Evaluation of EM absorption characteristics in realistic adult and child models in vicinity of wireless power transfer systems

There are public concerns about biological hazards caused by strong electromagnetic near-fields produced by WPT systems. In particular, absorbed power averaged over mass and the specific absorption rates (SARs) in a child model tend to show a higher value than those in adults. In this paper, we investigate numerical exposures of adult and child models in proximity of a WPT system in 7 MHz bands. We then compare the dosimetry results with the levels prescribed in the ICNIRP guidelines to find the maximum allowable input power of the system. Finally, we found that the exposures of human models in vicinity of the WPT system is highly localized, where the peak 10g average SAR is higher than the whole-body average SAR in all exposure scenarios in this study.