Terahertz beam reconfigurable micro-strip Quasi-Yagi-Uda antenna based on monolayer graphene
Received:September 11, 2019  Revised:December 17, 2019  download
Citation:
Hits: 317
Download times: 167
Author NameAffiliationE-mail
YAO Wen-Long Shanghai Key Lab of Modern Optical Systems, Terahertz Technology Innovation Research Institute, and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for 1299514128@qq.com 
GUO Xu-Guang Shanghai Key Lab of Modern Optical Systems, Terahertz Technology Innovation Research Institute, and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for xgguo_sh@qq.com 
ZHU Yi-Ming Shanghai Key Lab of Modern Optical Systems, Terahertz Technology Innovation Research Institute, and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for ymzhu@usst.edu.cn 
LI Ping Shanghai Key Lab of Modern Optical Systems, Terahertz Technology Innovation Research Institute, and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for 15221338046@qq.com 
Abstract:We propose a beam reconfigurable micro-strip quasi-Yagi-Uda (QYU) antenna operating at terahertz (THz) frequencies. The antenna, on a metal-backed SiO2 substrate, consists of a metallic micro-strip transmission line, a metallic reflector, a metallic half-round micro patch, and three groups of monolayer-graphene-patch directors. Because the conductivities of the graphene patches can be electrically tuned, the radiation direction of the QYU antenna can be dynamically controlled by adjusting the bias voltages applied to the graphene patches. The basic properties and the tunable behaviors of the antenna are systemically simulated and optimized. It has very fast modulation speed and very low return loss. In particular, the numerical results show that the main radiation lobe angle φ (azimuth angle) of the QYU antenna can be swept from 30° to 150° in θ=60° (zenith angle) plane with different configurations of bias voltages applied to the graphene-patch directors. The proposed antenna is very suitable for THz beam reconfigurable applications, such as phased array radar systems.
keywords:Beam reconfigurable antenna  graphene  patch antenna  Yagi-Uda antenna
View Full Text  HTML  View/Add Comment  Download reader

Copyright:《Journal of Infrared And Millimeter Waves》