Analyzing and maximizing the power harvesting efficiency of a textile rectenna through reflector-based shielding
Analyzing and maximizing the power harvesting efficiency of a textile rectenna through reflector-based shielding
Wearable rectennas harvest power from off-body sources; shielding mechanisms such as microstrip antennas' ground planes are typically used to reduce absorption by the body. This work investigates the use of unconnected reflectors to improve textile rectennas' harvesting capabilities. A high-efficiency rectenna using a textile-based rectifier, achieving over 40% RF-DC efficiency from −20 dBm power, and a monopole is investigated with different clothing layers in the presence and absence of a reflector. It is shown that a textile reflector can improve the DC output of a rectenna, on an external clothing layer, by over 100% through improving the measured gain by 2.4 dB. However, for rectennas with less than 2.0 mm clearance from the body, a reflector can have detrimental effect on the rectenna. The proposed reflector-backed rectenna achieves a wearable harvesting efficiency of 40%, from an ultra-low power density of 0.3 μW/cm 2, demonstrating significant sensitivity improvement over state-of-the-art rectennas.
Antenna, Electronic Textile, RF Energy Harvesting, Rectifier, Wireless Power Transfer
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Weddell, Alex S.
3d8c4d63-19b1-4072-a779-84d487fd6f03
Beeby, Steve
ba565001-2812-4300-89f1-fe5a437ecb0d
27 April 2021
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)
Analyzing and maximizing the power harvesting efficiency of a textile rectenna through reflector-based shielding.
In 15th European Conference on Antennas and Propagation, EuCAP 2021.
IEEE..
(doi:10.23919/EuCAP51087.2021.9411484).
Record type:
Conference or Workshop Item
(Paper)
Abstract
Wearable rectennas harvest power from off-body sources; shielding mechanisms such as microstrip antennas' ground planes are typically used to reduce absorption by the body. This work investigates the use of unconnected reflectors to improve textile rectennas' harvesting capabilities. A high-efficiency rectenna using a textile-based rectifier, achieving over 40% RF-DC efficiency from −20 dBm power, and a monopole is investigated with different clothing layers in the presence and absence of a reflector. It is shown that a textile reflector can improve the DC output of a rectenna, on an external clothing layer, by over 100% through improving the measured gain by 2.4 dB. However, for rectennas with less than 2.0 mm clearance from the body, a reflector can have detrimental effect on the rectenna. The proposed reflector-backed rectenna achieves a wearable harvesting efficiency of 40%, from an ultra-low power density of 0.3 μW/cm 2, demonstrating significant sensitivity improvement over state-of-the-art rectennas.
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More information
Accepted/In Press date: 2021
e-pub ahead of print date: 27 April 2021
Published date: 27 April 2021
Additional Information:
Funding Information:
This work was supported by the European Commission through the EnABLES Project: European Infrastructure Powering the Internet of Things, funded under H2020-EU.1.4.1.2. grant number: 730957.
Publisher Copyright:
© 2021 EurAAP.
Venue - Dates:
2021 15th European Conference on Antennas and Propagation (EuCAP), , Dusseldorf, Germany, 2021-03-22 - 2021-03-26
Keywords:
Antenna, Electronic Textile, RF Energy Harvesting, Rectifier, Wireless Power Transfer
Identifiers
Local EPrints ID: 446365
URI: http://eprints.soton.ac.uk/id/eprint/446365
PURE UUID: 7fdc4dd7-8a0d-44f1-9d1a-c394e2ac1f9f
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Date deposited: 05 Feb 2021 17:31
Last modified: 04 Nov 2025 03:00
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Contributors
Author:
Mahmoud Wagih
Author:
Alex S. Weddell
Author:
Steve Beeby
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