Integrated Resonant Structure for Simultaneous Wireless Power Transfer and Data Telemetry

Abstract

Novel miniaturized transmitting (TX) and receiving (RX) wireless power transfer (WPT) resonators operating at 6.78 MHz integrated with an antenna for the Medical Implant Communication Service (MICS) band (402-405 MHz) are devised and presented. Parametric analysis and matching circuits of the integrated basket-weave shaped resonator topology are discussed. WPT and antenna radiation efficiencies are analyzed and optimized using a finite element method numerical solver. The prototype model is fabricated and tested in vitro, using human-body phantom mimicking electrical properties of the human body tissues. The power transfer efficiency (PTE) of 35% at 20 mm distance and implanted antenna gain of -23 dBi are confirmed via simulations and measurements.