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Electronic beam switching using graphene artificial magnetic conductor surfaces

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Abstract

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.

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Authors and Affiliations

  1. Faculty of Electronic Engineering, Menoufia University, Menouf, Egypt

    Hend Abd El-Azem Malhat & Saber Helmy Zainud-Deen

  2. Faculty of Engineering and Technology, Badr University in Cairo, Cairo, Egypt

    Ahmed Mosad Mabrouk, Hader El-Hmaily & Saber Helmy Zainud-Deen

  3. Faculty of Engineering, Minia University, Elminia, Egypt

    Hesham F. Hamed & Ahmed Abd El Monem Ibrahim

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  1. Hend Abd El-Azem Malhat
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  2. Ahmed Mosad Mabrouk
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  3. Hader El-Hmaily
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  4. Hesham F. Hamed
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  5. Saber Helmy Zainud-Deen
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  6. Ahmed Abd El Monem Ibrahim
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Correspondence to Hend Abd El-Azem Malhat.

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Malhat, H.AA., Mabrouk, A.M., El-Hmaily, H. et al. Electronic beam switching using graphene artificial magnetic conductor surfaces. Opt Quant Electron 52, 357 (2020). https://doi.org/10.1007/s11082-020-02475-6

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