Conformal FDTD Simulation of Vibrating Intrinsic Reverberation Chambers

Abstract

We introduce a novel simulation procedure devoted to the inner field evaluation of arbitrary-shape reverberation chambers especially well-suited for the analysis of Vibrating Intrinsic Reverberation Chambers (VIRC). The described method is based on conformal Finite-Difference in Time-Domain (FDTD) modeling to account for the rough surface geometry of the VIRC walls. On this point, we took full advantage of the meshing capability of the in-house numerical code TEMSI developped by XLIM. Performance criteria typically introduced to evaluate the overall efficiency of conventional reverberation chambers (RC) are extracted from the computed S 11 of a log-periodic antenna meshed within the under-study resonant cavity. Numerical outcomes demonstrate excellent agreement with experimental results in similar conditions.

Simulation of Vibrating Intrinsic Reverberation Chambers Using an FDTD Conformal Mesh

“…In this article (which is an extension of [15]), we are presenting the process we have implemented in order to simulate a VIRC with the FDTD method using for the first time (to the best of our knowledge) a conformal mesh [16], [17] in order to model a realistic VIRC geometry. Moreover, in order to reproduce as faithfully as possible a real experimental setup implemented in VIRC, the antenna considered in the simulations is a log-periodic one, an antenna typically used in RC.…”