Accuracy in Reverberation Chamber for wireless testing: Simple formulas for the number of independent samples

The growing use of the reverberation chamber (RC) for wireless applications calls for methods of evaluating RC measurement accuracy. Focus is turning towards improved understanding of the processes that influence accuracy of measurements in a RC when different stirring techniques are employed. Measurement accuracy relies on the number of independent samples in measurement sequences. This paper presents simple formulas for the number of independent samples in RC measurements when different stirring techniques are employed. The theoretical model has been experimentally validated. The proposed formula is very simple and provides an understanding of the physical and electromagnetic processes involved in RC measurements. Moreover, it is general and should be applicable also to other reverberation chambers if similar stirring methods are used.