Wireless power transfer system design for implanted and worn devices

Abstract

Witricity, a highly efficient wireless power transfer method using mid-range resonant coupling, was reported in recent literature. Based on this method, we present a wireless power transfer scheme using thin film resonant cells for medical applications. The thin film cells, consisting of a tape coil in the exterior layer and conductive strips in the interior layer separated by an insulation layer, are made light and flexible to provide comfort for users during wear. The wireless power transfer scheme presented displays great potential for delivering energy to implantable and worn devices, with range much larger than the current technology for powering implantable devices.