A radially periodic 2-D leaky-wave (LW) antenna is studied for the generation of zeroth-order
Bessel beams within a limited spatial region and over a wide-frequency range. The antenna …

We present a Bessel-beam launcher based on a leaky radial waveguide consisting of a
capacitive sheet over a ground plane that supports higher-order leaky modes. A propagating …

In this communication, we present a theoretical analysis, design, and fabrication of a limited-
diffractive planar Bessel beam launcher, that exhibits a zeroth-order Bessel profile in the …

A wideband phase shifting surface (PSS) antenna is presented with stable and large quasi-
nondiffraction range. The operation principles and design procedures for the wideband near …

This chapter illustrates the capabilities of non-diffractive Bessel beams for near-field
focusing. After a brief introduction of the non-diffractive phenomenon and its origin, the …

In this paper, we prove experimentally that nondiffractive Bessel beams can be generated by
using inward cylindrical traveling wave aperture distributions. An azimuthally invariant …

This article proposes a novel nondiffractive Bessel beam launcher based on discrete
dielectric lens (DDL) antenna with 2-D beam-scanning capability operating at 300 GHz. The …

In this communication, it is shown that a nondiffracting vortex beam (ie, a higher order
Bessel beam with azimuthal phase variation) can be generated in the near field by …

This paper deals with the design of scalar metasurface antennas capable of radiating a well-
polarized beam in the far-field or near-field zones. The equivalent electric current over the …

Localized waves, ie, the wide class of limited-diffraction, limited-dispersion solutions to the
wave equation are generally characterized by real wave numbers. We consider the role …