Experimental evaluation of the conversion of emission results obtained from a Reverberation Chamber measurement and a SAR measurement

Abstract

The reverberation chamber (RC) method has many advantages above the semi anechoic room (SAR) method. The RC method is specifically useful to measure emissions at high frequencies (>1 GHz). This is an important property when we consider the trend of increasing operating frequencies of products and wireless applications. Furthermore, the RC method is useful for immunity tests, where we only need moderate power for generating suitable test levels. However, when different methods are used, the topic of conversion arises. In this paper, we specifically consider practical evaluation of the conversion factor of emission results of a CISPR 22 system-test EUT configuration. In addition, we investigate the practical conversion factor of an artificial EUT. From these evaluations, it could be concluded that the RC method is suitable for performing compliance emission measurements and that a conversion factor of around 4 dB is applicable.