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Investigation of surface wave propagation along a multi‐coil wireless power transfer system
Author(s) -
Xu Bin,
Li Yang
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30023
Subject(s) - repeater (horology) , wireless power transfer , electromagnetic coil , surface wave , microwave , propagation constant , power (physics) , wave propagation , acoustics , maximum power transfer theorem , electrical engineering , materials science , computational physics , physics , electronic engineering , optics , engineering , telecommunications , thermodynamics , coupling (piping) , metallurgy
The surface wave propagation along a multi‐coil wireless power transfer system is investigated with the motivation of extending power transfer range. First, the power transfer efficiencies of coil arrays with different numbers of repeaters are simulated and measured. Then the wave propagation along the array is investigated and its associated wave characteristics are extracted using a super resolution algorithm. A backward traveling surface wave is found to be the dominant propagation mechanism, and its decay constant decreases as the number of repeater increases. An empirical formula correlating the power transfer efficiency with the surface wave decay constant is proposed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2261–2265, 2016