FDTD analysis of the field penetration through lossy materials in a reverberation chamber

This paper presents an electromagnetic analysis of lossy materials with a reverberation chamber (RC) and a case inside it. The geometrical structure is modeled with a multistructural FDTD technique. The domain of the RC is simulated with the classical Hill’s plane wave representation, the material domain is followed by an array of monodimensional FDTD and the case domain is made with the perfect electric conductor (PEC). Physically, the material is placed above an electrically large aperture of the case, that couples considered environments. Thanks to the high conductivity of the material, it is possible to separate numerical domains: only the material lattice is subordinate to the cell contraction. Numerical results are validated with the Fresnel theory and compared with experimental measurements.