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Surface impedance boundary conditions at oblique incidence in FDTD

Formalisme D’impédance de Surface en Incidence Oblique: Application à la Méthode aux Différences Finies Transitoires

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Abstract

Surface impedance formalism permits to reduce the discretization volume in a finite difference time domain (FDTD) code. The method based on the definition of surface impedances for plane waves at horizontal or vertical polarizations, is introduced in fdtd algorithm, to model interfaces between two media. In this paper, two dimensional and three dimensional results are compared to those computed with classical fdtd or Fresnel reflection coefficients involving a Fourier transform.

Résumé

Le formalisme ďimpédance de surface dans la modélisation ďinterfaces permet de réduire le volume discrétisé dans les logiciels de différences finies dans le domaine temporel (dfdt). La méthode basée sur la définition ďimpédances de surface pour des ondes planes en polarisation horizontale ou verticale, à partir des facteurs de réflexion de Fresnel, permet ďintroduire le concept dans un algorithme dfdt. Dans cet article, différents cas traités, en deux ou trois dimensions, sont validés par les résultats des méthodes des facteurs de réflexion de Fresnel et des différences finies classiques.

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Authors and Affiliations

  1. IRCOM, Equipe Electromagnétisme, Faculté des Sciences, URA au CNRS n° 356, 123, rue Albert-Thomas, F-87060, Limoges Cedex

    Salah Kellali, Bernard Jecko & Alain Reineix

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  1. Salah Kellali
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  2. Bernard Jecko
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  3. Alain Reineix
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Kellali, S., Jecko, B. & Reineix, A. Surface impedance boundary conditions at oblique incidence in FDTD. Ann. Télécommun. 48, 268–276 (1993). https://doi.org/10.1007/BF02995735

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  • DOI: https://doi.org/10.1007/BF02995735

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