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Theses

Modélisation et simulation d'une chambre réverbérante à brassage de modes à l'aide de la méthode des différences finies dans le domaine temporel

Abstract : Since the last few years, the unprecedented growth of communication systems
involving the propagation of electromagnetic waves is particularly due to developments
in mobile phone technology. The reverberation chamber is a reliable bench-test, enabling
the study of the effects of electromagnetic waves on a specific electronic appliance.
However, the operating of a reverberation chamber being rather complicated, development
of numerical models are of utmost importance to determine the crucial parameters to be
considered.

This thesis consists in the modelling and the simulation of the operating
principles of a reverberation chamber by means of the Finite-Difference Time-Domain
method. After a brief study based on field and power measurements performed in a
reverberation chamber, the second chapter deals with the different problems encountered
during the modelling. The consideration of losses being a very important factor in the
operating of the chamber, two methods of implementation of these losses are set out in
this chapter. Chapter~3 consists in the analysis of the influence of the stirrer on the
first eigenmodes of the chamber; the latter modes can undergo a frequency shift of
several MHz. Chapter~4 shows a comparison of results issued from high frequency
simulations and theoretical statistical results. The problem of an object placed in the
chamber, resulting in a field disturbance is also tackled. Finally, in the fifth
chapter, a comparison of statistical results for stirrers having different shapes is set
out.
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Theses
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https://tel.archives-ouvertes.fr/tel-00003238
Contributor : Frédéric Petit <>
Submitted on : Wednesday, August 6, 2003 - 4:56:02 PM
Last modification on : Tuesday, June 2, 2020 - 7:36:03 AM
Long-term archiving on: : Tuesday, September 11, 2012 - 9:25:30 PM

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  • HAL Id : tel-00003238, version 1

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Frédéric Petit. Modélisation et simulation d'une chambre réverbérante à brassage de modes à l'aide de la méthode des différences finies dans le domaine temporel. Modélisation et simulation. Université de Marne la Vallée, 2002. Français. ⟨tel-00003238⟩

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