A General Framework for the Finite-Difference Time-Domain Simulation of Real Metals

Author

Pernice, Wolfram H P ; Payne, Frank P. ; Gallagher, Dominic F G

Author_Institution

Dept. of Eng. Sci., Oxford Univ.

Volume

55

Issue

3

fYear

2007

fDate

3/1/2007 12:00:00 AM

Firstpage

916

Lastpage

923

Abstract

We present an efficient framework for the finite-difference time-domain simulation of real metals. The complex permittivity function of a metal is fitted to experimental data in the frequency domain using a non-linear least squares algorithm. A memory-efficient finite-difference time-domain (FDTD) scheme is presented for the simulation of the dispersive behavior of a metal in the frequency domain. The stability limit for the proposed scheme is determined and compared to the Courant limit. Excellent agreement between our FDTD formulation and the analytical solution for reflections from a thin metal sheet is found

Keywords

dispersive media; electromagnetic fields; finite difference time-domain analysis; least squares approximations; numerical stability; permittivity; FDTD scheme; dispersive behavior; finite-difference time-domain simulation; nonlinear least squares algorithm; permittivity function; real metal; stability; Differential equations; Dispersion; Finite difference methods; Frequency dependence; Frequency domain analysis; Magnetic materials; Maxwell equations; Permittivity; Polarization; Time domain analysis; Dispersive media; finite-difference time-domain (FDTD) methods; numerical stability;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2007.891853

Filename

4120293