Article (Scientific journals)
Wide dipole antennas for wireless powering of miniaturised bioelectronic devices
Aldaoud, Ammar; Lui, Samuel; Keng, Kai Sheng et al.
2020In Sensing and Bio-Sensing Research, 27
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Keywords :
Antennas; Bioelectronics; Biological tissue; Finite element method; Injectable; Retinal ganglion cells; Wireless power transfer
Abstract :
[en] Biomedical electronic implants require a power source to operate. Miniaturised implants can preclude batteries and as implant dimensions reduce further, inductive power transfer no longer becomes the optimum strategy for wireless power delivery. Wide dipole antennas are proposed as an alternative power transmitter for long and thin implants. A miniaturised bioelectronic device measuring 1 mm by 1 mm by 20 mm was fabricated, wirelessly powered and used to stimulate retinal ganglion cells to provide biological validation of its functionality. Optimised wide dipole antennas operating in the GHz range for implant depths of 5 mm to 35 mm in 5 mm steps were simulated, fabricated and measured. Saline solution was used as a biological tissue phantom for power transfer efficiency measurements. The maximum safe deliverable power to the device was 1.7 mW in simulation and 1.3 mW in measurement at power transfer efficiencies of 15% and 11% respectively. The work herein confirms that wide dipole transmitting antennas are suitable for radiative near field power transfer to long and thin implants. This power transfer technique could be used for implants that are injectable, deliverable via catheter and minimally invasive, advancing the aim to create smaller more innovative electronic implantable devices. © 2019
Disciplines :
Electrical & electronics engineering
Author, co-author :
Aldaoud, Ammar;  School of Physics, University of Melbourne, Parkville, Victoria, Australia
Lui, Samuel;  Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, Australia
Keng, Kai Sheng;  Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, Australia
Moshfegh, Sarina;  School of Biomedical Science, University of Melbourne, Parkville, Victoria, Australia
Soto-Breceda, Artemio;  Department of Biomedical Engineering, University of Melbourne, Parkville, Victoria, Australia, National Vision Research Institute, Australian College of Optometry, Carlton, Victoria, Australia
Tong, Wenyi ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Redouté, Jean-Michel  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes microélectroniques intégrés
Garrett, David J.;  School of Physics, University of Melbourne, Parkville, Victoria, Australia
Wong, Yan T.;  Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, Australia, Department of Physiology and Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
Prawer, Steven;  School of Physics, University of Melbourne, Parkville, Victoria, Australia
Language :
English
Title :
Wide dipole antennas for wireless powering of miniaturised bioelectronic devices
Publication date :
2020
Journal title :
Sensing and Bio-Sensing Research
eISSN :
2214-1804
Publisher :
Elsevier B.V.
Volume :
27
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
NHMRC - National Health and Medical Research Council
Available on ORBi :
since 31 March 2020

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