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具有360°波束连续转向与控制功能的多功能太赫兹石墨烯天线。

Multifunctional THz Graphene Antenna with 360 Continuous -Steering and -Control of Beam.

作者信息

Dmitriev Victor, de Oliveira Rodrigo M S, Paiva Rodrigo R, Rodrigues Nilton R N M

机构信息

Graduate Program in Electrical Engineering (PPGEE), Institute of Technology (ITEC), Federal University of Pará (UFPA), Rua Augusto Corrêa, 01, Belém 66075-110, PA, Brazil.

出版信息

Sensors (Basel). 2023 Aug 3;23(15):6900. doi: 10.3390/s23156900.

DOI:10.3390/s23156900
PMID:37571680
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10422558/
Abstract

A novel graphene antenna composed of a graphene dipole and four auxiliary graphene sheets oriented at 90∘ to each other is proposed and analyzed. The sheets play the role of reflectors. A detailed group-theoretical analysis of symmetry properties of the discussed antennas has been completed. Through electric field control of the chemical potentials of the graphene elements, the antenna can provide a quasi-omnidirectional diagram, a one- or two-directional beam regime, dynamic control of the beam width and, due to the vertical orientation of the dipole with respect to the base substrate, a 360∘ beam steering in the azimuth plane. An additional graphene layer on the base permits control of the radiation pattern in the θ-direction. Radiation patterns in different working states of the antenna are considered using symmetry arguments. We discuss the antenna parameters such as input reflection coefficient, total efficiency, front-to-back ratio, and gain. An equivalent circuit of the antenna is suggested. The proposed antenna operates at frequencies between 1.75 THz and 2.03 THz. Depending on the active regime defined by the chemical potentials set on the antenna graphene elements, the maximum gain varies from 0.86 to 1.63.

摘要

提出并分析了一种由石墨烯偶极子和四个相互成90°角的辅助石墨烯片组成的新型石墨烯天线。这些片起到反射器的作用。已完成对所讨论天线对称性的详细群论分析。通过对石墨烯元件化学势的电场控制，该天线可提供准全向方向图、单向或双向波束模式、波束宽度的动态控制，并且由于偶极子相对于基底的垂直取向，可在方位平面内实现360°波束转向。基底上的附加石墨烯层允许控制θ方向上的辐射方向图。利用对称性论据考虑了天线不同工作状态下的辐射方向图。我们讨论了天线参数，如输入反射系数、总效率、前后比和增益。提出了天线的等效电路。所提出的天线工作频率在1.75太赫兹至2.03太赫兹之间。根据天线石墨烯元件上设置的化学势所定义的有源模式，最大增益在0.86至1.63之间变化。

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本文引用的文献

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An ultra-wideband orthogonal-beam directional graphene-based antenna for THz wireless systems.一种用于太赫兹无线系统的超宽带正交波束定向石墨烯天线。
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