The University of Southampton
University of Southampton Institutional Repository

Position independent wearable 6.78 MHz near-field radiative wireless power transfer using electrically-small embroidered textile coils

Position independent wearable 6.78 MHz near-field radiative wireless power transfer using electrically-small embroidered textile coils
Position independent wearable 6.78 MHz near-field radiative wireless power transfer using electrically-small embroidered textile coils
Coupled wireless power transfer (WPT) has been widely used for near-field high-efficiency WPT applications. However, the efficiency of the WPT link is highly sensitive to separation and alignment, and is prone to over-coupling, making it unsuitable for mobile systems with unknown or loose coupling such as wearables. While ultra-high frequency (UHF) and microwave radiative WPT (0.3-3 GHz) enables meters-long separation between the transmitter and the receiver, free space propagation losses, and rectification inefficiencies, adversely limit the end-to-end efficiency of the WPT link. This work proposes radiative WPT, in the 6.78 MHz license-free band, based on resonant electrically small antennas fabricated using embroidered textile coils, tuned using L-matching networks. The proposed WPT system achieves a stable forward transmission of S21>–17 dB and S21>–28 dB, independent of coil, separation on the XZ and XY planes respectively, in a 27 m3 volume space. The presented approach demonstrates the highest WPT-link efficiency, and promises higher end-to-end efficiency, compared to UHF WPT.
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Komolafe, Abiodun O.
5e79fbab-38be-4a64-94d5-867a94690932
Zaghari, Bahareh
a0537db6-0dce-49a2-8103-0f4599ab5f6a
Wagih, Mahmoud
7e7b16ba-0c64-4f95-bd3c-99064055f693
Komolafe, Abiodun O.
5e79fbab-38be-4a64-94d5-867a94690932
Zaghari, Bahareh
a0537db6-0dce-49a2-8103-0f4599ab5f6a

Wagih, Mahmoud, Komolafe, Abiodun O. and Zaghari, Bahareh (2019) Position independent wearable 6.78 MHz near-field radiative wireless power transfer using electrically-small embroidered textile coils. PowerMEMS 2019: International Conference on Micro and Nanotechnology for Power generation and Energy Conversion Applications, , Krakow, Poland. 03 - 06 Dec 2019. 5 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Coupled wireless power transfer (WPT) has been widely used for near-field high-efficiency WPT applications. However, the efficiency of the WPT link is highly sensitive to separation and alignment, and is prone to over-coupling, making it unsuitable for mobile systems with unknown or loose coupling such as wearables. While ultra-high frequency (UHF) and microwave radiative WPT (0.3-3 GHz) enables meters-long separation between the transmitter and the receiver, free space propagation losses, and rectification inefficiencies, adversely limit the end-to-end efficiency of the WPT link. This work proposes radiative WPT, in the 6.78 MHz license-free band, based on resonant electrically small antennas fabricated using embroidered textile coils, tuned using L-matching networks. The proposed WPT system achieves a stable forward transmission of S21>–17 dB and S21>–28 dB, independent of coil, separation on the XZ and XY planes respectively, in a 27 m3 volume space. The presented approach demonstrates the highest WPT-link efficiency, and promises higher end-to-end efficiency, compared to UHF WPT.

Text
Power MEMS Separation independent WPT full paper - Accepted Manuscript
Download (692kB)

More information

Published date: December 2019
Venue - Dates: PowerMEMS 2019: International Conference on Micro and Nanotechnology for Power generation and Energy Conversion Applications, , Krakow, Poland, 2019-12-03 - 2019-12-06

Identifiers

Local EPrints ID: 436232
URI: http://eprints.soton.ac.uk/id/eprint/436232
PURE UUID: b3a0873b-d25d-4f85-af9b-ab3e63f0db48
ORCID for Mahmoud Wagih: ORCID iD orcid.org/0000-0002-7806-4333
ORCID for Abiodun O. Komolafe: ORCID iD orcid.org/0000-0002-3618-2390
ORCID for Bahareh Zaghari: ORCID iD orcid.org/0000-0002-5600-4671

Catalogue record

Date deposited: 04 Dec 2019 17:30
Last modified: 12 Oct 2024 02:34

Export record

Contributors

Author: Mahmoud Wagih ORCID iD
Author: Abiodun O. Komolafe ORCID iD
Author: Bahareh Zaghari ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×