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. 2008 Jan 1;18(1):4-6.
doi: 10.1109/LMWC.2007.911970.

ADE-FDTD Scattered-Field Formulation for Dispersive Materials

Soon-Cheol Kong  1 , Jamesina J Simpson, Vadim Backman
Affiliations

ADE-FDTD Scattered-Field Formulation for Dispersive Materials

Soon-Cheol Kong et al. IEEE Microw Wirel Compon Lett. .

Abstract

This Letter presents a scattered-field formulation for modeling dispersive media using the finite-difference time-domain (FDTD) method. Specifically, the auxiliary differential equation method is applied to Drude and Lorentz media for a scattered field FDTD model. The present technique can also be applied in a straightforward manner to Debye media. Excellent agreement is achieved between the FDTD-calculated and exact theoretical results for the reflection coefficient in half-space problems.

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Figures

Fig. 1
Fig. 1
FDTD-calculated time-waveforms of the scattered (reflected) electric field for both the Drude and Lorentz half-space examples. The maximum Gaussian incident value is set to 1 V/m.
Fig. 2
Fig. 2
Comparison of FDTD and exact theoretical results from dc to 100 GHz for the magnitude of the reflection coefficient for both the Drude and Lorentz half-space examples.
See this image and copyright information in PMC

References

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