Amplitude-Phase Variation in a Graphene-Based Microstrip Line

Yasir, Muhammad; Fatikow, Sergej; Haenssler, Olaf C.

doi:10.3390/mi13071039

Cited by 5 publications

(4 citation statements)

References 23 publications

(30 reference statements)

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“…It can be seen that they are numerous and thus following a network interconnecting each other [50]. The SEM image of the filler (Figure 3b) shows an individual graphene nanoplatelet with edges that are transparent, showing that the composition of the nanoplatelets is that of a few graphene layers [51,52]. From the SEM images, the approximate dimension of flakes can be estimated to be 300 nm.…”

Section: Characterization Of Graphene Nanoplatelets and Its Composite...mentioning

confidence: 99%

RF Sensor with Graphene Film for HRP Concentration Detection

Peinetti

Yasir

Savi

2023

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This paper presents a radio-frequency (RF) antenna as a sensor to detect Horseradish peroxidase (HRP). At the core of the proposed approach is a graphene film deposited on a stub connected to an RF antenna. The graphene film is doctor bladed on the stub. The film is then properly chemically functionalized in order to detect the presence of Horseradish peroxidase (HRP). We validate the proof-of-concept operation of HRP concentration detection by measuring the frequency shift of the reflection coefficient of the antenna using very small concentration of HRP (0.03 mM to 0.6 mM).

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Section: Characterization Of Graphene Nanoplatelets and Its Composite...mentioning

confidence: 99%

RF Sensor with Graphene Film for HRP Concentration Detection

Peinetti

Yasir

Savi

2023

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“…With the advancement of material research, nanomaterials are gradually applied to various industries. Among them, graphene has attracted the attention of many researchers due to its unique electrical, optical, and mechanical properties [1][2]. As the technology of graphene large-scale preparation has become more mature over the years, its application in microwave devices also has a richer scene [3].…”

Section: Introductionmentioning

confidence: 99%

The Structure Design of a Microstrip Tunable Attenuator Based on Few-Layer Graphene

Jiao,

Tang,

Chen

et al. 2023

J. Phys.: Conf. Ser.

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There are innovative applications for graphene materials in microwave Radio Frequency (RF) due to their unique optoelectronic properties. In this paper, a series of existing tunable microstrip attenuators based on few-layer graphene are compared and studied, and a new microstrip tunable attenuator based on few-layer graphene is proposed on this basis. Firstly, the relationship between the performance of different pair spacing attenuators with 4 pairs of graphene structures is analyzed based on the existing pair spacing studies with 1-3 pairs of structures; after that, the performance characteristics of the existing 1-4 pairs of graphene structures on different substrates are tested and analyzed; finally, a new tunable attenuator structure is proposed based on the above research results. The new attenuator consists of four parts, including a dielectric substrate, a microstrip line, a total of five pairs of graphene flakes on both sides and corresponding metal vias. The resistivity of the graphene flake can be changed by changing the access bias voltage, thus regulating the insertion loss of the attenuator. The experimental results show that the proposed attenuator can operate in the frequency range from 3 GHz to 10 GHz, and the insertion loss can be adjusted from -2 dB to -63 dB, with a high tunable performance of 61 dB.

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“…Pure graphene cannot be directly used, but printable graphene-based inks can be manufactured by dispersing flakes into a proper solvent. Among the different printing techniques, the most used are chemical vapour deposition [7], drop casting [8,9], screen printing [10], and epitaxial growth [11].…”

Section: Introductionmentioning

confidence: 99%

Correlation of Transmission Properties with Glucose Concentration in a Graphene-Based Microwave Resonator

Yasir,

Peinetti,

Savi

2023

Micromachines

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Carbon-based materials, such as graphene, exhibit interesting physical properties and have been recently investigated in sensing applications. In this paper, a novel technique for glucose concentration correlation with the resonant frequency of a microwave resonator is performed. The resonator exploits the variation of the electrical properties of graphene at radio frequency (RF). The described approach is based on the variation in transmission coefficient resonating frequency of a microstrip ring resonator modified with a graphene film. The graphene film is doctor-bladed on the ring resonator and functionalised in order to detect glucose. When a drop with a given concentration is deposited on the graphene film, the resonance peak is shifted. The graphene film is modelled with a lumped element analysis. Several prototypes are realised on Rogers Kappa substrate and their transmission coefficient measured for different concentrations of glucose. Results show a good correlation between the frequency shift and the concentration applied on the film.

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Amplitude-Phase Variation in a Graphene-Based Microstrip Line

Cited by 5 publications

References 23 publications

RF Sensor with Graphene Film for HRP Concentration Detection

RF Sensor with Graphene Film for HRP Concentration Detection

The Structure Design of a Microstrip Tunable Attenuator Based on Few-Layer Graphene

Correlation of Transmission Properties with Glucose Concentration in a Graphene-Based Microwave Resonator

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