Coherently enhanced wireless power transfer: Theory and experiment
Paper in proceedings, 2018

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.

Antennas

Electromagnetic waves

Waveguides

Energy transfer

Author

S. Li

ITMO University

A. E. Krasnok

The University of Texas at Austin

ITMO University

Denis Baranov

Moscow Institute of Physics and Technology

Chalmers, Physics, Bionanophotonics

Andrey Generalov

Aalto University

Andrea Alu

The University of Texas at Austin

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 1092 012078

3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018
Sochi, Russia,

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1088/1742-6596/1092/1/012078

More information

Latest update

1/8/2019 1