Orbital angular momentum (OAM) has aroused a widespread interest in many fields,
especially in telecommunications due to its potential for unleashing new capacity in the …

In recent years, vortex beams with orbital angular momentum (OAM) have attracted more
and more attention. The wavefront of the OAM beams is helical, the intensity at the center of …

Orbital angular momentum (OAM) at radio frequency (RF) provides a novel approach of
multiplexing a set of orthogonal modes on the same frequency channel to achieve high …

In this paper, an electromagnetic metasurface is designed, fabricated, and experimentally
demonstrated to generate multiple orbital angular momentum (OAM) vortex beams in radio …

Mode division multiplexing (MDM) using orbital angular momentum (OAM) is a recently
developed physical layer transmission technique, which has obtained intensive interest …

Vortex beams have been extensively realized using different approaches. Typically, the
efficiency and bandwidth of a vortex beam are limited by impure copolarized components …

A system is proposed to generate vortex electromagnetic (EM) beams in the microwave
band, which generates high-order vortex beams at the X-frequency band for the first time …

There is a continuing growth in the demand for data bandwidth, and the multiplexing of
multiple independent data streams has the potential to provide the needed data capacity …

Communications using the orbital angular momentum (OAM) of radio waves have attracted
much attention in recent years. In this paper, a novel millimeter-wave dual OAM mode …

An ultralow reflectivity spiral phase plate (SPP) is proposed to generate an orbital angular
momentum (OAM) beam at millimeter-wave frequency. The SPP is composed of unit cells …