Abstract
This paper presents the development of an energy harvesting circuit for use with a head-mountable deep brain stimulation (DBS) device. It consists of a circular planar inverted-F antenna (PIFA) and a Schottky diode-based Cockcroft-Walton 4-voltage rectifier. The PIFA has the volume of π × 102 × 1.5 mm3, resonance frequency of 915 MHz, and bandwidth of 16 MHz (909-925 MHz) at a return loss of -10 dB. The rectifier offers maximum efficiency of 78% for the input power of -5 dBm at a 5 kΩ load resistance. The developed rectenna operates efficiently at 915 MHz for the input power within -15 dBm to +5 dBm. For operating a DBS device, the DC voltage of 2 V is recorded from the rectenna terminal at a distance of 55 cm away from a 26.77 dBm transmitter in free space. An in-vitro test of the DBS device is presented.
Original language | English (US) |
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Pages (from-to) | 1020-1026 |
Number of pages | 7 |
Journal | Medical Engineering and Physics |
Volume | 37 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2015 |
Keywords
- Deep brain stimulation
- Radio frequency energy harvesting
- Rectenna
ASJC Scopus subject areas
- Biophysics
- Biomedical Engineering