Incident Electric Field Effect and Numerical Dosimetry for a Wireless Power Transfer System Using Magnetically Coupled Resonances

We conducted a dosimetry study of a wireless power transfer (WPT) system, which is based on magnetically coupled resonances. The electric and magnetic fields produced by the system have been calculated using the method of moments. We calculated the induced electric fields and the specific absorption rates in a Japanese adult male model by the scattered-field finite-difference time-domain method, taking into account both the incident electric and magnetic fields, and also by the impedance method, but only taking into account the incident magnetic fields. We discuss the differences between the results obtained by the two methods. We also discuss the compliance of the WPT system with international safety guidelines.