-ACCURACY FDTD ALGORITHM TO SOLVE MICROWAVE PROPAGATION AND SCATTERING PROBLEMS ON A COARSE GRID

被引：47

作者：

COLE, JB ^{[1
]}

机构：

[1] USN,RES LAB,WASHINGTON,DC 20375

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 1995年 / 43卷 / 09期

关键词：

D O I：

10.1109/22.414540

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

If the spatial variation of electric permittivity and magnetic permeability is ''small'' Maxwell's equations can be approximated by the scalar wave equation in each field component, We introduce a new high-accuracy second order finite-difference time-domain (FDTD) algorithm to solve the scalar wave equation on a coarse grid with a solution error less than 10(-4) that of the conventional one. The computational load at each grid point is greater, but it is more than offset by a large reduction in the number of grid points needed, as well as by a reduction in the number of iterations. Also boundaries can be more accurately characterized at the subgrid level. Although optimum performance is achieved at a fixed frequency, the accuracy is still much higher than that of a conventional FDTD algorithm over ''moderate'' bandwidths.

引用

页码：2053 / 2058

页数：6