Humidity effect on electrical properties of graphene oxide back-to-back Schottky diode

Rahman, Shaharin Fadzli Abd; Salleh, Nurul Anati; Abidin, Mastura Shafinaz Zainal; Nawabjan, Amirjan

doi:10.12928/telkomnika.v17i5.12800

Cited by 6 publications

(5 citation statements)

References 26 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…𝜀 𝑜 𝜀𝑉 𝑏 𝑑𝑞 (5) where εo is the free space permittivity of (F/m), Vb = voltage bias (V), d is the height of the dielectric material (m) and ε represent the dielectric material relative permittivity between the graphene sheet and back gate material. The equation for the dispersion of the SPP present in (6): = 𝑅 𝑆 + 𝑗 𝑋 𝑆 (7) the propagation constant of SPP wave can be given by:…”

Section: 𝑛 =mentioning

confidence: 99%

“…Graphene is used in wide range of applications including mechanical, thermal, optical and electrical applications, [1][2][3]. Also, the graphene can be used in fabrication of high-speed field effect transistor [4] or Schottky diode [5]. The graphene plasmonic behavior can be used to miniaturization process for the antennas and other applications.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

UWB THz plasmonic microstrip antenna based on graphene

2020

View full text Add to dashboard Cite

This paper proposes design and investigates of graphene based plasmonic microstrip antenna for terahertz high speed communication and application systems 0.1-20 THz. The proposed antenna structure composed of graphenebased rectangular patch and transmission line mounted on a grounded silicone dioxide substrate. SPP (Surface Plasmon Polariton) waves that appear in graphene at THz band is analyzed. The proposed antenna simulation was done by using numerical method CST program. The simulation results show the scattering parameter S11 less than -10 dB at frequency band (0.1-20) THz. Also, the presented antenna system has a good gain along the frequency band.

show abstract

Section: 𝑛 =mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UWB THz plasmonic microstrip antenna based on graphene

2020

View full text Add to dashboard Cite

show abstract

“…However, Terahertz wireless communication frequency spectrum faces challenges, such as attenuation, high absorptions, path loss and multipath fading [9]. Therefore, the MIMO system is an excellent choice to handle these issues due to its modified chemical potential, improving the wireless communication system's capacity and efficiency [10]. The central technology for 5G communication has been recognized as MIMO technology because it allows systems to reach peak data speeds and improve  ISSN: 2302-9285 spectrum efficiency.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable graphene-based multi-input multi-output antenna design for THz applications

Hikmat

Abdulnabi

2023

Bulletin EEI

View full text Add to dashboard Cite

This paper presents a compact graphene-based multi-input multi-output (MIMO) antenna for wireless communications operating in frequency band (0.1-10) THz. This work has been performed with four ports microstrip antennas based on 37×88 μm² a silicon dioxide (Sio₂) substrate and copper on the ground layer, with high isolation by a series of unit cells of graphene selected between adjacent patches to reduce the transmission coefficient and antenna size. Graphene's chemical potential will change by changing the connected DC voltage, leading to bandwidth and resonant frequency variation. The simulation has a reflection coefficient is less than -10 dB at (4.5-10) THz of the frequency scale, mutual coupling (-15 dB), and the gain from (4.7-9) THz is (1.6-6.7254) dB. This paper aims to provide wideband, efficient and reconfigurable with simple graphene-based MIMO antenna for THz applications.

show abstract

“…This metal property reduces the radiation effectiveness of metallic antennas at THz frequencies [4]. Small antennas have a substantially reduced radiation efficiency at 1 THz [5] due to the high surface resistance of metallic traces, as determined by computer research. This reduced conductivity results from grain boundary scattering, surface scattering, and surface roughness [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Toothed log periodic graphene-based antenna design for THz applications

Rasheed

Abdulnabi

2022

Bulletin EEI

View full text Add to dashboard Cite

This paper proposes a graphene-based toothed log-periodic antenna for the THz frequency region (0.1–10) THz applications. By adjusting the applied DC voltage on the graphene, the antenna's properties, such as bandwidth, radiation pattern operational frequency ranges have been shifted. The chemical potential, surface conductivity, and surface impedance of the graphene are affected by changing applied DC voltage and hence a reconfigurable antenna has been resulting. The suggested antenna's radiating element is from a graphene material and has log-periodic shape, with 50 ohm feed line placed on the grounded silicon dioxide substrate, 1 µm-thick layers of silicon crystalline and alumina on top of the substrate. The antenna is simulated by the computer simulation technology (CST) 2020 software program. The resultant bandwidth (7-10) TH has a return loss of less than -10 when the chemical potential of graphene is 1eV.

show abstract

Humidity effect on electrical properties of graphene oxide back-to-back Schottky diode

Cited by 6 publications

References 26 publications

UWB THz plasmonic microstrip antenna based on graphene

UWB THz plasmonic microstrip antenna based on graphene

Reconfigurable graphene-based multi-input multi-output antenna design for THz applications

Toothed log periodic graphene-based antenna design for THz applications

Contact Info

Product

Resources

About