17 June 1996 Modeling and stability considerations for FDTD analysis of wave propagation in lossy dispersive soils
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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.
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William H. Weedon, William H. Weedon, Carey M. Rappaport, Carey M. Rappaport, Daniel Silevitch, Daniel Silevitch, } "Modeling and stability considerations for FDTD analysis of wave propagation in lossy dispersive soils", Proc. SPIE 2747, Radar Sensor Technology, (17 June 1996); doi: 10.1117/12.243082; https://doi.org/10.1117/12.243082
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