Open AccessBessel–Gauss Beam Launchers for Wireless Power Transfer
Author(s) -
Srdan Pakovic,
Siyi Zhou,
David Gonzalez-Ovejero,
Santi Concetto Pavone,
Anthony Grbic,
Mauro Ettorre
Publication year - 2021
Publication title -
ieee open journal of antennas and propagation
Language(s) - English
Resource type - Journals
ISSN - 2637-6431
DOI - 10.1109/ojap.2021.3078234
Subject(s) - fields, waves and electromagnetics , communication, networking and broadcast technologies , aerospace
In this work, we study the use of Bessel-Gauss beam launchers for wireless power transfer (WPT) applications. The power transfer efficiency between two radiating apertures is investigated in the radiative near field. A spectral Green's function approach is used to derive the power efficiency under a simultaneous conjugate impedance match. The transverse electromagnetic (TEM) mode of a coaxial cable, as well as Bessel beam (BB) and Bessel-Gauss beam (BGB) field distributions, are considered as aperture distributions. Numerical results demonstrate that a BGB field distribution is the optimal choice for WPT due to its limited spectrum and reduced diffraction of the radiated beam. We synthesized a Bessel-Gauss launcher that exhibits power efficiency exceeding 50% for distances larger than 30λ. These results show that non-diffracting beams can pave the way toward efficient near-field WPT systems with extended operating ranges.