Reverberating Chambers for EMC Measurements

A brief review of the theory of operation of reverberating chambers is given along with several tests of the theory. The probabilistic model of the power received from a radiating device under tests in the chamber is often taken to be an exponential probability density function. The received power in a non-ideal chamber is shown to be described by a probability density function which reduces to the exponential distribution as the chamber more effectively randomizes the interior fields. The probability density function of the received signal's phase is shown to be a sensitive test of chamber optimization. Experiments are reported which quantify the effect of a reverberating chamber on a device under test.