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Powering e-textiles using a single thread radio frequency energy harvesting rectenna

Powering e-textiles using a single thread radio frequency energy harvesting rectenna
Powering e-textiles using a single thread radio frequency energy harvesting rectenna
Radio Frequency Energy Harvesting (RFEH) and Wireless Power Transfer (WPT) are increasingly seen as a method of enabling sustainable computing, as opposed to mechanical or solar EH WPT does not require special materials or resonators and can be implemented using low-cost conductors and standard semiconductor devices. This work revisits the simplest antenna design, the wire monopole to demonstrate the lowest-footprint, lowest-cost rectifying antenna (rectenna) based on a single Schottky diode. The antenna is fabricated using a single Litz-wire silk-coated thread, embroidered into a standard textile substrate. The rectifier is fabricated on a compact low-cost flexible printed circuit board (PCB) using ultra-thin Polyimide copper laminates to accommodate low-footprint surface mount components. The antenna maintains its bandwidth across the 868/915 MHz license-free band on- and off-body with only −4.7 dB degradation in total efficiency in human proximity. The rectenna achieves up to 55% RF to DC efficiency with 1.8 V DC output, at 1 mW of RF power, demonstrating its suitability as a power-supply unit for ultra-low power e-textile nodes.
antenna, e-textiles, Wireless Power Transfer, energy harvesting, rectenna, wearables, rectifiers
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Weddell, Alex S. and Beeby, Steve (2021) Powering e-textiles using a single thread radio frequency energy harvesting rectenna. International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic Textiles. 03 - 04 Nov 2020. (doi:10.3390/proceedings2021068016).

Record type: Conference or Workshop Item (Paper)

Abstract

Radio Frequency Energy Harvesting (RFEH) and Wireless Power Transfer (WPT) are increasingly seen as a method of enabling sustainable computing, as opposed to mechanical or solar EH WPT does not require special materials or resonators and can be implemented using low-cost conductors and standard semiconductor devices. This work revisits the simplest antenna design, the wire monopole to demonstrate the lowest-footprint, lowest-cost rectifying antenna (rectenna) based on a single Schottky diode. The antenna is fabricated using a single Litz-wire silk-coated thread, embroidered into a standard textile substrate. The rectifier is fabricated on a compact low-cost flexible printed circuit board (PCB) using ultra-thin Polyimide copper laminates to accommodate low-footprint surface mount components. The antenna maintains its bandwidth across the 868/915 MHz license-free band on- and off-body with only −4.7 dB degradation in total efficiency in human proximity. The rectenna achieves up to 55% RF to DC efficiency with 1.8 V DC output, at 1 mW of RF power, demonstrating its suitability as a power-supply unit for ultra-low power e-textile nodes.

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More information

Published date: 25 January 2021
Venue - Dates: International Conference on the Challenges, Opportunities, Innovations and Applications in Electronic Textiles, 2020-11-03 - 2020-11-04
Keywords: antenna, e-textiles, Wireless Power Transfer, energy harvesting, rectenna, wearables, rectifiers

Identifiers

Local EPrints ID: 446301
URI: http://eprints.soton.ac.uk/id/eprint/446301
PURE UUID: ed16084a-baf4-4832-8893-fca7c96d5346
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333
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: 04 Feb 2021 17:30
Last modified: 16 Sep 2021 11:16

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