SAR evaluation using human-equivalent liquid phantom in wireless power transfer frequency band

In order to evaluate specific absorption rate (SAR) of human exposure in vicinity of wireless power transfer (WPT) devices operating in intermediate-frequency band, we have developed a human-equivalent dielectric liquid phantom using a diluted solution with the 0.04 mol/l concentrations. The liquid phantom has the same conductivity and indicates similar EM characteristics with two-third of the muscle. We demonstrate that conductivity of the solution is a main factor of determining EM characteristics in the WPT frequency band. Finally, we perform numerical investigation on EM characteristics derived from using a simple-shape phantom.