Truncation of the head model in cellular phone simulations using a simple PML formulation

This work presents a simple artificial absorbing layer for truncation of head model in cellular telephone simulations.. The physical domain containing an antenna and a head model is truncated with an absorbing layer. The simulation combines the physical domain and an absorbing layer as a single computational domain with spatially varying permittivity values. The specific absorption rate (SAR) distribution is calculated using the finite-difference time-domain (FDTD) scheme with a realistic head model and a realistic antenna model. An antenna operated at 900 MHz and 1800 MHz is simulated at various distances from a head model. The local SAR was computed within each finite difference cube. The spatial-peak 1- and 10-g average SARs were computed for each cubic volume that satisfies the mass constraints over the entire region. Also, the dependence of the maximum local SAR on the distance between an antenna and a head model is evaluated.