The generation of focused beams in the millimeter-and submillimeter-wave ranges, with
transverse-electric (TE) polarization, is investigated in the radiative near-field region. The …

Graphene ohmic losses notably hinder the efficiency of graphene-based terahertz (THz)
devices. Hybrid metal–graphene structures have recently been proposed to mitigate this …

Two-dimensional leaky-wave antennas offer effective, compact, single-feeder, easy-
tofabricate solutions to the longstanding problem of realizing a simultaneously directive and …

In this paper, we present an array-fed Fabry–Perot cavity antenna (FPCA) based on a
partially reflecting sheet (PRS) capable of generating a circularly polarized (CP), highly …

Exciting high-power resonators pose challenges such as managing power reflections, which
can cause energy losses and damage system components. This is crucial for applications …

A comprehensive analysis of Fabry–Perot cavity antennas (FPCAs) employing thick-and thin-
partially reflecting sheets (PRSs) is presented. The transition between thin-and thick-PRS …

This study introduces a tunable optical system based on liquid crystal gratings, designed for
the infrared (IR) spectrum. The system is designed to be compact, occupying only a few …

In this paper, we present an array-fed Fabry–Perot cavity antenna (FPCA) based on a
partially reflecting sheet (PRS) capable of generating a circularly polarized (CP), highly …

Recently, hybrid-polarized Bessel beams have been proposed as a valid solution to radiate
focused beams in the near-field region at microwaves and millimeter-waves. As shown by …