Characterisation of tunable graphene antenna

Sa'don, Siti Nor Hafizah; Jamaluddin, Mohd Haizal; Kamarudin, Muhammad Ramlee; Ahmad, Fauzan; Yamada, Yoshıhıde; Kamardin, Kamilia; Idris, Izni Husna; Seman, Norhudah

doi:10.1016/j.aeue.2020.153170

Cited by 20 publications

(7 citation statements)

References 40 publications

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“…Graphene-based antenna studies have been carried out intensively, especially for the last five years [33,35,[78][79][80][81][82][83][84][85][86]. However, using graphene as an antenna is not always an easy task, and the production techniques also play an essential role in this manner.…”

Section: Introductionmentioning

confidence: 99%

3D-Printed Graphene-Based Bow-Tie Microstrip Antenna Design and Analysis for Ultra-Wideband Applications

Aydın

2021

Polymers

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In this study, the effects of graphene and design differences on bow-tie microstrip antenna performance and bandwidth improvement were investigated both with simulation and experiments. In addition, the conductivity of graphene can be dynamically tuned by changing its chemical potential. The numerical calculations of the proposed antennas at 2–10 GHz were carried out using the finite integration technique in the CST Microwave Studio program. Thus, three bow-tie microstrip antennas with different antenna parameters were designed. Unlike traditional production techniques, due to its cost-effectiveness and easy production, antennas were produced using 3D printing, and then measurements were conducted. A very good match was observed between the simulation and the measurement results. The performance of each antenna was analyzed, and then, the effects of antenna sizes and different chemical potentials on antenna performance were investigated and discussed. The results show that the bow-tie antenna with a slot, which is one of the new advantages of this study, provides a good match and that it has an ultra-bandwidth of 18 GHz in the frequency range of 2 to 20 GHz for ultra-wideband applications. The obtained return loss of −10 dB throughout the applied frequency shows that the designed antennas are useful. In addition, the proposed antennas have an average gain of 9 dBi. This study will be a guide for microstrip antennas based on the desired applications by changing the size of the slots and chemical potential in the conductive parts in the design.

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Section: Introductionmentioning

confidence: 99%

3D-Printed Graphene-Based Bow-Tie Microstrip Antenna Design and Analysis for Ultra-Wideband Applications

Aydın

2021

Polymers

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“…In order to study the effect of material properties on antenna performance, two different materials, gold and graphene, are used to simulate the proposed fractal butterfly antenna. And the performance of our fractal butterfly antenna which using graphene material is also compared with other two antennas which proposed in reference [29] and [37]. The comparison results are shown in Table 4, where gold and graphene 1 are the simulated results of the fractal butterfly antenna, and graphene 2 and 3 are the antenna performance parameters of references [29] and [37].…”

Section: Data Comparison and Analysismentioning

confidence: 99%

“…And the performance of our fractal butterfly antenna which using graphene material is also compared with other two antennas which proposed in reference [29] and [37]. The comparison results are shown in Table 4, where gold and graphene 1 are the simulated results of the fractal butterfly antenna, and graphene 2 and 3 are the antenna performance parameters of references [29] and [37]. Figure 9 shows the simulated results (Gain, VSWR, S(p1,p1)) of the fractal butterfly antenna using gold and graphene as materials, respectively.…”

Section: Data Comparison and Analysismentioning

confidence: 99%

Design of Terahertz Detection Antenna With Fractal Butterfly Structure

et al. 2021

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Terahertz (THz) technology can be widely used in radar, remote sensing, homeland security and counter-terrorism, high-secret data communication and transmission, atmospheric and environmental monitoring, real-time biological information extraction, and medical diagnosis. It is the frontier of current research. However, most of highly sensitive THz detectors work in a relatively narrow frequency range. It attracts great attention to design a high-gain terahertz antenna operates in a wide spectrum range. In this paper we propose a new structure of fractal butterfly antenna with high gain which can be used for broadband THz detection. This fractal butterfly antenna is constructed by independent fractal unit groups on butterfly antenna, which simplifies the antenna manufacturing process and reduces the manufacturing cost. The antenna can operate in the 0.1-10 THz frequency band, with impedance bandwidth of 85% resonated at 4.9 THz, return loss of as small as -33.59 dB, and maximum gain of 16.95 dB. Among the antenna with 3 to 4 fractal unit groups, the best operation band of the antenna is 6.2-6.4 THz. The proposed fractal butterfly antenna can effectively improve the performance of terahertz detectors, and provide the possibility for detection research in higher frequency bands.

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“…The conductivity of the two graphene patches can be ideally tuned by a top-gate configuration using a 30 nm-thick HfO 2 layer, two decoupling capacitors ( C dec ) and a polarization network. This way, we can tune the gain and the operating frequency of each antenna [ 27 , 28 ] thus conferring “smart” characteristics to the T/R module. We simulated the single graphene patch and the array made of two elements using the 3D EM simulator CST Studio Suite ® , then we used the resulting 1-port (or 2-port) scattering matrix to simulate at the circuit level the entire T/R module (by NI AWR Design Environment ® , AWR Inc., El Segundo, CA, USA).…”

Section: Atomic-scale Ferroelectric Junctions As Microwave Switchementioning

confidence: 99%

Perspectives on Atomic-Scale Switches for High-Frequency Applications Based on Nanomaterials

2021

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Nanomaterials science is becoming the foundation stone of high-frequency applications. The downscaling of electronic devices and components allows shrinking chip’s dimensions at a more-than-Moore rate. Many theoretical limits and manufacturing constraints are yet to be taken into account. A promising path towards nanoelectronics is represented by atomic-scale materials. In this manuscript, we offer a perspective on a specific class of devices, namely switches designed and fabricated using two-dimensional or nanoscale materials, like graphene, molybdenum disulphide, hexagonal boron nitride and ultra-thin oxides for high-frequency applications. An overview is provided about three main types of microwave and millimeter-wave switch: filament memristors, nano-ionic memristors and ferroelectric junctions. The physical principles that govern each switch are presented, together with advantages and disadvantages. In the last part we focus on zirconium-doped hafnium oxide ferroelectrics (HfZrO) tunneling junctions (FTJ), which are likely to boost the research in the domain of atomic-scale materials applied in engineering sciences. Thanks to their Complementary Metal-Oxide Semiconductor (CMOS) compatibility and low-voltage tunability (among other unique physical properties), HfZrO compounds have the potential for large-scale applicability. As a practical case of study, we present a 10 GHz transceiver in which the switches are FTJs, which guarantee excellent isolation and ultra-fast switching time.

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Characterisation of tunable graphene antenna

Cited by 20 publications

References 40 publications

3D-Printed Graphene-Based Bow-Tie Microstrip Antenna Design and Analysis for Ultra-Wideband Applications

3D-Printed Graphene-Based Bow-Tie Microstrip Antenna Design and Analysis for Ultra-Wideband Applications

Design of Terahertz Detection Antenna With Fractal Butterfly Structure

Perspectives on Atomic-Scale Switches for High-Frequency Applications Based on Nanomaterials

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