High-Performance Graphene Patch Antenna with Superstrate Cover for Terahertz Band Application

Khan, Md. Abdul Kaium; Ullah, Md Ibrahim; Kabir, Rifat; Alim, Mohammad Abdul

doi:10.1007/s11468-020-01200-z

Cited by 49 publications

(21 citation statements)

References 36 publications

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“…4 shows the phase variation diagram of optimized cell in terms of various scales of the metallic section of the cell considering desired frequencies between 1.1 THz and 1.5 THz. The optimized structure meets condition (5) whereas the corresponding bandwidth is 30.76%. Moreover, the maximum phase variation is 738 at 1.5 THz and more than 600 at other frequencies.…”

Section: -Simulation Results Of the Optimized Cellmentioning

confidence: 93%

“…If the condition ( 4) is satisfied, the structure has acceptable characteristic in the frequency range between 1 THz and 1.4 THz. In the case that none of equations ( 3) and ( 4) are met, equation (5) has been examined and this process continues similar to the previous two conditions until the appropriate answer is obtained for the fitness function.…”

Section: The Absolute Value Kmmentioning

confidence: 99%

“…One of the solutions for increasing data rate in new generation of telecommunications is the use of higher frequencies, especially the terahertz band. Moreover, utilizing THz band has additional applications including multimedia broadcasting [4,5], wireless technology [2,6], and medical imaging [7,8]. One of the main challenges of utilizing THz regime for communications is high attenuation rate of THz waves in the atmosphere.…”

Section: -Introductionmentioning

confidence: 99%

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Design and optimization of a wideband metasurface for utilization in a highly efficient terahertz reflectarray antenna

Sharifi¹,

Basiri²,

Zareian‐Jahromi³

2021

Preprint

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In this manuscript, two wideband single layer reflectarray antennas are designed utilizing an optimization-based metasurface in terahertz (THz) regime. It is demanded to design a metasurface with wide phase variation range in a broad frequency region of terahertz band. The proposed metasurface is designed based on Random Hill Climbing optimization algorithm whereas a multiobjective fitness function is defined to consider the desired characteristics. A provided link between Matlab and HFSS softwares is utilized to define and simulate various metasurfaces. The finalized cell has considerable wide phase variation (≥ 600˚) and notable bandwidth of 30.76% (1.1–1.5 THz) whereas the mean value of magnitude variation of reflection coefficient is -0.42dB. Two square and circular metasurfaces are designed based on the optimized cell and illuminated using a THz feeding horn antenna. The angles of incident and reflected waves are considered equal to zero. The simulation results confirm 3-dB gain bandwidths of 20.3% and 20.4% for square and circular reflectors, respectively. Moreover, the considerable efficiencies of 45.67% and 46.27% are achieved for square and circular arrays, consequently. The maximum gain of square array with 361 elements is 25.9dB whereas it is equal to 24.9dB for circular metasurface including 277 unit cells.

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Section: -Simulation Results Of the Optimized Cellmentioning

confidence: 93%

Section: The Absolute Value Kmmentioning

confidence: 99%

Section: -Introductionmentioning

confidence: 99%

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Design and optimization of a wideband metasurface for utilization in a highly efficient terahertz reflectarray antenna

Sharifi¹,

Basiri²,

Zareian‐Jahromi³

2021

Preprint

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“…Up to now, numerous types of nano-antennas have been proposed such as circular hybrid plasmonic 18 , Yagi-Uda 19 , dipole-loop 20 , graphene patch 21 , and phased array 22 antennas. However, to the best of our knowledge, a few efforts have been done to investigate optical nano-antennas with multibeam radiation pattern.…”

Section: Introductionmentioning

confidence: 99%

Smart optical cross dipole nanoantenna with multibeam pattern

Moshiri

Nozhat

2021

Sci Rep

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In this paper, an optical smart multibeam cross dipole nano-antenna has been proposed by combining the absorption characteristic of graphene and applying different arrangements of directors. By introducing a cross dipole nano-antenna with two V-shaped coupled elements, the maximum directivity of 8.79 dBi has been obtained for unidirectional radiation pattern. Also, by applying various arrangements of circular sectors as director, different types of radiation pattern such as bi- and quad-directional have been attained with directivities of 8.63 and 8.42 dBi, respectively, at the wavelength of 1550 nm. The maximum absorption power of graphene can be tuned by choosing an appropriate chemical potential. Therefore, the radiation beam of the proposed multibeam cross dipole nano-antenna has been controlled dynamically by applying a monolayer graphene. By choosing a suitable chemical potential of graphene for each arm of the suggested cross dipole nano-antenna without the director, the unidirectional radiation pattern shifts ± 13° at the wavelength of 1550 nm. Also, for the multibeam nano-antenna with different arrangements of directors, the bi- and quad-directional radiation patterns have been smartly modified to uni- and bi-directional ones with the directivities of 10.1 and 9.54 dBi, respectively. It is because of the graphene performance as an absorptive or transparent element for different chemical potentials. This feature helps us to create a multipath wireless link with the capability to control the accessibility of each receiver.

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“…Abdul et al 10 designed the graphene‐based THz patch antenna which operated in the frequency of 7 THz. This THz antenna produced the output of −75.6 dB return loss to a gain of 7.3 dB.…”

Section: Introductionmentioning

confidence: 99%

Design of slotted patch antenna based on photonic crystal for wireless communication

Britto¹,

Danasegaran²,

Johnson³

2020

Int J Communication

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SummaryNowadays, the wireless communication is improved in numerous ranges, and the use of the high speed of data rate in the communication systems is needed. The standing problem of high‐performance planar antenna is reduced by the recently developed artificial dielectric called photonic crystal, which is used to control and manipulate the optical property of light. This paper addresses the slotted tube antenna structure, and the investigation is done by the concept of triangular lattice structure based on the photonic crystal. This utility enhances the return loss of −57.81 dB and the voltage standing wave ratio (VSWR) of 1.002 at 2.37 THz operating frequencies. The increase in hole radius provides the shifting in zero dispersion point towards the shorter wavelength that helps for faster data rate transmission applications. Further, to characterize the model of the proposed antenna, the optimal value of the air hole, lattice constant value between holes and the thickness of the slot are found and the related parameters of such antenna are studied with the support of simulation software CST microwave studio.

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High-Performance Graphene Patch Antenna with Superstrate Cover for Terahertz Band Application

Cited by 49 publications

References 36 publications

Design and optimization of a wideband metasurface for utilization in a highly efficient terahertz reflectarray antenna

Design and optimization of a wideband metasurface for utilization in a highly efficient terahertz reflectarray antenna

Smart optical cross dipole nanoantenna with multibeam pattern

Design of slotted patch antenna based on photonic crystal for wireless communication

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