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Proceedings Paper

Modeling and stability considerations for FDTD analysis of wave propagation in lossy dispersive soils
Author(s): William H. Weedon; Carey M. Rappaport; Daniel Silevitch
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Paper Abstract

The finite-difference time-domain (FDTD) algorithm, when modified to include dispersion, is a convenient tool for analyzing wave propagation in lossy, dispersive soils. It has been shown recently that a convenient way to include the dispersion is through a spatial array of digital permittivity or conductivity filters, one filter at each space node in the finite-difference grid. We address here the problem of selecting filter coefficients that result in accurate and stable FDTD implementations. We present a systematic procedure for determining the coefficients based on a nonlinear optimization procedure and stability test.

Paper Details

Date Published: 17 June 1996
PDF: 7 pages
Proc. SPIE 2747, Radar Sensor Technology, (17 June 1996); doi: 10.1117/12.243082
Show Author Affiliations
William H. Weedon, Northeastern Univ. (United States)
Carey M. Rappaport, Northeastern Univ. (United States)
Daniel Silevitch, Northeastern Univ. (United States)


Published in SPIE Proceedings Vol. 2747:
Radar Sensor Technology
Gerald S. Ustach, Editor(s)

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