Evaluation of SARs in a human-body model due to smart-watch wearable device

In this study, we investigate the SAR of the smart-watch wearable device with a planar inverted F antenna. Currently, the standards for compliance testing of limb-worn devices specifics the use of a flat phantom to provide conservative estimates of SAR. This means that SAR estimated by using a flat phantom should be higher than the SAR in real exposure scenario. In order to verify this, SARs for standard flat phantoms are calculated and compared with those calculated for anatomical human-body models. The smart-watch model produce higher SARs in human-body models than in flat phantom. We determine the different phantom dimension, shape, and tissue structure are the reason for difference in spatial peak SAR results between human-body model and flat phantom.