The Array Fractal Graphene Antenna Used for Mobile Digital Television

Lin, Bin; Liu, Zetai; Zhang, Ying; Lin, Zhipeng; Shaodong, Shen; Zheng, Ping; Wei, Xinyu

doi:10.5220/0006972004230426

Cited by 2 publications

(2 citation statements)

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“…Graphene is carbon-based material, it is a thin twodimensional single layer of carbon atoms. Graphene has many properties in terms of mechanical strength, mobility, optical transparency, electrical and thermal conductivity [13]. The graphene electrical properties can be tuned by applying suitable external DC voltage.…”

Section: Properties Of Graphenementioning

confidence: 99%

Manipulation of Electromagnetic Waves Via Graphene-Based Coding Metamaterials for Terahertz Applications

Saleeb,

Hassan,

El-Rabaie

et al. 2024

Journal of Advanced Engineering Trends

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This paper is concerned with the manipulation of electromagnetic waves in the Terahertz range using graphene. Graphene has the great advantage that its conductivity can be controlled via an electric bias. A unit cell constructed from two square rings enclosing a square patch made of graphene was simulated using HFSS that gives a reflection phase of 0 or π according to the bias. Scattering from a coding metamaterial in the form of a square matrix of 8x8 unit cells was analyzed. A plane wave incident normally on the coding metamaterial is scattered and formed two or four main beams according to the arrangement of unit cells. The unit cells are arranged as groups. The group may be a column or square. The groups alternate as 1x1, which means one group gives zero reflection phase and the next group gives π phase. Arrangements 1x1, 2x2, and 4x4 were studied. The beamwidth and direction of propagation of the scattered beams depend upon the arrangement of the groups (1x1, 2x2, or 4x4). The positions of scattered beamwidths in azimuth are fixed, they do not change with arrangement of groups. The elevation angle of the beams change from large value for 1x1 to smaller value for 4x4. In the limit when all the cells become of the same type , the elevation angle becomes zero and we have only one beam normal to the structure.

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Section: Properties Of Graphenementioning

confidence: 99%

Manipulation of Electromagnetic Waves Via Graphene-Based Coding Metamaterials for Terahertz Applications

Saleeb,

Hassan,

El-Rabaie

et al. 2024

Journal of Advanced Engineering Trends

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“…Graphene supports a plasmonic propagation at THz spectrum that leads to extremely interesting properties for practical antennas applications [7][8]. Graphene has good properties in terms of mechanical strength, mobility, optical transparency, electrical and thermal conductivity [10,11]. Different reflect array antennas based on graphene [3,8,14,16] has been studied.…”

Section: Introductionmentioning

confidence: 99%

Terahertz Reflectarray Antenna with a Square Patch Surrounded by Two Concentric Square Rings as a Unit Cell

Hassan

El-Rabie

Elsharkawy

et al. 2023

Menoufia Journal of Electronic Engineering Research

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Graphene is being used as a patch as it possesses a number of desirable electromagnetic and mechanical properties that assist in providing flexible and reconfigurable antenna structure. A graphene reflective unit cell is examined to demonstrate that the reflection coefficient can be controlled by changing the chemical potential and size of the graphene patch. The phase compensation of the reflected waves is achieved by patches with different sizes. Reflection coefficient phase variations for 0°-525° with a variable slope are obtained for different graphene conductivities. A graphene-based reflectarray antenna is proposed. A reflect array with dimensions of 𝟐𝟎 𝛌 𝐱 𝟐𝟎 𝛌 that operates at 1.6 THz is analyzed. The reflectarray is composed of 40x40 unit cells with 𝛌 𝟐 ⁄ 𝒙 𝛌 𝟐 ⁄ for each unit cell size. They are placed upon silicon dioxide substrate. A horn antenna is used as a feed. The focal-length-to-diameter (F/D) ratio is equal to one. A maximum gain of 20.7, 13.6, and 21.4 dBi are obtained at 1.4, 1.8, and 1.6 THz respectively.

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The Array Fractal Graphene Antenna Used for Mobile Digital Television

Cited by 2 publications

References 0 publications

Manipulation of Electromagnetic Waves Via Graphene-Based Coding Metamaterials for Terahertz Applications

Manipulation of Electromagnetic Waves Via Graphene-Based Coding Metamaterials for Terahertz Applications

Terahertz Reflectarray Antenna with a Square Patch Surrounded by Two Concentric Square Rings as a Unit Cell

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