FDTD Dispersive Modeling With High-Order Rational Constitutive Parameters

作者：Ha Sang Gyu^*; Cho Jeahoon; Kim Eun Ki; Park Yong Bae; Jung Kyung Young

来源：IEEE Transactions on Antennas and Propagation, 2015, 63(9): 4233-4238.

DOI：10.1109/TAP.2015.2452961

• Dispersive media
• finite-difference time-domain (FDTD) methods
• numerical stability

In this work, we present a dispersive finite-difference time-domain (FDTD) algorithm using a four-pole complex rational 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.

• 出版日期2015-9