2020/05/29 by Zelin Zhu, Shilie Zheng, Xiaowen Xiong +4 · 28 citations
Materials Science · Physics and Astronomy · #Angular momentum #Antenna (radio) #Azimuth #Bandwidth (computing) #Coaxial #Control reconfiguration #Metamaterials and Metasurfaces Applications #Multi-mode optical fiber #Optical Coatings and Gratings #Orbital Angular Momentum in Optics #Radiation pattern #Resonator #Spiral (railway) #physics.class-ph
paper · pdf · doi:10.1109/tap.2020.3010954
published in IEEE Transactions on Antennas and Propagation 69(2), 1168-1172 (IEEE Antennas & Propagation Society)
arxiv created 2020/05/29 · openalex created_date 2020/06/05 · openalex publication_date 2020/07/27 · arxiv updated 2021/02/24 · openalex updated_date 2026/08/05
Over the past decades, orbital angular momentum (OAM) has attracted great interest due to its helical phase characteristics. It has been proved that plane spiral OAM (PSOAM) waves have a potential in azimuthal pattern reconfiguration. PSOAM waves could be termed as a special form of OAM wave, which avoids the inconsistency of the divergent angles for different OAM waves. However, from a practical point of view, such a PSOAM-based pattern reconfiguration scheme badly needs a compact high-purity multimode PSOAM antenna. In this communication, a compact high-purity eight-mode PSOAM antenna consisting of a coaxial resonator group (CRG) and a rotating parabolic reflector (RPR) is fabricated and measured. The prototype is designed for X-band operation with a bandwidth of 140 MHz, and the simulated efficiencies of the PSOAM modes ±1, ±2, ±3, and ±4 are 88.86%, 92.18%, 90.93%, and 91.25%, respectively. The constructed pattern may have the directivity, vorticity, and nondistortion azimuthal 360° scanning capability. This scheme realizes these pattern characteristics with a simpler algorithm and a lower system complexity compared with the phased array antenna-based pattern reconfiguration scheme. It will have potential in next-generation radar and wireless communication system.