Powering implantable telemetry devices from localized magnetic fields

Annu Int Conf IEEE Eng Med Biol Soc. 2007:2007:2331-5. doi: 10.1109/IEMBS.2007.4352793.

Abstract

This paper presents a novel method of inductively powering an implantable telemetry device over a large area. The system is based around an array of individually tuned series resonant circuits distributed across a charging pad. By varying the frequency of the driving voltage, the location of the charging field is changed. Presented are a method of controlling the resonant frequency and techniques for determining the geometry of the charging pad. Results from a nine coil system operating between 97 kHz and 209 kHz are given which can deliver 100 mW to an implanted telemeter at a height of 5cm above the charging pad.

MeSH terms

  • Algorithms
  • Animals
  • Computers
  • Electric Power Supplies*
  • Electrodes, Implanted*
  • Electromagnetic Fields
  • Equipment Design
  • Humans
  • Magnetics*
  • Mice
  • Models, Statistical
  • Monitoring, Ambulatory / instrumentation*
  • Monitoring, Ambulatory / methods
  • Prostheses and Implants
  • Reproducibility of Results
  • Telemetry / instrumentation*
  • Telemetry / methods