A Modified Wireless Power Transfer System for Medical Implants

Abstract

Wireless Power Transfer (WPT) is a promising technique, yet still an experimental solution, to replace batteries in existing implants and overcome the related health complications. However, not all techniques are adequate to meet the safety requirements of medical implants for patients. Ensuring a compromise between a small form factor and a high Power Transfer Efficiency (PTE) for transcutaneous applications still remains a challenge. In this work, we have used a resonant inductive coupling for WPT and a coil geometry optimization approach to address constraints related to maintaining a small form factor and the efficiency of power transfer. Thus, we propose a WPT system for medical implants operating at 13.56 MHz using high-efficiency Complementary Metal Oxide-Semiconductor (CMOS) components and an optimized Printed Circuit Coil (PCC). It is divided into two main circuits, a transmitter circuit located outside the human body and a receiver circuit implanted inside the body. The transmitter circuit was designed with an oscillator, driver and a Class-E power amplifier. Experimental results acquired in the air medium show that the proposed system reaches a power transfer efficiency of 75.1% for 0.5 cm and reaches 5 cm as a maximum transfer distance for 10.67% of the efficiency, all of which holds promise for implementing WPT for medical implants that don’t require further medical intervention, and without taking up a lot of space.

Matrix Metamaterial Shielding Design for Wireless Power Transfer to Control the Magnetic Field

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Design and Implementation of High Performance PPSK demodulator in Biomedical Implant

“…Many wireless medical implants [1] are speci cally used for prosthesis and diagnosis, functioned to mimic as regular body parts. In the eld of Pharmacy, designing of these implants requires miniaturization of technology & also component scaling.…”

Design and Implementation of High Performance PPSK demodulator in Biomedical Implant

“…Many wireless medical implants (1) are specifically used for prosthesis and diagnosis, functioned to mimic regular body parts. In the field of Pharmacy, designing these implants requires miniaturization of technology & also component scaling.…”