Wide dipole antennas for wireless powering of miniaturised bioelectronic devices

Ammar Aldaoud; Samuel Lui; Kai Sheng Keng; Sarina Moshfegh; Artemio Soto-Breceda; Wei Tong; Jean-Michel Redoute; Jean-Michel Redoute; David J. Garrett; Yan T. Wong; Steven Prawer

doi:10.1016/j.sbsr.2019.100311

Wide dipole antennas for wireless powering of miniaturised bioelectronic devices

Ammar Aldaoud, Samuel Lui, Kai Sheng Keng, Sarina Moshfegh, Artemio Soto-Breceda, Wei Tong, Jean-Michel Redoute, Jean-Michel Redoute, David J. Garrett, Yan T. Wong, Steven Prawer

Australian Council for Educational Research (ACER)

Research output: Contribution to journal › Article › peer-review

Abstract

 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 1mm by 1mm by 20mm 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 5mm to 35mm in 5mm 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 1.7mW in simulation and
 1.3mW 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.

Original language	English
Journal	Sensing and bio-sensing research
Volume	27
DOIs	https://doi.org/10.1016/j.sbsr.2019.100311
Publication status	Published - 1 Feb 2020

Keywords

Antennas
Bioelectronics
Biological tissue
Injectable
Retinal ganglion cells
Wireless power transfer

Disciplines

Materials Science and Engineering
Semiconductor and Optical Materials

Access to Document

10.1016/j.sbsr.2019.100311Licence: Unspecified

https://www.sciencedirect.com/science/article/pii/S221418041930145X

Cite this

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title = "Wide dipole antennas for wireless powering of miniaturised bioelectronic devices",

abstract = " 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 1mm by 1mm by 20mm 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 5mm to 35mm in 5mm 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 1.7mW in simulation and 1.3mW 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.",

keywords = "Antennas, Bioelectronics, Biological tissue, Injectable, Retinal ganglion cells, Wireless power transfer",

author = "Ammar Aldaoud and Samuel Lui and Keng, {Kai Sheng} and Sarina Moshfegh and Artemio Soto-Breceda and Wei Tong and Jean-Michel Redoute and Jean-Michel Redoute and Garrett, {David J.} and Wong, {Yan T.} and Steven Prawer",

note = "Wide dipole transmitters provide an efficient means of powering submillimeter diameter electronic implants. * The electromagnetic characteristics of biological media imply an optimum transmitting antenna for a given implant depth. * A device less than a millimeter in diameter and 20 mm long is capable of efficiently receiving wireless power.",

year = "2020",

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doi = "10.1016/j.sbsr.2019.100311",

language = "English",

volume = "27",

journal = "Sensing and bio-sensing research",

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T1 - Wide dipole antennas for wireless powering of miniaturised bioelectronic devices

AU - Aldaoud, Ammar

AU - Lui, Samuel

AU - Keng, Kai Sheng

AU - Moshfegh, Sarina

AU - Soto-Breceda, Artemio

AU - Tong, Wei

AU - Redoute, Jean-Michel

AU - Garrett, David J.

AU - Wong, Yan T.

AU - Prawer, Steven

N1 - Wide dipole transmitters provide an efficient means of powering submillimeter diameter electronic implants. * The electromagnetic characteristics of biological media imply an optimum transmitting antenna for a given implant depth. * A device less than a millimeter in diameter and 20 mm long is capable of efficiently receiving wireless power.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - 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 1mm by 1mm by 20mm 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 5mm to 35mm in 5mm 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 1.7mW in simulation and 1.3mW 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.

AB - 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 1mm by 1mm by 20mm 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 5mm to 35mm in 5mm 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 1.7mW in simulation and 1.3mW 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.

KW - Antennas

KW - Bioelectronics

KW - Biological tissue

KW - Injectable

KW - Retinal ganglion cells

KW - Wireless power transfer

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