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Wearable e-textile wireless RF power supply based on a textile supercapacitor and a flexible rectenna filament

Wearable e-textile wireless RF power supply based on a textile supercapacitor and a flexible rectenna filament
Wearable e-textile wireless RF power supply based on a textile supercapacitor and a flexible rectenna filament
Sustainable battery-free operation is a requirement for wearable electronic textiles. This work presents a complete wearable textile-based radio frequency energy harvester and an energy storage module. The rectifying-antenna (rectenna) receives incident sub-1 GHz RF power from a license-free transmitter and converts it to DC with up to 90% efficiency and 8 V DC output from under 4 mW of RF power. A spray-coated in-house textile 7.1 mF supercapacitor is integrated as an energy storage unit. Electrochemical Impedance Spectroscopy has been used to characterize the supercapacitor's impedance and a four-branch circuit model has been obtained. The 7.1 mF textile supercapacitor has been demonstrated charging to 1 V (3.55 mJ) in under 11 seconds at 1.2 m separation from a wireless power source, demonstrating over 15% end-to-end efficiency, the highest charging efficiency of a textile supercapacitor from an integrated flexible energy source.
Antenna, Wireless Power Transfer, Supercapacitor, RF Energy Harvesting, Rectenna, E-textiles
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Hillier, Nicholas
6bde7893-a2db-4edd-9e12-a8ab17aa3702
Yong, Sheng
688cbcf0-b32e-4b2b-9891-a0e0e1f59d71
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Hillier, Nicholas
6bde7893-a2db-4edd-9e12-a8ab17aa3702
Yong, Sheng
688cbcf0-b32e-4b2b-9891-a0e0e1f59d71
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Hillier, Nicholas, Yong, Sheng, Weddell, Alex S. and Beeby, Steve (2020) Wearable e-textile wireless RF power supply based on a textile supercapacitor and a flexible rectenna filament. IEEE FLEPS 2020: IEEE International Conference on Flexible and Printable Sensors and Systems, , Manchester, United Kingdom. 16 - 19 Aug 2020. (In Press)

Record type: Conference or Workshop Item (Paper)

Abstract

Sustainable battery-free operation is a requirement for wearable electronic textiles. This work presents a complete wearable textile-based radio frequency energy harvester and an energy storage module. The rectifying-antenna (rectenna) receives incident sub-1 GHz RF power from a license-free transmitter and converts it to DC with up to 90% efficiency and 8 V DC output from under 4 mW of RF power. A spray-coated in-house textile 7.1 mF supercapacitor is integrated as an energy storage unit. Electrochemical Impedance Spectroscopy has been used to characterize the supercapacitor's impedance and a four-branch circuit model has been obtained. The 7.1 mF textile supercapacitor has been demonstrated charging to 1 V (3.55 mJ) in under 11 seconds at 1.2 m separation from a wireless power source, demonstrating over 15% end-to-end efficiency, the highest charging efficiency of a textile supercapacitor from an integrated flexible energy source.

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Rectenna_Supercap_FLEPS - Author's Original
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More information

Accepted/In Press date: 2020
Venue - Dates: IEEE FLEPS 2020: IEEE International Conference on Flexible and Printable Sensors and Systems, , Manchester, United Kingdom, 2020-08-16 - 2020-08-19
Keywords: Antenna, Wireless Power Transfer, Supercapacitor, RF Energy Harvesting, Rectenna, E-textiles

Identifiers

Local EPrints ID: 441677
URI: http://eprints.soton.ac.uk/id/eprint/441677
PURE UUID: c3e83b2b-2bfb-43aa-a92f-10eb43749d34
ORCID for Sheng Yong: ORCID iD orcid.org/0000-0002-8588-5981
ORCID for Alex S. Weddell: ORCID iD orcid.org/0000-0002-6763-5460
ORCID for Steve Beeby: ORCID iD orcid.org/0000-0002-0800-1759

Catalogue record

Date deposited: 24 Jun 2020 16:30
Last modified: 03 Mar 2021 05:01

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Contributors

Author: Mahmoud Wagih
Author: Nicholas Hillier
Author: Sheng Yong ORCID iD
Author: Alex S. Weddell ORCID iD
Author: Steve Beeby ORCID iD

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