IMMUNITY TEST SIMULATION IN A MULTIPLE ANTENNA SOURCE STIRRED REVERBERATION CHAMBER

Multiple antenna source stirring is an alternative technique to realize a reverberation chamber: in the proposed case, 62 monopoles are distributed on the chamber walls and fed two at time, so achieving 1891 combinations. The electromagnetic field distribution and the self and mutual impedances are analytically determinable, and statistics can be predicted through the computation of Cumulative Distribution Functions and Polar Plots. The model can be also extended to simulate an immunity test by inserting a DUT inside the working volume of the chamber. Both a monopole and a loop are analytically modeled to simulate common and differential mode noise. It must be highlighted that all mutual coupling among the transmitting antennas and the DUT are accounted for, in terms of mutual impedances. In the lower frequency range, undermoded condition, the technique takes benefit from the adoption of an out-of-phase feeding of each active couple of antennas that enhances field strength