Exposure of the palm to handheld wireless devices operating at frequencies from 900 MHz to 6 GHz.

The exposure of the palm due to handheld wireless devices is analyzed using anatomical hand models of adults and children considering a frequency range from 900 MHz to 6000 MHz. The fingers of the hand models are articulated such that they hold the phone model in realistic positions. The antennas of the phone model are located in the microphone region, which maximizes the exposure of the palm. Approximately 140 configurations are evaluated numerically. The exposure is quantified in terms of the 10 g psSAR and compared with the psSAR calculated for a flat phantom. The results indicate that the exposure of the palm is within the extremity exposure limit of 4 W per kg in ~96% of the cases for the hand models if the exposure limits are met for a flat phantom at 0 mm distance. The numerical uncertainty for the exposure evaluation is assessed as 24.7% ($k=2$).