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Quasioptics for increasing the beam efficiency of wireless power transfer systems

The highest beam efficiency in a wireless power transfer (WPT) system that uses focusing components was 51%, using a ≈ 3 m diameter reflector for a transfer distance of 7.62 m . We have beaten that record, and present here a system that surpasses it by 25%. Using the quasioptical framework for reduc...

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Bibliographic Details
Published in:Scientific reports 2022-12, Vol.12 (1), p.20894-20894, Article 20894
Main Authors: Pereira, Ricardo A. M., Carvalho, Nuno Borges
Format: Article
Language:English
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Summary:The highest beam efficiency in a wireless power transfer (WPT) system that uses focusing components was 51%, using a ≈ 3 m diameter reflector for a transfer distance of 7.62 m . We have beaten that record, and present here a system that surpasses it by 25%. Using the quasioptical framework for reducing spillover losses in WPT, we present a double-reflector system that achieved a higher beam efficiency than the state-of-the-art. The transmitting and receiving antennas were 3D-printed conical smooth-walled horn antennas, specially designed for this purpose. The theoretical analysis enabled the design of a 5 m system, whose energy focus location has been experimentally verified. Then, the complete system was experimented upon, enabling a high beam transfer efficiency of 63.75%. Additionally, the advantage of using quasioptics in radiative wireless power transfer applications is discussed, as well as the sensitivity of its systems. Finally, a comparison with the state-of-the-art is done by the proposal of new figures-of-merit, relating the systems’ physical dimensions and beam efficiency. This research is a paradigm shift by presenting a promising path for future WPT research through quasioptics, whose high efficiencies may enable commercial applications of this technology for solving power supply issues in our society.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-25251-w