Wireless power transfer in the presence of a conducting interface: An analytical solution

A combined electromagnetic-circuit model of wireless power transfer (WPT) between a pair of inductively coupled loop resonators in the presence of a conducting slab is developed. The model takes into account all electromagnetic interactions occurring between the coils and the slab. The proposed analytical model is particularly relevant to applications in the field of wireless charging of electric vehicles and WPT to feed implanted medical devices and body sensor networks for health-care and medical research, where it can be instrumental for optimizing transfer efficiency, power regulation, and assessment of compliance of WPT systems to human electromagnetic exposure limits.