Variability of SAR in different human models due to wireless power transfer with magnetic resonance

The present study discusses the specific absorption rate (SAR) due to magnetic fields of a wireless power transfer system in the 10 MHz frequency band. Multigrid method is implemented in the quasi-static electromagnetic analysis of induced electric field in the human body to reduce the computational time to investigate the variability of SAR in different exposure scenarios. The computational time and convergence is also discussed. From our computational results, the computational time was approximately 300 times faster than that with the conventional method. Using our quasi-static approach, the SAR was computed in different anatomically based human models and for different exposure scenarios. The peak SAR values appeared when the human body was located in front of either of the coils, with the height of the coil in front of the chest. The peak SAR values are thought to be affected by variations in the cross-section area of anatomically based models considered.