Localized Specific Absorption Rate in the Human Head in Metal-Framed Spectacles for 1.5 GHz Hand-Held Mobile Telephones

Abstract

Enhancements of the localized specific absorption rate (SAR) caused by metal-framed spectacles are analyzed numerically for 1.5 GHz hand-held mobile telephones. The finite-difference time-domain (FDTD) method and an anatomically based human head model are employed in the analysis. Enhancements of up to 1.2 times for the ten-gram-averaged spatial peak SAR in the head and of up to 2.75 times for the one-gram-averaged SAR in the eye are found, whereas there is no significant variation of the absorbed power or averaged SAR in the whole head. The mechanism of localized SAR enhancement is clarified to be due to an induced current on the metal frame. (17 References).