SAR mapping within the human eye due to portable transceivers

摘要

The electromagnetic field and induced specific absorption rate (SAR) within a detailed model of the human eye are calculated for different cellular telephony frequencies (840, 915, 1500 and 1800 MHz) at the ANSI uncontrolled environment exclusion distance of 25 mm and closer. The computations are performed with the finite-difference time domain method (FDTD) and the heating potential, derived from electric field values, is used to calculate the temperature distribution induced within the model. The computations are performed with the implicit alternating-direction (IAD) algorithm for the heat conduction equation. It is shown that, for short distances and for the higher frequencies of interest, substantial temperature elevation can occur close to the center of the eyeball.