Phase-modulation based transmitarray convergence lens for vortex wave carrying orbital angular momentum.
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TLDR
Simulation results verify the ability of the MS lens to achieve OAM beam focusing, which is advantageous for enhancing the propagation directivity and increasing the gain in the main lobes of vortex waves, of particular importance in microwave wireless communication applications.Abstract:
Vortex electromagnetic (EM) waves hold promise for their ability to significantly increase the transmission capacity of wireless communication systems via the torsion resistance defined by different topological charges associated with the orbital angular momentum (OAM). However, the application of vortex waves in remote distance transmission is limited by its characteristic of divergence. In this paper, a lens based on a phase-modulation metasurface (MS) is proposed that enables vortex EM waves to converge, thereby improving their propagation performance at microwave frequencies. A phase-shift distribution on the plane of the MS is obtained based on the concept of the optical converging axicon, which can convert a Laguerre-Gaussian (LG) beam to a Bessel beam based on changing the propagation direction. Simulation results verify the ability of the MS lens to achieve OAM beam focusing, which is advantageous for enhancing the propagation directivity and increasing the gain in the main lobes of vortex waves. This is of particular importance in microwave wireless communication applications.read more
Citations
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Polarization-Engineered Noninterleaved Metasurface for Integer and Fractional Orbital Angular Momentum Multiplexing
Kuang Zhang,Yueyi Yuan,Xumin Ding,Haoyu Li,Badreddine Ratni,Qun Wu,Jian Liu,Shah Nawaz Burokur,Jiubin Tan +8 more
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A Review of Orbital Angular Momentum Vortex Beams Generation: From Traditional Methods to Metasurfaces
TL;DR: In this article, a review of the generation of vortex beams carrying orbital angular momentum in the microwave domain is presented, which rely on two main methods; plane wave to vortex wave conversion and direct generation using radiating antennas.
Journal ArticleDOI
Dual-band vortex beam generation with different OAM modes using single-layer metasurface
TL;DR: Simulated and experimental results demonstrate good performance of the proposed single-layer metasurface at the above two frequency bands.
Journal ArticleDOI
Broadband High-Efficiency Electromagnetic Orbital Angular Momentum Beam Generation Based on a Dielectric Metasurface
TL;DR: In this article, the authors proposed a metasurface composed of high-refractive-index dielectric resonators to achieve broadband OAM beam generation with high efficiency, which indicates that proper adjustment of the dimensions and rotation of the resonators can render broadband and high-efficiency full phase control.
Journal ArticleDOI
Generation of Broadband High-Purity Dual-Mode OAM Beams Using A Four-Feed Patch Antenna: Theory and Implementation
TL;DR: A broadband four-feed circular patch antenna is demonstrated to generate high-purity dual-mode vortex beams carrying orbital angular momentum (OAM) for the first time.
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