Mod\'elisation de la propagation dans une structure ferm\'ee surdimensionn\'ee

TL;DR

This paper models electromagnetic wave propagation in large closed structures with dimensions much larger than the wavelength, exploring continuous and pulsed excitation methods for various applications.

Contribution

It introduces models for electromagnetic wave propagation in oversized closed structures, analyzing two excitation methods and their applications.

Findings

Models successfully describe wave behavior in large structures.

Resonant modes enable material characterization.

Pulsed excitation offers additional measurement insights.

Abstract

The propagation of an electromagnetic wave in closed structures led to numerous applications ranging from the characterization of materials in resonating cavities to the measurements using pregnant reverberant EMF. We created models to study the existence of electromagnetic waves in large closed structures. There are two ways of excitation in such structures. One of these methods is based on continuous excitation with specific resonant modes, which has a variety of applications. The second method consists of a pulsed excitation similar to the impulse wave radar. This excitation provides other information. The structures studied were closed by perfectly conducting walls and the electromagnetic wave was generated in the structure using dipole antennas. The dimensions (length, width and height) were always much larger than the wavelength.