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Textile-based radio frequency energy harvesting and storage using ultra-compact rectennas with high effective-to-physical area ratio

Textile-based radio frequency energy harvesting and storage using ultra-compact rectennas with high effective-to-physical area ratio
Textile-based radio frequency energy harvesting and storage using ultra-compact rectennas with high effective-to-physical area ratio
Wearable Radio Frequency (RF) rectennas do not require expensive or hazardous materials and can be easily integrated with conventional e-textiles. In this paper, we investigate the use of ultra-miniaturized wire-type monopole antennas for energy harvesting (EH) applications, as a method maximizing the effective collection area of a rectenna relative to its physical size, while not reducing the net DC output. The rectenna, operating in the 915 MHz band, is integrated with a simple carbon-based e-textile supercapacitor for direct energy conversion and storage. The integrated module is then demonstrated, for the first time, wirelessly-charging a Bluetooth Low Energy sensor node at over 1 m distance from a license-free Powercast transmitter. The 14.1 mF supercapacitor is charged using the e-textile rectenna filament in 83 s up to 4.14 V, from an incident power density of 23.9 μW/cm 2 and a time-averaged efficiency over 40%, enabling the sensor node to sustain operation for 108 s after the wireless RF source is stopped. Compared to state-of-the-art RF energy harvesters, the proposed module achieves over five fold improvement in the RF to DC power harvesting efficiency normalized to the harvester’s area.
rectennas, supercapacitor, textile supercapacitor, textile, RF, energy harvesting, RFEH, wireless power transfer, wireless power transmission, rectifiers, rectenna supercapacitor integration, wearable rectennas, antenna effective area
IEEE
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Hillier, Nicholas
6bde7893-a2db-4edd-9e12-a8ab17aa3702
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
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d

Wagih, Mahmoud, Hillier, Nicholas, Weddell, Alex S. and Beeby, Steve (2021) Textile-based radio frequency energy harvesting and storage using ultra-compact rectennas with high effective-to-physical area ratio. In 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS). IEEE. 4 pp . (doi:10.1109/PowerMEMS54003.2021.9658367).

Record type: Conference or Workshop Item (Paper)

Abstract

Wearable Radio Frequency (RF) rectennas do not require expensive or hazardous materials and can be easily integrated with conventional e-textiles. In this paper, we investigate the use of ultra-miniaturized wire-type monopole antennas for energy harvesting (EH) applications, as a method maximizing the effective collection area of a rectenna relative to its physical size, while not reducing the net DC output. The rectenna, operating in the 915 MHz band, is integrated with a simple carbon-based e-textile supercapacitor for direct energy conversion and storage. The integrated module is then demonstrated, for the first time, wirelessly-charging a Bluetooth Low Energy sensor node at over 1 m distance from a license-free Powercast transmitter. The 14.1 mF supercapacitor is charged using the e-textile rectenna filament in 83 s up to 4.14 V, from an incident power density of 23.9 μW/cm 2 and a time-averaged efficiency over 40%, enabling the sensor node to sustain operation for 108 s after the wireless RF source is stopped. Compared to state-of-the-art RF energy harvesters, the proposed module achieves over five fold improvement in the RF to DC power harvesting efficiency normalized to the harvester’s area.

Text
Wagih21_PowerMEMS_RFCompact_ep - Accepted Manuscript
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More information

Published date: December 2021
Venue - Dates: Micro and Nanotechnology for Power Generation and Energy Conversion Applications, United Kingdom, 2021-12-06 - 2021-12-09
Keywords: rectennas, supercapacitor, textile supercapacitor, textile, RF, energy harvesting, RFEH, wireless power transfer, wireless power transmission, rectifiers, rectenna supercapacitor integration, wearable rectennas, antenna effective area

Identifiers

Local EPrints ID: 454455
URI: http://eprints.soton.ac.uk/id/eprint/454455
PURE UUID: 4b3d9e10-de58-41bd-a997-2b12cdd107cd
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333
ORCID for Nicholas Hillier: ORCID iD orcid.org/0000-0002-3544-8329
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

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Date deposited: 10 Feb 2022 17:31
Last modified: 25 Jun 2022 02:03

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Contributors

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

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