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1.天津大学光电信息技术教育部重点实验室,天津 300072
2.崂山实验室,山东青岛 266234
Received:28 October 2022,
Revised:2023-11-23,
Published:25 May 2024
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刘博文,徐航,张雅婷,等. 基于石墨烯片的频率可调太赫兹天线[J]. 电子学报,2024,52(05):1421-1431.
LIU Bo-wen, XU Hang, ZHANG Ya-ting, et al. Frequency Tunable Terahertz Antenna Based on Graphene Sheet[J]. Acta Electronica Sinica, 2024, 52(05): 1421-1431.
刘博文,徐航,张雅婷,等. 基于石墨烯片的频率可调太赫兹天线[J]. 电子学报,2024,52(05):1421-1431. DOI:10.12263/DZXB.20221218
LIU Bo-wen, XU Hang, ZHANG Ya-ting, et al. Frequency Tunable Terahertz Antenna Based on Graphene Sheet[J]. Acta Electronica Sinica, 2024, 52(05): 1421-1431. DOI:10.12263/DZXB.20221218
本文设计了一种基于石墨烯片的频率可调太赫兹天线,采用了折叠缝隙结构并使用共面波导馈电方式,以更好地实现阻抗匹配.通过调控在缝隙之间添加的4个石墨烯片的电导率,改变缝隙天线的等效长度,使天线在两种不同工作模式下的谐振频率分别为230.5 GHz和270.5 GHz.除此之外,在天线下方加载了方形封闭谐振环(Closed-Ring Resonator,CRR)构成的超表面,并使其谐振频率与天线的谐振频率匹配,将
z
轴负方向的辐射进行反射,使天线在两种工作模式下的增益提高至5.41 dBi和7.63 dBi,与无反射结构时相比分别增长2.48 dBi和3.55 dBi.
In this paper
we propose a reconfigurable antenna using graphene which can work in terahertz band. The antenna use folded slot structure and coplanar waveguide to achieve impedance matching easily. By adjusting the conductivity of the four graphene sheets added between the slots
we can change the resonant frequencies of the antenna from 230.5 GHz to 270.5 GHz. In addition
a metasurface consisted of square closed-ring resonators (CRR) is under the antenna used to increase the gain of antenna. Because of the reflection of metasurface
the gain of antenna in two work mode increases 2.48 dBi and 3.55 dBi respectively.
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