Variability of whole-body average SAR in human models for far-field exposures

The present study proposed an equation for estimating the WBSAR in human body models for plane-wave exposure at whole-body resonance frequency. The necessity of the present study was that the WBSAR becomes maximal at that frequency and is close to the basic restriction in international guidelines for human protection. Therefore, our attention was focused on the variability of WBSAR in different human body models. An equation for estimating the WBSAR at the resonance frequency was proposed on the basis of an analogy to an antenna. The feature of this equation was that the WBSAR can be estimated with the BMI of the human body only for a given incident power density. The variability of the WBSAR with the equation due to the body shape or BMI was found to be 30%, even for humans of the same age.