FDTD Dispersive Modeling With High-Order Rational Constitutive Parameters
- Authors
- Ha, Sang-Gyu; Cho, Jeahoon; Kim, Eun-Ki; Park, Yong Bae; Jung, Kyung-Young
- Issue Date
- Sep-2015
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Dispersive media; finite-difference time-domain (FDTD) methods; numerical stability
- Citation
- IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, v.63, no.9, pp.4233 - 4238
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
- Volume
- 63
- Number
- 9
- Start Page
- 4233
- End Page
- 4238
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156482
- DOI
- 10.1109/TAP.2015.2452961
- ISSN
- 0018-926X
- Abstract
- In this work, we present a dispersive finite-difference time-domain (FDTD) algorithm using a four-pole complex rational function (CRF). For the sake of a better curve fitting of the four-pole CRF dispersion model, we use a particle swarm optimization technique. We also discuss an efficient memory storage strategy using a state-space approach. The numerical aspects of four-pole CRF-FDTD, the numerical accuracy and the numerical stability, are investigated in detail. Numerical examples are used to validate four-pole CRF-FDTD and numerical stability issues are discussed in detail. We also discuss the computational accuracy and the computational efficiency of an arbitrary N-pole CRF-FDTD.
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