This paper presents an electronic reconfigurable pattern control using artificial magnetic conductor (AMC) graphene surfaces for terahertz (THz) applications. The proposed graphene AMC surface consists of modified star-shaped slotted graphene sheets printed on the top and bottom sides of dielectric substrate. Square graphene ring with 1 µm width is used to control the ground plane size of the AMC-surface. The AMC-cell operates at 1.4 THz with wide frequency varying range from 1.05 to 2.2 THz for µc changed from 0.1 to 2 eV. The radiated waves from a rectangular dipole antenna backed by graphene AMC surface is deflected from the broadside direction to the end-fire direction. According to the number of unbiased graphene ring rows Nun the beam direction is controlled. The effective area of the proposed graphene-based AMC reflector is increased or decreased through operating these rings, respectively. Biasing graphene means applying a DC voltage value across it corresponding to µc = 2 eV, while corresponding to µc = 0 eV. Different AMC surfaces arrangements are investigated. For 17 × 17 AMC unit-cell, the peak gain direction in the y–z plane is θ = 0° for Nun= 0, θ = ± 16° for Nun= 4 rows, θ = ± 65° for Nun= 6 rows, and θ = ± 90° for Nun= 8 rows. The HPBW is 232°, 236°, and 239° for Nun= 4, 6, and 8 unbiased rows, respectively.

中文翻译：

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使用石墨烯人造磁导体表面进行电子束切换

本文介绍了一种使用人造磁导体 (AMC) 石墨烯表面进行太赫兹 (THz) 应用的电子可重构图案控制。所提出的石墨烯 AMC 表面由印刷在电介质基板的顶部和底部的改性星形开槽石墨烯片组成。宽度为 1 µm 的方形石墨烯环用于控制 AMC 表面的接地平面尺寸。AMC 单元以 1.4 THz 的频率运行，频率变化范围从 1.05 到 2.2 THz，μc 从 0.1 到 2 eV。来自石墨烯 AMC 表面支持的矩形偶极子天线的辐射波从宽边方向偏转到端射方向。根据无偏石墨烯环行Nun的数量控制光束方向。所提出的基于石墨烯的 AMC 反射器的有效面积分别通过操作这些环来增加或减少。偏置石墨烯意味着在其上施加 DC 电压值，对应于 µc = 2 eV，而对应于 µc = 0 eV。研究了不同的 AMC 表面排列。对于 17 × 17 AMC 晶胞，y-z 平面中的峰值增益方向为 θ = 0° Nun= 0，θ = ± 16° Nun= 4 行，θ = ± 65° Nun= 6 行, 和 θ = ± 90° 对于 Nun= 8 行。对于 Nun= 4、6 和 8 个无偏行，HPBW 分别为 232°、236° 和 239°。y-z 平面中的峰值增益方向为 θ = 0°，Nun= 0，θ = ± 16° Nun= 4 行，θ = ± 65° Nun= 6 行，θ = ± 90° Nun = 8 行。对于 Nun= 4、6 和 8 个无偏行，HPBW 分别为 232°、236° 和 239°。y-z 平面中的峰值增益方向为 θ = 0°，Nun= 0，θ = ± 16° Nun= 4 行，θ = ± 65° Nun= 6 行，θ = ± 90° Nun = 8 行。对于 Nun= 4、6 和 8 个无偏行，HPBW 分别为 232°、236° 和 239°。