CPW Fed Flexible Graphene Based Thin Dual Band Antenna for Smart Wireless Devices

Vashi, Ronak; Upadhyaya, Trushit

doi:10.2528/pierm19120906

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Paper has been chosen as the substrate in some antenna designs, but the paper-based flexible substrate is more fragile than other substrates and has a high loss tangent that can reduce antenna efficiency [21,22]. Again, denim and glass fiber materials are also used in flexible antennas, but they are not stretchable, so it is difficult to use them for frequency-tunable applications [22]. Felt, as another material, is also flexible and has a low loss tangent, making it usable for work.…”

Section: Methodsmentioning

confidence: 99%

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

2021

Preprint

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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.

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Section: Methodsmentioning

confidence: 99%

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

2021

Preprint

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“…To obtain the antenna's behaviour under x-axis and y-axis bending conditions (H-plane and E-plane), the antenna under test is bent on foam (Styrofoam material, ε r = 1.03) cylinder with two different radius r = 15, 50 mm as shown in figures 6(c) and (d) [27]. The return loss performances of the antenna in bending (concave and convex) conditions are nearly the same with slight fluctuations in frequency and return loss compared with the antenna in the flat position as shown in both [27][28][29]. The effective length of the current path changes as bending occurs, affecting the overall performance and return loss.…”

Section: Impedance Bandwidthmentioning

confidence: 95%

Flexible inkjet-printed graphene antenna on Kapton

Ibanez‐Labiano¹,

Alomainy²

2021

Flex. Print. Electron.

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Flexible printed antennas have attracted a great deal of attention due to their significant potential for different technologies. Using novel materials such as graphene and inkjet printing fabrication techniques is key for further developing this technology. Several studies have characterised them separately, but it is still challenging to merge them to produce plausible flexible antennas. This paper presents the whole methodology, covering the design, fabrication process, and characterisation of a flexible, inkjet-printed graphene-based antenna intended to use within flexible electronics. The antenna pattern follows a new optimised quasi-Yagi–Uda design working in the desired range of operational frequencies (5–6 GHz). It consists of four directors and a pair of reflectors to improve the directivity with an efficiency of 42%. A co-planar waveguide feeding method is designed to tune the impedance matching, ensuring the wearer’s comfort. The flexible Kapton film was treated with plasma to improve the ink’s adhesion and coverage. The novel antenna suggested potential in advanced materials devices, suitable for various wireless applications for next-generation conformal and flexible electronic devices and applications.

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“…Graphene-flakes printed non-resonant planar elliptical dipole antenna designed with moderate conductivity of printed graphene flakes for wireless communication is proposed in [9,10]. Toward the graphene-based flexible antenna for the microwave regime based on various dielectric substrates such as polyimide, textile tags are discussed by the researchers in [11][12][13]. Carbon fiber composite or magnetic conductor is also an alternative material of the graphene for a wireless antenna despite the lower gain and conductivity of the material.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based wide band semi-flexible array antenna with parasitic patch for smart wireless devices

Vashi

Upadhyaya

Desai

2021

Int. J. Microw. Wireless Technol.

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In this paper, a semi-flexible 2 × 1 array antenna is proposed with epoxy glass fiber and graphene as patch and ground, respectively. Microstrip patch antenna with a center parasitic patch of half-wavelength and slot in the radiating patch have been incorporated for the bandwidth enhancement in order of 79.56% (2.21–5.13 GHz). The antenna has an overall size of 0.30λ × 0.24λ at a lower frequency of operation (2.45 GHz). The incorporation of slotted Graphene in radiating element leads to a wideband regime with satisfactory gain values of 2.73 and 3.744 dBi at 2.40 and 4.0 GHz, respectively. Antenna radiation efficiency in the range of 78% with linear polarization makes the antenna appropriate for WLAN band and smart wireless devices application.

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CPW Fed Flexible Graphene Based Thin Dual Band Antenna for Smart Wireless Devices

Cited by 3 publications

References 28 publications

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

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

Flexible inkjet-printed graphene antenna on Kapton

Graphene-based wide band semi-flexible array antenna with parasitic patch for smart wireless devices

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