Stirrer performance of reverberation chambers evaluated by time domain fidelity

The fidelity variation is considered inside a reverberation chamber. In particular, the scattering fidelity represents the decay law of the residual correlation between two cavity realizations. It is found that the fidelity is highly sensitive to stirrer geometry variations. Pertaining the chamber loading, the fidelity is also capable to reveal different location of absorbing materials. Results were also checked in terms of repeatability showing good reliability.