Differences in reverberation chamber insertion loss measurement in time & frequency domian

Abstract

Differences in the insertion loss of a reverberation chamber as measured in frequency & time domain are shown. And an alternative approach for measuring the insertion loss which is named as time domain energy-decay method is proposed, and compared with conventional time domain time-decay method & frequency domain continuous wave based method. Insertion loss measured by time domain energy-decay method is identical to that which would be obtained in frequency domain. The insertion loss determined by time-decay method is 1~2dB greater than those obtained with frequency domain measurement, the main reason for the discrepancy is the influence of antenna (antenna impedance mismatch and non-unit antenna efficiency). The effectiveness of the time domain method for measuring the insertion loss of a reverberation chamber is of particular interest in this paper.