A simplified model of specific absorption rate calculation for laptop-mounted equipment in near proximity to human torso

摘要

A simplified model of specific absorption rate (SAR) calculation is proposed for laptop-mounted equipments in proximity to human torso, in which the equivalent models of liquid phantom and laptop are investigated and studied. By improving the liquid phantom based on transmission-line theory and perfect matching layer (PML), this proposed model can improve the simulation efficiency by at least 40% while the error is within 3%. Furthermore, the effects of laptop's geometric and electric parameters on SAR are also evaluated combined with the phantom. The accuracy and efficiency of the simplified model are validated by calculating the SAR distribution of three kinds of practical data cards and comparing SEMCAD results with the measurement ones.