Effects of a Cylindrical Metallic Cavity on the Radiation of Longitudinally Polarized Limited-Diffractive Bessel Beams

Abstract

This letter deals with the problem of evaluating the effect of a cylindrical metallic cavity on the radiation of a planar longitudinally polarized Bessel beam launcher, as it could arise in applications related to microwave heating or plasma ignition. A full analytical model is developed to extract fundamental physics insight of the problem at hand. Full-wave numerical simulations by COMSOL multiphysics are used to validate the proposed model, showing fair agreement between simulations and theoretical predictions.

Near-Field Power Efficiency Maximization of a Bessel-Shaped Beam Through Planar Layered Media

“…Despite pure Bessel beams require an infinite radiating distribution to be radiated, like plane waves, nowadays different high-efficiency truncated Bessel beam launchers were successfully designed and fabricated both at optical frequencies [13]- [15] and at microwaves and millimeter waves [16]- [18]. However, at present not much attention has been paid, from electromagnetics engineering perspective, to the propagation of Bessel beams, and, more in general, of nondiffractive waves, in more complex environments than free-space (an exception can be found in [19] in the case of closed metallic cavities), such as in layered media. Recent interesting works have been devoted to the analysis, optimal design, and synthesis [20]- [24] of focusing arrays in near-field and to the maximization of wireless power transfer also in lossy media [25]- [27].…”