Implementation of FDTD scheme using PML for truncation of the head model in cellular phone simulations

This paper presents the implementation of FDTD scheme using perfectly matched layer (PML) for truncation of head model in cellular telephone simulations. The simulated physical domain containing a dipole antenna and a head model is truncated with a PML as an absorbing medium. The outstanding feature of the proposed formulation is the combination of a physical domain and an This paper presents an implementation of FDTD scheme absorbing layer as a single computational domain with spatially varying permittivity and permeability values. By using this single domain concept, it is possible to considerably reduce the size of the FDTD computational space to be considered in the computer simulation, which resulted in saving both computer time and storage memory. The calculated parameter from the simulation is the specific absorption rate (SAR) which is obtained 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.