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Une méthode ďétude des lignes de transmission dans un milieu non homogène multicouche en présence ďun champ électromagnétique externe

A method of studying transmission lines in a multilayered inhomogeneous medium in the presence of an external electromagnetic field

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Résumé

Dans cet article, nous proposons une nouvelle méthode temporelle simple de simulation de couplage entre une onde électromagnétique plane externe et une ligne de transmission planaire dans un milieu non homogène multicouche. Elle est basée sur les équations des télégraphistes modifiées. Ľoriginalité de cette approche réside dans le fait que le calcul des sources distribuées tient compte du champ électromagnétique dans chaque couche diélectrique. La technique de calcul du champ dans les différents milieux repose sur le concept de ľoptique physique. Ľalgorithme de résolution des équations de lignes est celui des différences finies à points centrés (FDTD). La confrontation des résultats de cette approche avec ďautres résultats théoriques et expérimentaux atteste ďun bon accord et valide la procédure proposée de simulation. Il est aussi montré que les méthodes qui négligent la non-homogénéité aboutissent généralement à des résultats erronés.

Abstract

A new simple time-domain method for simulating the coupling between an electromagnetic plane wave and a planar transmission line in a multilayered inhomogeneous medium is proposed. The approach is based upon the modified telegrapher’s equations. The originality of this approach comes from the fact that the calculation of the distributed sources takes into account the electromagnetic field in each layer. The calculation of this field in the multilayered medium is performed by means of the physical optic concept. A finite difference time domain (FDTD) algorithm is used to solve the transmission line equations. The comparison between our results and other theoretical and measured results validates the proposed simulation approach. It has also been demonstrated that neglecting the effect of inhomogeneous medium results in erroneous simulations.

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Authors and Affiliations

  1. Département de Physique, Faculté des Sciences et Techniques Fès Saiss, Route ďImouzzer, BP. 2202, Fès- Maroc

    D. Tahri & N. Elouazzani

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  1. D. Tahri
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  2. N. Elouazzani
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Correspondence to N. Elouazzani.

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Tahri, D., Elouazzani, N. Une méthode ďétude des lignes de transmission dans un milieu non homogène multicouche en présence ďun champ électromagnétique externe. Ann. Télécommun. 56, 215–223 (2001). https://doi.org/10.1007/BF03002704

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  • DOI: https://doi.org/10.1007/BF03002704

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