Treating late-time instability of partially tetrahedral-gridded finite difference time domain method
Journal
IEEE Antennas and Propagation Society International Symposium, 1998 Digest - Antennas: Gateways to the Global Network - Held in conjunction with: USNC/URSI National Radio Science Meeting
Journal Volume
1
Pages
562-565
Date Issued
1998
Author(s)
Hwang, Chieh-Tsao
Abstract
A partially tetrahedral-gridded FDTD method has recently been proposed to solve the time-domain electromagnetic scattering of two or threedimensional arbitrarily shaped dielectric objects [1],[2]. It successfully employs the conventional FDTD method for most of the regular region but introduces (.he tetrahedral edgebaaed finite element scheme to model the region near the arbitrarily curved surfaces. Numerical results of early time simulation validate that the method has the advantages of accuracy, flexibility, stability, and computational effiriency. For the analyses of electromagnetic problems of high Q systems, transient response over a very long duration is necessary. It is found that the simulation may suffer from late-time instability and spurious dc modes. This paper is focused on treating the two drawbacks of the hybrid method. ©1998 IEEE.
Other Subjects
Finite difference time domain method; Numerical methods; Transient analysis; Convergence of numerical methods; Dielectric materials; Electromagnetic wave transmission; Finite difference method; Finite element method; Mathematical models; Time domain analysis; Curved surfaces; Dielectric objects; Electromagnetic problems; Finite element schemes; Long duration; Numerical results; Time domain electromagnetics; Time simulations; Time domain analysis; Electromagnetic field theory; Finite difference-time domain (FDTD) method; Late time instability
Type
conference paper
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