Coherently enhanced wireless power transfer: Theory and experiment

S. Li, A. Krasnok*, D. Baranov, A. Generalov, A. Alù

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

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Abstract

Extraction of electromagnetic energy by an antenna to a coupled waveguide is the crucial part of wireless power transfer. Efficiency of this process is usually defined by the coupling strength between the antenna and the outcoupling waveguide or cable. We show that there is an additional possibility to improve the receiving efficiency by coherent excitation of the outcoupling waveguide by a backward propagating guided mode with a specific amplitude and phase. This additional wave creates a special interference picture in the system and result in increased amount of energy extracted to the waveguide from the free space. We develop a simple analytical model predicting this effect, demonstrate it in numerical FDTD simulations, and verify in microwave experiment.

Original languageEnglish
Article number012078
JournalJournal of Physics: Conference Series
Volume1092
DOIs
Publication statusPublished - 1 Jan 2018
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Metamaterials and Nanophotonics - Sochi, Russian Federation
Duration: 17 Sep 201821 Sep 2018
Conference number: 3

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