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Enhanced efficiency of magnetic resonant wireless power transfer system using rollable and foldable metasurface based on polyimide substrate

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Abstract

This paper proposes a rollable and foldable metamaterial structure that can improve the efficiency of a magnetic resonant wireless power transfer (MR-WPT) system operating at 13.56 MHz. The metasurface is fabricated on a thin polyimide substrate with a thickness of 0.1 mm and positioned between the transmitter and receiver coils of the MR-WPT system. This allows the metasurface to be fully flexible, making it possible to roll it around a cylindrical bar or fold it to follow the misalignment angle of the receiver. The rollable and foldable metasurface makes the configuration of the MR-WPT system more flexible and compact, thereby increasing its applicability. Detailed investigations of the proposed MR-WPT system were conducted through simulation and experiment. The efficiency of the MR-WPT system can be significantly improved from 30 to 50.5% when the full metasurface is used. The proposed metasurface can be rolled and disappear, making it useful in situations where the MR-WPT system configuration requires high flexibility. Additionally, a foldable metasurface can improve the transfer efficiency of misalignment MR-WPT systems from 8.8 to 28.1% in the case of a misalignment angle of 30o. Overall, this work presents a promising solution for enhancing the efficiency of MR-WPT systems and increasing their flexibility.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

This research was supported by the Excellent Research Team Development Program grant funded by the Vietnam Academy of Science and Technology (VAST), Grant No. NCXS02.01/23–24.

Funding

Le Thi Hong Hiep was funded by the Master, PhD Scholarship Programme of Vingroup Innovation Foundation (VINIF), code VINIF.2022.TS040.

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Contributions

Le Thi Hong Hiep: Conceptualization and investigation; Huu Nguyen Bui: Measurement; Bui Son Tung: Visualization; Vu Dinh Lam: Review and editing and Supervision; Bui Xuan Khuyen: Methodology; Thanh Son Pham: Conceptualization and writing—review and editing. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Thanh Son Pham.

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Hiep, L.T.H., Bui, H.N., Tung, B.S. et al. Enhanced efficiency of magnetic resonant wireless power transfer system using rollable and foldable metasurface based on polyimide substrate. Appl. Phys. A 130, 521 (2024). https://doi.org/10.1007/s00339-024-07684-4

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