On the uncertainty in numerical modeling of wireless communication devices operating at frequencies of 900 MHz, 1800 MHz, and 28 GHz.

This article focuses on the impact of modeling uncertainties on dosimetric evaluations of wireless communication devices operating at 900 MHz, 1800 MHz, and 28 GHz frequencies. It investigates how factors such as dielectric losses, antenna detuning, and mesh resolution affect peak spatial average specific absorption rate (psSAR) and peak spatial average power density (psPD) using Computer Aided Design (CAD) models of various wireless devices, including 5G phones. The study finds that normalizing dosimetric results to the radiated power rather than the antenna feedpoint current or accepted feedpoint power significantly reduces uncertainties caused by these modeling parameters. These findings support existing computational standards recommending normalization to radiated power for more robust and consistent numerical dosimetric assessments of wireless devices.