Effect of Chamber Loading in Reverberation Chamber Testing

In the shift to reverberation testing for automotive radiated immunity, ISO 11452-11:2010 suggests chamber loading factor, $F C L F=1$ if the average received power matches values from empty chamber characterization. However, our study finds that with large Device Under Test (DUT) even when this criterion is met, it is essential to evaluate and include FCLF for forward power calculation which otherwise would result in significant forward power discrepancies leading to under-testing