Rayleigh propagation environment simulation in iDEN reverberation chamber. power delay profile and uniformity implications

This paper presents an analysis of the propagation environment simulated in a medium size reverberation chamber (3.4*3*2.4 m). Power delay profiles are measured in a 200 MHz bandwidth from 1900 MHz to 2100 MHz with different loading conditions. The general goal is to assess the ability of simulating Rayleigh propagation channels with different delay spreads and monitoring uniformity degradation with loading. The delay spread in a reverberation chamber without intentional loading is long due to the fact that the reflected rays arrive with significant energy after several reflections. The use of absorbers is necessary to reduce the delay spread which is critical to test wideband systems but, the addition of absorbers degrades uniformity. In addition to this time variant behavior is also analyzed.