Reconfigurable graphene-based V-shaped dipole antenna: From quasi-isotropic to directional radiation pattern

Chashmi, Mohsen Jafari; Rezaei, Pejman; Kiani, Narges

doi:10.1016/j.ijleo.2019.04.125

Cited by 50 publications

(12 citation statements)

References 22 publications

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“…4(a). This graph informs us that, as the chemical potential increases, the frequency shifts to higher frequency; which agrees with that reported in [27]. At a value of 0.4 eV, S 11 reaches its maximum value of -63.69 dB at 3.5 THz.…”

Section: Conventional Antennasupporting

confidence: 91%

High-performance tri-band graphene plasmonic microstrip patch antenna using superstrate double-face metamaterial for THz communications

Khaleel

Hamad

Saleh

2022

Journal of Electrical Engineering

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Recently, graphene-patch antennas have been widely used in communication technology, especially in THz applications due to the extraordinary properties of graphene material. Herein, a graphene-based rectangular microstrip patch antenna is designed on an FR4 substrate material (ɛr = 4.3). A single and double-faced superstrate MTM is placed upon the radiating patch for di erent purposes, such as enhancing the overall antenna performance, protecting the patch from environmental jeopardies, and generating a multiband resonance frequency. A single face superstrate triangle SRR unit was used to produce a dual-band frequency at 3.5 and 4.331 THz. The S 11 of the dual-band structure is achieved to be −26.78 dB and −46.25 dB with a bandwidth of 400 GHz and 460 GHz, respectively. The double face superstrate MTM unit cell of the triangle SRR printed on the opposite face gives another resonant frequency, so, triple frequency bands of 2.32, 3.35, and 4.38 THz with a wide impedance bandwidth of 230, 520, and 610 GHz, were generated, respectively. The double-face superstrate MTM not only enhances the antenna performance but also generates another resonant frequency that could be used in the next 6G communications. The proposed antenna is designed and optimized using two commercial 3D full-wave software, CST Microwave Studio and Ansoft HFSS, to validate the results.

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Section: Conventional Antennasupporting

confidence: 91%

High-performance tri-band graphene plasmonic microstrip patch antenna using superstrate double-face metamaterial for THz communications

Khaleel

Hamad

Saleh

2022

Journal of Electrical Engineering

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“…Since we can change the chemical potential of graphene by external bias voltage or chemical doping, graphene is an adjustable metamaterial [14]. We used this graphene capability to design the antennas with performance in far-field and terahertz range central frequency due to control its polarization just by changing the Fermi energy level of the graphene [15][16][17][18].…”

Section: Fig 1 Exfoliation Of Graphite To Create Graphenementioning

confidence: 99%

Multiband Polarization Insensitive and Tunable Terahertz Metamaterial Perfect Absorber Based on The Heterogeneous Structure of Graphene

Razani

Rezaei

2021

Preprint

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In this paper, we present and investigate a multi-band metamaterial perfect absorber (MPA) based on the heterogeneous structure of graphene with Cu and SiO 2 substrates. The top layer of structure consist of one graphene disk at the center and four graphene solid triangle with semicircular cuts on them that surround the central disk. This heterogeneous structure causes us to achieve 97.06%, 94.71%, 99.7% and 99.5% perfect absorptions peaks at 28239.7 nm, 31048.9 nm, 50898.6 nm and 70689.1 nm, respectively. The absorption mechanism based on electric fields has been investigated. We can shift the wavelength of absorption peaks to our required wavelength by changing the Fermi level (µc) of graphene. Two absorption peaks of this absorber remain unchanged in different incident angle. In addition, very important point about this structure is that it is not sensitive to polarization and this feature makes the proposed absorber very suitable for applications such as imaging, filtering, sensing and detecting applications.

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“…Although doing the suggested way of solving the multipath effect is long and tiresome, the study of Castro, Dopazo, Alvarez, et al proposed a two-ray model. The two-ray model describes the scenario at hand, then validate the created model using data acquired through different frequencies that the model is tested upon, and study the data to see if it could provide knowledge to the researchers as to the effect of reflection of signals from the waves with respect to what is measured on the data of the antenna [13,14,15].…”

Section: Review Of Related Literaturementioning

confidence: 99%

Analysis of the Various Properties of an Antenna Array’s Radiation

2020

IJETER

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As technological innovations improve over time, antennas have become an inherent piece of our everyday lives and it is essential for individuals to understand how data is moved through these devices. There are different methods of deciding how energy can be transmitted by antennas in an efficient manner, and not all things are seen on the antennas themselves, as there are a few issues that may emerge from the transmission cables that they are associated with too. A common method of deciding how an antenna can transmit signals of energy is through the analysis of its radiation pattern. The radiation pattern of an antenna is able to determine how energy is radiated or data is propagated by a particular antenna. This analysis will focus on understanding the graphs of radiation patterns, beam scanning, patterns of arrays, and other types of graphs. Understanding all of these concepts are important in order to have the ability to effectively utilize antennas such as being able to maximize the amount of distance possible when correctly positioned and also having the ability to boost signals from other devices.

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Reconfigurable graphene-based V-shaped dipole antenna: From quasi-isotropic to directional radiation pattern

Cited by 50 publications

References 22 publications

High-performance tri-band graphene plasmonic microstrip patch antenna using superstrate double-face metamaterial for THz communications

High-performance tri-band graphene plasmonic microstrip patch antenna using superstrate double-face metamaterial for THz communications

Multiband Polarization Insensitive and Tunable Terahertz Metamaterial Perfect Absorber Based on The Heterogeneous Structure of Graphene

Analysis of the Various Properties of an Antenna Array’s Radiation

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