@inproceedings{c027982f96be4841a251c8267fcc3a0e,
title = "Qi Standard Compatible Metasurface for Multi-Device Wireless Power Transfer with Tunable Power Division",
abstract = "Multi-user wireless power transfer (WPT) systems represent the next-generation technology for mobile device charging under the Qi standard. To achieve this goal, conventional techniques typically employ a complex system with multiple transmitting coils and power electronic circuits with independent feeding channels. In this paper, we demonstrate a metasurface-enhanced WPT system capable of achieving this goal with a single transmitting coil. The metasurface passively reshapes the magnetic field into multiple beams at the receivers' locations. We demonstrate to improve the dual-receiver efficiency from 55.9% to 71.9%. We also demonstrate tuning the power division between the receivers and compensating power differences to receivers of different sizes. The power ratio between a larger and smaller receiver is adjusted from 1:0.12 to 1:1.20 with the metasurface.",
keywords = "metasurface, multi-device compatibility, wireless power transfer",
author = "Joshua Yu and Hanwei Wang and Xiaodong Ye and Chen, {Yun Sheng} and Yang Zhao",
note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 ; Conference date: 04-06-2023 Through 08-06-2023",
year = "2023",
doi = "10.1109/WPTCE56855.2023.10215927",
language = "English (US)",
series = "2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2023 IEEE Wireless Power Technology Conference and Expo, WPTCE 2023 - Proceedings",
address = "United States",
}