PREDICTION OF THE SAR LEVEL INDUCED IN A DIELECTRIC SPHERE BY A THIN WIRE DIPOLE ANTENNA

Abstract

The interaction between a dipole antenna, representing a simplified model of a mobile terminal, and a homogeneous spherical model of the human head is examined. The Finite Difference Time Domain (FDTD) method is utilized, to calculate the either peak or average value of the Specific Absorption Rate (SAR), corresponding to different distances between antenna and phantom. The variation of the SAR with the distance between the mobile antenna and the human phantom has gained significant attention in the recent literature and is investigated here. An attempt to correlate the computed SAR values with the basic antenna characteristics, such as the standing wave ratio (SWR), reveals that a precise estimation of the level of the SAR can be achieved regarding data acquired from the mobile terminal.