Impact of a Large Enclosure on Reverberation Chambers: A Full-Wave Simulation Study

This work presents a preliminary full-wave simulation analysis of a reverberation chamber (RC) loaded with a large enclosure that includes an aperture and internal lossy materials. The study investigates how the presence of a large structure and changes in its aperture size and internal absorbers affect key chamber characteristics such as the Rician K-factor, the scattering parameter S21, and the Quality (Q) factor. A 1.5 mx1.2mx1m metallic structure is modeled inside a large RC using the finite-difference time-domain method. Results for this configuration indicate that due to the presence of the metallic structure, the K-factor exhibits narrowband frequency spikes, whereas changes in the S21 and the Q-factor are more consistent across the analyzed frequency range. These preliminary findings will be extended in future work to include additional enclosure geometries, a wider range of aperture configurations, and experimental validation.