SAR assessment of a human body exposed to electromagnetic fields from a wireless power transfer system in 10 MHz band

Wireless power transfer (W PT) technology has attracted great attention for its high transfer efficiency with a long transfer range. Concerning biological hazards caused by strong electromagnetic fields in proximity to the WPT system, the dosimetry of the WPT system needs to be investigated in detail. In this paper, exposure assessment of the WPT system with a homogeneous cylinder in various operating situations possible was performed to characterize the dosimetry. It was found that the maximum allowable input power of the WPT system is restricted based on the whole-body average specific absorption rate (SAR) rather than the peak 10g-average SAR for some exposure conditions. Finally, a hybrid MoM/FDTD method is us ed to calculate the induced electric field inside the realistic human body and maximum allowable power into the WPT system.