This paper proposes a novel metal-graphene plasmonic antenna over a Si/SiO2 substrate, working in terahertz frequency band. Novelty of the work lies in the use of metal and graphene as a patch antenna, as this combination enhances the gain & the radiation efficiency of the whole structure. Besides the analysis provides detailing of graphene and its conductivity modelling using MATLAB. The antenna is analyzed using FDTD based CST software, conductivity of graphene used in CST is verified with the conductivity achieved using MATLAB. Further, a 3-element Multiple Input and Multiple Output (MIMO) antenna system using same single element antenna, is designed & analyzed. The metal-graphene hybrid patch antenna provides maximum directivity around 5.8 dBi, maximum gain around 5 dBi, and high radiation efficiency (approx. 80%) at resonant frequency of 1.8 THz. Besides, the 3-element MIMO antenna provides radiation efficiency around 77%, with directivity around 5 dB & diversity gain of around 10 dBi. The proposed metal-graphene hybrid MIMO patch antenna has the potential to be used in advanced THz communication systems.

中文翻译：

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用于太赫兹通信的频率可重构金属-石墨烯混合 MIMO 贴片天线

本文提出了一种在 Si/SiO 上的新型金属-石墨烯等离子体天线2基板，工作在太赫兹频段。这项工作的新颖之处在于使用金属和石墨烯作为贴片天线，因为这种组合提高了整个结构的增益和辐射效率。此外，该分析还提供了使用 MATLAB 对石墨烯及其电导率建模的详细信息。使用基于 FDTD 的 CST 软件分析天线，使用 MATLAB 验证 CST 中使用的石墨烯的电导率。此外，设计和分析了使用相同单元素天线的三元素多输入多输出 (MIMO) 天线系统。金属-石墨烯混合贴片天线在 1.8 THz 的谐振频率下提供约 5.8 dBi 的最大方向性、约 5 dBi 的最大增益和高辐射效率（约 80%）。除了，3 元件 MIMO 天线提供约 77% 的辐射效率，方向性约 5 dB，分集增益约 10 dBi。所提出的金属-石墨烯混合 MIMO 贴片天线有可能用于先进的太赫兹通信系统。