A multibeam antenna system fed by a compact Rotman lens is presented in multilayer
substrate integrated waveguide (SIW) technology. The lens is implemented in two layers …

We describe the design of a radial line slot array antenna with a shaped and focused near
field. The antenna is designed in such a way to control the side lobe level and beamwidth of …

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

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 …

Objective: The potentialities of improving the penetration of millimeter waves for breast
cancer imaging are here explored. Methods: A field focusing technique based on a convex …

This article presents a circularly polarized corporate-fed radial-line slot antenna (CF-RLSA)
operating in Ka-band and realized in low-cost, low-profile printed circuit board (PCB) …

A novel compact monopulse cavity-backed substrate integrated waveguide (SIW) antenna is
proposed. The antenna consists of an array of four circularly polarized (CP) cavity-backed …

A multibeam pillbox antenna system incorporating monopulse phase comparison technique
is proposed in the 24-GHz band. This low-profile antenna architecture combines the …

The manipulation of the near-field (NF) is a challenging topic in electromagnetics, carrying
essential importance for several applications. In this paper, we develop an algorithm …

The development of modern communication devices for the latest technologies such as 5G
has brought the millimeter wave technology into the spotlight because it offers higher data …