Time domain finite difference calculations using a variable step size

Author

Zivanovic, Svetlana ; Mei, Kenneth K.

Author_Institution

California Univ., Berkeley, CA, USA

fYear

1989

Firstpage

34

Abstract

The authors describe a novel method of computational electromagnetics which uses a variable step size (calculation increment) in the finite-difference technique (VSSFDM). The step size is kept small around discontinuities and larger away from them, thereby using only about 1/3 of the memory required by a straight application of K.S. Yee´s (1966) method. The results obtained by VSSFDM are very close to those obtained by the finite-difference method, but with a significant reduction in the required computer memory as well as CPU time. The numerical stability of the proposed approach is demonstrated, and the VSSDM is applied to a symmetric microstrip with a width to height ratio of one.<>

Keywords

difference equations; electromagnetism; time-domain analysis; CPU time; computational electromagnetics; discontinuities; memory; numerical stability; symmetric microstrip; time domain finite difference calculations; variable step size; width to height ratio; Application software; Boundary conditions; Central Processing Unit; Computational electromagnetics; Computer errors; Electromagnetic analysis; Electromagnetic waveguides; Finite difference methods; Testing; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1989. AP-S. Digest

Conference_Location

San Jose, CA, USA

Type

conf

DOI

10.1109/APS.1989.134604

Filename

134604