Graphene-Based Photoconductive Antenna Structures for Directional Terahertz Emission

Nissiyah, G. Jemima; Madhan, M. Ganesh

doi:10.1007/s11468-018-0871-7

Cited by 19 publications

(8 citation statements)

References 32 publications

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“…Metals used in microwave antennas suffer from a degradation of their conductivity and a reduction of the skin depth in them at frequencies in the THz range. The former can lead to low radiation efficiencies, while the latter causes high propagation losses [17,149]. Graphene is commonly envisioned to help overcome these challenges and enable wireless communication at the nanoscale.…”

Section: Terahertz Antennasmentioning

confidence: 99%

“…Graphene's dynamic tunability can be used to reconfigure several antenna properties. These include the resonance frequency [17,24,114], directivity [85,149], and radiation pattern [85,116]. All simulation models of THz antennas have been based on the Drude conductivity model introduced in section 2.2.…”

Section: Terahertz Antennasmentioning

confidence: 99%

“…A critical consideration in designing graphene THz antennas is their high input impedance resulting from their very small thickness. Researchers suggest combining antennas with photomixers to realize Thz emissions [24,149,151]. This approach is one of many so-called photoconductive antennas (PCA).…”

Section: Thz Resonant Antennasmentioning

confidence: 99%

“…Graphene-based Yagi-Uda antennas [85,117,149,[160][161][162] are a common research topic for various high-gain applications. The main focus herein lies in the THz frequency range where the plasmonic effects occur, and dynamic tunability is facilitated.…”

Section: Yagi-uda Antennasmentioning

confidence: 99%

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Review of graphene for the generation, manipulation, and detection of electromagnetic fields from microwave to terahertz

et al. 2022

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Graphene has attracted considerable attention ever since the discovery of its unprecedented properties, including its extraordinary and tunable electronic and optical properties. In particular, applications within the microwave to terahertz frequency spectrum can benefit from graphene’s high electrical conductivity, mechanical flexibility and robustness, transparency, support of surface-plasmon-polaritons, and the possibility of dynamic tunability with direct current to light sources. This review aims to provide an in-depth analysis of current trends, challenges, and prospects within the research areas of generating, manipulating, and detecting electromagnetic fields using graphene-based devices that operate from microwave to terahertz frequencies. The properties of and models describing graphene are reviewed first, notably those of importance to electromagnetic applications. State-of-the-art graphene-based antennas, such as resonant and leaky-wave antennas, are discussed next. A critical evaluation of the performance and limitations within each particular technology is given. Graphene-based metasurfaces and devices used to manipulate electromagnetic fields, e.g., wavefront engineering, are then examined. Lastly, the state-of-the-art of detecting electromagnetic fields using graphene-based devices is discussed.

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Section: Terahertz Antennasmentioning

confidence: 99%

Section: Terahertz Antennasmentioning

confidence: 99%

Section: Thz Resonant Antennasmentioning

confidence: 99%

Section: Yagi-uda Antennasmentioning

confidence: 99%

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Review of graphene for the generation, manipulation, and detection of electromagnetic fields from microwave to terahertz

et al. 2022

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“…On the other hand, the use of graphene has been very impressive in recent years in the field of Nano-electronic and THz devices due to its high conductivity and the changeability of the conductivity by tuning the bias voltage. The use of graphene in THz imaging 6 , patch antennas [7][8][9] ultra-broadband absorbers 10 , and photoconductive antennas 11 has been reported. In 12 , a dual-band antenna with an average gain of 2.45 dB is designed by creating two circle strips on the graphene.…”

Section: Introductionmentioning

confidence: 99%

A Reconfigurable Graphene Patch Antenna Inverse Design at Terahertz Frequencies

Mashayekhi

Kabiri

Nooramin

et al. 2023

Preprint

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This article investigates the inverse design of a reconfigurable multi-band patch antenna based on graphene for terahertz applications to operate frequency range (2THz – 5THz). In the first step, this article evaluates the dependence of the antenna radiation characteristics on its geometric parameters and the graphene properties. The simulation results show that it is possible to achieve up to 8.8 dB gain, 13 frequency bands, and 360° beam steering. Then and due to the complexity of the design of graphene antenna, a deep neural network (DNN) is used to predict the antenna parameters by given inputs like desired realized gain, main lobe direction, half power beam width, and return loss in each resonance frequency. The trained DNN model predicts almost with 93% accuracy and 3% mean square error in the shortest time. Then, this network was used to design five-band and three-band antennas, and it has been shown that the desired antenna parameters are achieved with negligible errors. Therefore, the proposed antenna finds many potential applications in the THz frequency band.

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Micro-sized Graphene-Based UWB Annular Ring Patch Antenna for Short-Range High-Speed Terahertz Wireless Systems

Khabba

Amadid

Ouadi

et al. 2023

Advanced Structured Materials

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Graphene-Based Photoconductive Antenna Structures for Directional Terahertz Emission

Cited by 19 publications

References 32 publications

Review of graphene for the generation, manipulation, and detection of electromagnetic fields from microwave to terahertz

Review of graphene for the generation, manipulation, and detection of electromagnetic fields from microwave to terahertz

A Reconfigurable Graphene Patch Antenna Inverse Design at Terahertz Frequencies

Micro-sized Graphene-Based UWB Annular Ring Patch Antenna for Short-Range High-Speed Terahertz Wireless Systems

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