A three-dimensional FDTD subgridding algorithm based on interpolation of current density

Author

Xiao, Kai ; Pommerenke, David J. ; Drewniak, James L.

Author_Institution

Dept. of Electr. & Comput. Eng., Missouri Univ., Rolla, MO, USA

Volume

1

fYear

2004

Firstpage

118

Abstract

A three-dimensional subgridding algorithm for the finite difference time domain (FDTD) method is proposed in this paper. The method is based on interpolation of electric and magnetic current densities. The coarse-fine mesh ratio can be either 1:2 or 1:3. Results of a test model utilizing a lossless cavity excited with a dipole show no tendency of instability after 500000 time steps. The reflection in time domain at the subgridding interface was calculated to test the accuracy of the subgridding algorithm.

Keywords

current density; electromagnetic compatibility; finite difference time-domain analysis; interpolation; FDTD algorithm; coarse-fine mesh ratio; dipole excitation; electric current density; electromagnetic modeling; finite difference time domain method; instability; interpolation; lossless cavity; magnetic current density; subgridding interface; three-dimensional subgridding algorithm; Current density; Extrapolation; Finite difference methods; Geometry; Interpolation; Magnetic domains; Spline; Stability criteria; Testing; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2004. EMC 2004. 2004 InternationalSymposium on

Print_ISBN

0-7803-8443-1

Type

conf

DOI

10.1109/ISEMC.2004.1350008

Filename

1350008