Wireless power transfer to deep-tissue mm-size implants using wireless repeater node

This paper proposes a biomedical RFID system meant for wireless interrogation of deep-tissue mm-size implant sensors. The communication system is based on using a repeater device that amplifies the attenuated downlink power and thus extends sensor read distance. This system enables monitoring of different body organs by placing miniature sensor implants inside them. The repeater device should also be implanted in the wireless power path from external reader to the sensor implant in a safe place not disturbing any body functions.