Abstract-Reconfigurable Terahertz Leaky-Wave Antenna Using Graphene-Based High-Impedance Surface

Author(s) 

Xu-Chen Wang ; Centre for Opt. & EM Res., Zhejiang Univ., Hangzhou, China ; Wen-Sheng Zhao ; Jun Hu ; Wen-Yan Yin,
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6937199&filter%3DAND%28p_IS_Number%3A7004754%29

The concept of graphene-based two-dimensional leaky-wave antenna (LWA), allowing both frequency tuning and beam steering in the terahertz band, is proposed in this paper. In its design, a graphene sheet is used as a tuning part of the high-impedance surface (HIS) that acts as the ground plane of such 2-D LWA. It is shown that, by adjusting the graphene conductivity, the reflection phase of the HIS can be altered effectively, thus controlling the resonant frequency of the 2-D LWA over a broad band. In addition, a flexible adjustment of its pointing direction can be achieved over a wide range, while keeping the operating frequency fixed. Transmission-line methods are used to accurately predict the antenna reconfigurable characteristics, which are further verified by means of commercial full-wave analysis tools.