Two approaches for determining the whole-body average SAR in a reverberation chamber

This paper aims to perform a comparison study of two approaches, two-step hybrid method and S-parameter measurement method, for determining the whole-body average-specific absorption rate (WBA-SAR) for rats in a reverberation chamber (RC). The two-step hybrid method incorporates finite-difference time-domain (FDTD) numerical solutions with electric field measurements in a RC-type exposure system; S-parameter measurement method is a totally experimental evaluation method to estimate the WBA-SAR in an RC. We first compare the WBA-SAR results derived in two rat-equivalent phantoms, then investigate the influence of measurement error on the relative error of WBA-SAR to clarify the validity and accuracy of these two approaches.