No abstract

No abstract

In this paper, we propose a new 3D conservative FDTD(2,4) scheme exhibiting properties close to the 2D-M24 scheme. This scheme is designed to retain a two dimensional stencil in the field update equations and has high-phase accuracy at low-grid resolutions. Moreover, an accurate Courant-Friedrichs-Lewy (CFL) condition has been validated for this scheme. Some experiments are conducted to assess the higher accuracy of the proposed scheme.

This article presents an original simulation procedure devoted to the simulation of arbitrary-shaped reverberation chambers especially well suited for the analysis of vibrating intrinsic reverberation chambers (VIRC). The described method is based upon conformal finite-difference in time-domain (FDTD) modeling in order to model the rough surface geometry of the VIRC walls. On this point, we take full advantage of the performance of our in-house numerical FDTD code called TEMSI-FD and of its associated conformal mesher. First, uncorrelated geometries of the VIRC under study have been generated in order to analyze its performance as a RC from the computed S 11 parameter of a log-periodic antenna. Second, correlated geometries have been generated in order to consider the continuous movement of the VIRC walls with a straightforward algorithm, each geometry being associated to a given instant. In both frequency and time domains, numerical outcomes demonstrate excellent agreement with experimental results available in the literature in similar conditions.

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.