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  • Title: Radio frequency energy harvesting from a feeding source in a passive deep brain stimulation device for murine preclinical research.
    Author: Hosain MK, Kouzani AZ, Tye SJ, Samad MF, Kale RP, Bennet KE, Manciu FS, Berk M.
    Journal: Med Eng Phys; 2015 Oct; 37(10):1020-6. PubMed ID: 26318799.
    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 × 10(2) × 1.5 mm(3), 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.
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