Terahertz Graphene-Based Reconfigurable Patch Antenna

Azizi, Mohamed Karim; Ksiksi, Mohamed Amin; Ajlani, H.; Gharsallah, A

doi:10.2528/pierl17081402

Cited by 32 publications

(12 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been proven that the geometric changes made in the conductive parts of the antenna also affect their performance. In order to demonstrate the effect of graphene in one of the graphene-based antenna studies, the study was carried out by choosing copper as the conductive patch part [101]. From the study of Azizi et al, it is clear that the return loss peak value is almost twice that obtained with the copper patch (about −29 dB) for the graphene patch [101].…”

Section: Resultsmentioning

confidence: 99%

“…In order to demonstrate the effect of graphene in one of the graphene-based antenna studies, the study was carried out by choosing copper as the conductive patch part [101]. From the study of Azizi et al, it is clear that the return loss peak value is almost twice that obtained with the copper patch (about −29 dB) for the graphene patch [101]. In another study [34], undoped pure graphene is used for the antenna design, and the antenna is modeled in the simulation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Aydın

2021

Polymers

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

Aydın

2021

Polymers

View full text Add to dashboard Cite

show abstract

“…The surface conductivity of graphene is defined as a function that includes the frequency of the excitation electromagnetic wave, its temperature (Т), its chemical potential (Ef), and the diffusion rate of the carriers (Γ) [25]. This conductivity formula is usually illustrated by the Kubo equation [25,26] and is also directly related to the effects of in-band and inter-band transitions.…”

Section: Graphene Materialsmentioning

confidence: 99%

“…The contributions of the int ra Azizi et.al. gave the graph containing the real and imaginary parts of the normalized complex surface conductivity of graphene at their study, and it is clear that the contribution of intertransitions to the conductivity is negligible compared to between bands[25].…”

mentioning

confidence: 99%

A Novel Flexible Microstrip Patch Antenna with Different Conductive Materials For Telemedicine and Mobile Biomedical Imaging Systems

2021

Preprint

View full text Add to dashboard Cite

Telemedicine and mobile healthcare communication devices require compact antennas with superior performance and reduced size and weight. The design and development of such antennas for broadband applications are challenging for many researchers. In this study, a wearable rectangular microstrip antenna was designed and implemented to detect many tumors. The patch and ground part of the antenna, which can be used as both a transmitter and a receiver in microwave imaging systems, are made of copper tape, graphene, conductive paint, and the substrate is made of felt (Ɛr = 1.3). Antenna parameters were optimized using the CST Microwave Studio program. The conventional microstrip antennas have a narrow band and low gain. The antenna in this study is designed and implemented differently from the conventional microstrip antennas and can be easily used in applications requiring ultra-wideband. In addition, the radiation characteristic of the designed antenna is quite good, and the electric field change around it is at a level that will not cause any health problems. The variation of the conductivity values of the organs in the human body is high in the 1 GHz-10 GHz frequency band. The antenna, which is designed based on the fact that the conductivity values of healthy tissues and tumor/cancer tissues are different, can be used in microwave imaging systems to detect tumors in organs such as the lung, brain, liver, and kidney. Also, the designed antenna is in a wearable form, allowing continuous monitoring of patients with high cancer risk. In this article, a microstrip patch antenna with a flexible substrate with copper tape, conductive paint, and graphene-based conductor that can be used for imaging and telemedicine applications is proposed, and its performance is experimentally analyzed. A standard and low-cost 3D printer are used to produce the graphene-based conductive part. In addition, copper tape and conductive paint materials were used to produce the patch part with an easier and cheaper method without a special device. The performance, return loss, and gain of the produced antennas were analyzed both in simulation and experimentally.

show abstract

“…It is possible to manually or automatically change the resonance frequency, operational bandwidth, and radiation pattern of a designed reconfigurable structure (antenna, filter,...) [3]. The most popular reconfiguration methods are electromechanical systems (MEMS or NEMS), electrical RF switches, varactors, tunable materials diode-based technology such as the P-type Insulator N-type diode (PIN diode) or tunable materials using a mechanical, electrical, magnetic, light, and thermal bias [4]. The most significant merit is that the properties of graphene-based antennas can be easily controlled using the electric field effect in the THz frequency.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Hybrid Metal-graphene UWB Filters for Terahertz Applications

Krid¹,

Houaneb²,

Zairi³

2022

PIER C

View full text Add to dashboard Cite

This paper presents the design, analysis, and developments of a reconfigurable hybrid metalgraphene filter for terahertz applications. In fact, through the graphene material, we can reconfigure both the resonance frequency and the bandwidth. Further, the variation in chemical potential, relaxation times, and temperature of graphene provides excellent proprieties performances, with a variation of the resonant frequency from 8.60 THz to 8.85 THz, good return loss reaching −22.94 dB, and a bandwidth reconfiguration from 1.717 THz to 1.930 THz. The simulation of the proposed filter is performed using CST software.

show abstract

Terahertz Graphene-Based Reconfigurable Patch Antenna

Cited by 32 publications

References 17 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

A Novel Flexible Microstrip Patch Antenna with Different Conductive Materials For Telemedicine and Mobile Biomedical Imaging Systems

Reconfigurable Hybrid Metal-graphene UWB Filters for Terahertz Applications

Contact Info

Product

Resources

About