Wagih, M. , Hillier, N., Yong, S., Weddell, A. S. and Beeby, S. (2020) Wearable E-Textile Wireless RF Power Supply Based on a Textile Supercapacitor and a Flexible Rectenna Filament. In: 2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS), Manchester, UK, 16-19 Aug 2020, ISBN 9781728152783 (doi: 10.1109/FLEPS49123.2020.9239429)
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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.
| Item Type: | Conference Proceedings |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Wagih, Dr Mahmoud |
| Authors: | Wagih, M., Hillier, N., Yong, S., Weddell, A. S., and Beeby, S. |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| ISBN: | 9781728152783 |
| Published Online: | 30 October 2020 |
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