RF rectifiers for EM power harvesting in a deep brain stimulating device

Hosain, Md. Kamal, Kouzani, Abbas Z., Tye, Susannah, Kaynak, Akif and Berk, Michael 2015, RF rectifiers for EM power harvesting in a deep brain stimulating device, Australasian physical and engineering sciences in medicine, vol. 38, no. 1, pp. 157-172, doi: 10.1007/s13246-015-0328-7.

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Title RF rectifiers for EM power harvesting in a deep brain stimulating device
Author(s) Hosain, Md. Kamal
Kouzani, Abbas Z.ORCID iD for Kouzani, Abbas Z. orcid.org/0000-0002-6292-1214
Tye, Susannah
Kaynak, AkifORCID iD for Kaynak, Akif orcid.org/0000-0002-6679-657X
Berk, MichaelORCID iD for Berk, Michael orcid.org/0000-0002-5554-6946
Journal name Australasian physical and engineering sciences in medicine
Volume number 38
Issue number 1
Start page 157
End page 172
Total pages 16
Publisher Springer
Place of publication Berlin, Germany
Publication date 2015-03
ISSN 1879-5447
Summary A passive deep brain stimulation (DBS) device can be equipped with a rectenna, consisting of an antenna and a rectifier, to harvest energy from electromagnetic fields for its operation. This paper presents optimization of radio frequency rectifier circuits for wireless energy harvesting in a passive head-mountable DBS device. The aim is to achieve a compact size, high conversion efficiency, and high output voltage rectifier. Four different rectifiers based on the Delon doubler, Greinacher voltage tripler, Delon voltage quadrupler, and 2-stage charge pumped architectures are designed, simulated, fabricated, and evaluated. The design and simulation are conducted using Agilent Genesys at operating frequency of 915 MHz. A dielectric substrate of FR-4 with thickness of 1.6 mm, and surface mount devices (SMD) components are used to fabricate the designed rectifiers. The performance of the fabricated rectifiers is evaluated using a 915 MHz radio frequency (RF) energy source. The maximum measured conversion efficiency of the Delon doubler, Greinacher tripler, Delon quadrupler, and 2-stage charge pumped rectifiers are 78, 75, 73, and 76 % at -5 dBm input power and for load resistances of 5-15 kΩ. The conversion efficiency of the rectifiers decreases significantly with the increase in the input power level. The Delon doubler rectifier provides the highest efficiency at both -5 and 5 dBm input power levels, whereas the Delon quadrupler rectifier gives the lowest efficiency for the same inputs. By considering both efficiency and DC output voltage, the charge pump rectifier outperforms the other three rectifiers. Accordingly, the optimised 2-stage charge pumped rectifier is used together with an antenna to harvest energy in our DBS device.
Language eng
DOI 10.1007/s13246-015-0328-7
Field of Research 090304 Medical Devices
Socio Economic Objective 861502 Medical Instruments
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069391

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