Simulation of Human Body Exposure to High and Low Frequency Wireless Power Transfer Systems using Simplified Models

In this paper, human body exposure to LF and HF electromagnetic field is analyzed. Antennas and wireless power transfer (WPT) systems are numerically modelled using commercial software FEKO. The analysis is carried out for two simplified models of human body (parallelepiped and cylinder model) exposed to radiation in terms of power transfer efficiency (PTE) and specific absorption rate (SAR)) at frequencies of 13.56 MHz, 6.78 MHz and 100 kHz. It is shown that the SAR in simplified human body model does not exceed the reference limit values prescribed by international guidelines. Used simplified models are validated by comparison with realistic human body model results at 13.56 MHz from literature.