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

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) s...

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Veröffentlicht in:	IEEE transactions on antennas and propagation 2007-03, Vol.55 (3), p.916-923
Hauptverfasser:	Pernice, W.H.P., Payne, F.P., Gallagher, D.F.G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Applied classical electromagnetism Computer simulation Differential equations Dispersion Dispersive media Electromagnetic wave propagation, radiowave propagation Electromagnetism electron and ion optics Exact sciences and technology Finite difference method Finite difference methods Finite difference time domain method finite-difference time-domain (FDTD) methods Frequency dependence Frequency domain analysis Frequency domains Fundamental areas of phenomenology (including applications) Least squares method Magnetic materials Mathematical analysis Maxwell equations numerical stability Permittivity Physics Polarization Reflection Time domain analysis
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Beschreibung
Zusammenfassung:	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
ISSN:	0018-926X 1558-2221
DOI:	10.1109/TAP.2007.891853