A compact resonace-based wireless energy transfer system for implanted electronic devices

A compact wireless energy transfer scheme for delivering power to the implantable electronic devices has been presented here. The wireless energy transfer system is built by using a printed spiral receiving resonator with a cylindrical source resonator to transfer energy wirelessly through strongly coupled magnetic resonance. Experimentally, it is found that the wireless power transfer efficiency reaches the maximum at the resonant frequency, and the efficiency decreases with the increase of the distance between the source and receiver coils. The proposed design has the significant advantage of being easier to implement for biomedical applications due to sizeable reduction in volume required on the implantable devices.