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Time domain finite difference calculations using a variable step size

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2 Author(s)
Zivanovic, S. ; California Univ., Berkeley, CA, USA ; Mei, K.K.

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.<>

Published in:

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

Date of Conference:

26-30 June 1989