A Reconfigurable Graphene Reflectarray for Generation of Vortex THz Waves

被引：69
|
作者：
Chang, Zhuang [1 ]
You, Ben [1 ]
Wu, Lin-Sheng [1 ]
Tang, Min [1 ]
Zhang, Yao-Ping [1 ]
Mao, Jun-Fa [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Key Lab, Minist Educ Design & Electromagnet Compatibil Hig, Shanghai 200240, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2016年 / 15卷
关键词：
Graphene; reconfiguration; reflectarray antenna; vortex THz wave; ORBITAL ANGULAR-MOMENTUM; ANTENNA;
D O I：
10.1109/LAWP.2016.2519545
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：
A reconfigurable graphene reflectarray is proposed for the generation of vortex radio waves at THz. First, a simple sectored circular reflective surface model with a plane wave at normal incidence is constructed to illustrate how vortex radio waves can be generated. Then, a graphene reflective cell is examined to demonstrate that the reflection coefficient can be controlled by changing the chemical potential and size of the graphene patch. Next, the sectored circular reflective surface is realized with the graphene reflective cells that are properly sized, arranged, and biased to satisfy the required reflection coefficients for various modes of vortex radio waves. Finally, the graphene reflectarray is excited with a horn antenna, showing from simulations that it can be dynamically reconfigured to generate the 0, +/- 1, and +/- 2 modes of vortex radio waves at 1.6 THz.
引用
收藏
页码：1537 / 1540
页数：4
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