Broadband Quasi-continuous Metasurface for OAM Generation

被引：0
作者：
Yang, Ling-Jun [1 ]
Sun, Sheng [1 ]
Sha, Wei E., I [2 ]
机构：
[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 611731, Sichuan, Peoples R China
[2] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China
来源：
2020 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION AND NORTH AMERICAN RADIO SCIENCE MEETING | 2020年
基金：
中国国家自然科学基金;
关键词：
Orbital angular momentum; Pancharatnam-Berry phase; quasi-continuous; mode purity;
D O I：
10.1109/IEEECONF35879.2020.9329749
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The purpose of this study is to generate a broadband high-performance vortex wave. By using the waveguide theory and the grating vectors model, a broadband quasi-continuous metasurface is proposed to generate the l = +/- 2 vortex beams with a measuring mode purity of 0.68 operating from 9 GHz to 19 GHz. In compare with previous designs, this metasurface provide a significant bandwidth improvement with continuous upper surface feature. The measured far-field patterns have a good agreement with those obtained from the simulation. This work offers a useful route of producing high-purity orbital angular momentum waves.
引用
收藏
页码：923 / 924
页数：2
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