Preliminary study of wireless power transmission for biomedical devices inside a human body

As a preliminary study, the technique wirelessly transferring electromagnetic energies to an implant device within a human body has been investigated. The wireless power transmission (WPT) technique using magnetically coupled resonances has been adapted to obtain high transmission efficiency. The transmission efficiency into the inside of a human body has been estimated for open-type and closed-type WPT systems. It has been shown that the closed-type WPT system has higher transmission efficiency than the open-type WPT system.