Beam reconfigurable antenna for the THz band based on a graphene high impedance surface

Radwan, Ahmed; Verri, V.; D’Amico, M.; Gentili, Gian Guido

doi:10.1016/j.physe.2016.09.015

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…Many imaging techniques include X-ray radiography, X-ray CT, MRI, ultrasonography, elastography, optical imaging, radionuclide imaging (Scintigraphy, PET and SPECT, thermography, and terahertz imaging [2]. Terahertz medical imaging is found to be comparatively safer for the biological tissues as compared to other medical imaging techniques due to nonionizing radiations [3], The terahertz region (THz=10 12 ), as specified by the International Telecommunications Union (ITU), occupies the electromagnetic spectrum from 0.3 to 10 THz [4]. Since it lies in between the infrared and microwave regions, it exhibits characteristics of both.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Ultra-Wideband Microstrip Patch Antenna for Different Conductive Materials for Terahertz Gap

Singh,

Dhayal,

Dwivedi

2023

Preprint

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The paper explores the design and analysis of a wideband microstrip patch antenna with a metallic patch and a 3x3 split ring resonator (SRR) array operating in the 0.1-5 THz frequency range. The antenna's structure incorporates different conductive materials such as gold, silver, and graphene as a metallic patch. The dimensions of the metallic patch and SRR are calculated to achieve wideband operation within the desired THz range. The SRR array enhances electromagnetic resonance, thereby improving bandwidth and radiation characteristics for medical imaging. The study discusses the equivalent circuit and design equations for the microstrip patch antenna and SRR unit cell. For designing and analysing the proposed antenna, CST Microwave Studio 2019 software have been used. Performance parameters such as return loss, bandwidth, gain, efficiency, directivity, VSWR, and radiation pattern have been evaluated. The advantages and limitations of each conductive material are evaluated to determine their suitability for THz-based medical imaging applications. The goal is to maximize the antenna's bandwidth, gain, and image resolution for medical imaging purposes. The findings highlight the performance characteristics of gold, silver, and graphene as conductive materials for medical imaging applications, facilitating the development of high-resolution, non-invasive imaging systems with improved diagnostic capabilities.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of Ultra-Wideband Microstrip Patch Antenna for Different Conductive Materials for Terahertz Gap

Singh,

Dhayal,

Dwivedi

2023

Preprint

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“…8,9 Moreover, the patch THz antenna using graphene has been designed to investigate the effect of the feed line, which is designed as a compact or multiband THz antenna. 10,11 Also, the graphene material has been used for the ultra-wide band (UWB) antenna in the THz spectrum. 12 Furthermore, other types of THz antennas have been developed for various aims.…”

Section: Introductionmentioning

confidence: 99%

Dual-band THz antenna with SNG loads for biosensing and early skin cancer detection with Fano response: A numerical study

Poorgholam-Khanjari

Zarrabi

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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THz spectrum is one of the safest areas of light for the body which can be considered in biomedical sensing applications in the human body and can be utilized for high sensitivity detection. In this paper, a THz antenna with a single negative (SNG) load is developed for early cancer detection application. The SNG load is useful to increase the gain and efficiency of the antenna. The primary antenna has a circular slot on the ground plane. Metamaterial element is placed on the cylindrical dielectric. The total size of the antenna is 400 × 400 μm 2 and the loss-less quartz substrate is used to design the proposed antenna. In addition, the SNG load provides dual-band characteristics, and the proposed antenna covers 0.85 and 1 THz with high directivity and efficiency which is more than 90%. The achieved results proved that the antenna has higher sensitivity at a lower frequency. Moreover, we showed the proposed dual-band antenna can be used to increase the sensing accuracy of the device to detect the progress of cancer in a specific sample.

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“…Traditional antennas are difficult to meet the needs of terahertz communication systems for antenna performance. In recent years, reconfigurable antennas have been widely studied due to their capability of providing more functionalities than traditional ones for various applications, such as tunable frequency 1–4 and radiation pattern, 5–8 which makes it an attractive candidate for terahertz communication system.…”

Section: Introductionmentioning

confidence: 99%

Design of a reconfigurable antenna based on graphene for terahertz communication

Zhang

Ruan

Dai

et al. 2021

Int J Numerical Modelling

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A broadband, high radiation efficiency graphene‐based reconfigurable square spiral antenna for terahertz communication is proposed. The main part of the antenna is the graphene‐based square spiral microstrip patch. The proposed antenna is built and simulated using high‐frequency structure simulator (HFSS). By applying different combinations of chemical potentials on the graphene layer, the operating frequency of the antenna can be varied from 0.1 to 2 THz. The tuning range of frequency and beam direction with same and different chemical potentials applied to the two graphene sheets are also studied. When the antenna is applied with different chemical potentials, the required bias voltages are much lower to achieve the same frequency tuning range, and the tuning range of beam direction is about 2.5 times that of same chemical potentials. The realized beam reconfiguration of the proposed antenna is over a wide range up to 74°, and the calculated maximum radiation efficiency of the proposed antenna at 1.48 THz is 85.06%. Therefore, the proposed reconfigurable antenna makes it extremely promising for terahertz communication system.

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Beam reconfigurable antenna for the THz band based on a graphene high impedance surface

Cited by 18 publications

References 25 publications

Design and Analysis of Ultra-Wideband Microstrip Patch Antenna for Different Conductive Materials for Terahertz Gap

Design and Analysis of Ultra-Wideband Microstrip Patch Antenna for Different Conductive Materials for Terahertz Gap

Dual-band THz antenna with SNG loads for biosensing and early skin cancer detection with Fano response: A numerical study

Design of a reconfigurable antenna based on graphene for terahertz communication

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