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Modeling dispersive dielectrics for the 2-D TLM method

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5 Author(s)
Barba, I. ; Dept. de Electr. y Electron., Valladolid Univ., Spain ; Cabeceira, A.C.L. ; Represa, J. ; Panizo, M.
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The transition line matrix (TLM) method, since it is a time-domain method, cannot deal directly with dispersive media. We propose a way for modeling such media, starting from the causality relationship between field vectors D and E, which is discretized over the same space-time mesh as the two-dimensional TLM mesh. This leads to adding a voltage source at each node, its value depending on the previous instants. The method is validated by computing the reflection coefficient at an air-water interface and the cutoff frequencies of a rectangular waveguide containing a Debye dielectric

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:6 ,  Issue: 4 )

Date of Publication:

Apr 1996

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