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Comptes Rendus Physique
Volume 10, n° 1
pages 65-69 (janvier 2009)
Doi : 10.1016/j.crhy.2009.02.003
The reciprocity theorem applied to finding the best coupling incidence
Recherche de la direction d’incidence de plus fort couplage à l’aide du théorème de réciprocité
 

Jean-Pierre Adam a, , Jean-Christophe Joly b, Bernard Pecqueux b, Didier Asfaux a
a IEEA, 13, promenade Paul-Doumer, 92400 Courbevoie, France 
b Centre d’études de Gramat, DGA/DET/CEG, 46500 Gramat, France 

Corresponding author.
Abstract

This document presents an application of the electromagnetism reciprocity theorem in the time domain. The far field radiated by a system in a given direction is used to evaluate the effect of an incident plane wave coming from that direction. The useful formulas are derived for a current source and a voltage source. These results are applied with the FDTD software Gorf3D. A single run with a system radiating in N directions enables to predict the result of N runs with a system illuminated by a plane wave. Application examples are used to estimate the computation time gain. To cite this article: J.-P. Adam et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.
Résumé

Ce document présente une application du théorème de réciprocité en électromagnétisme dans le domaine temporel. La forme temporelle du champ rayonné par un système dans une direction est utilisée pour déterminer l’effet d’une onde plane provenant de cette direction. Les relations utiles sont montrées pour une source de courant et une source de tension. Ces résultats sont mis en œuvre à l’aide du code DFDT Gorf3D. Un seul cas de calcul détermine le champ rayonné dans N directions et permet de remplacer N cas de calcul avec une onde plane incidente. Des applications illustrent la méthode et permettent d’estimer le gain de temps de calcul. Pour citer cet article : J.-P. Adam et al., C. R. Physique 10 (2009).

The full text of this article is available in PDF format.

Keywords : Reciprocity theorem, Time domain, FDTD

Mots-clés : Théorème de réciprocité, Domaine temporel, DFDT




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