An ultra-wideband pattern reconflgurable antenna based on graphene coating  

作　　者：姜彦南 袁锐 高喜 王娇 李思敏 林诒玉 

机构地区：[1]Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin 541004, China [2]Key Laboratory of Cognitive Radio and Information Processing (Ministry of Education), Guilin University of Electronic Technology, Guilin 541004, China [3]Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin 541004, China

出　　处：《Chinese Physics B》2016年第11期625-631,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61661012,61461016,and 61361005);the Natural Science Foundation of Guangxi,China(Grant Nos.2015GXNSFBB139003 and 2014GXNSFAA118283);Program for Innovation Research Team of Guilin University of Electromagnetic Technology,China;the Dean Project of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,China

摘　　要：An ultra-wideband pattern reconfigurable antenna is proposed.The antenna is a dielectric coaxial hollow monopole with a cylindrical graphene-based impedance surface coating.It consists of a graphene sheet coated onto the inner surface of a cylindrical substrate and a set of independent polysilicon DC gating pads mounted on the outside of the cylindrical substrate.By changing the DC bias voltages to the different gating pads,the surface impedance of the graphene coating can be freely controlled.Due to the tunability of graphene＇s surface impedance,the radiation pattern of the proposed antenna can be reconfigured.A transmission line method is used to illustrate the physical mechanism of the proposed antenna.The results show that the proposed antenna can reconfigure its radiation pattern in the omnidirectional mode with the relative bandwidth of 58.5% and the directional mode over the entire azimuth plane with the relative bandwidth of 67%.An ultra-wideband pattern reconfigurable antenna is proposed.The antenna is a dielectric coaxial hollow monopole with a cylindrical graphene-based impedance surface coating.It consists of a graphene sheet coated onto the inner surface of a cylindrical substrate and a set of independent polysilicon DC gating pads mounted on the outside of the cylindrical substrate.By changing the DC bias voltages to the different gating pads,the surface impedance of the graphene coating can be freely controlled.Due to the tunability of graphene＇s surface impedance,the radiation pattern of the proposed antenna can be reconfigured.A transmission line method is used to illustrate the physical mechanism of the proposed antenna.The results show that the proposed antenna can reconfigure its radiation pattern in the omnidirectional mode with the relative bandwidth of 58.5% and the directional mode over the entire azimuth plane with the relative bandwidth of 67%.

关 键 词：wideband antenna impedance bandwidth directional illustrate hollow dielectric coated outside 

分 类 号：TN820[电子电信—信息与通信工程]