Tuning the Filter Responses with Graphene Based Resonators

Ilić, Aleksandra; Bukvic, Branko; Budimir, D.; Ilić, Milan M.

doi:10.1109/iceaa.2019.8879418

Cited by 3 publications

(4 citation statements)

References 6 publications

(13 reference statements)

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“…The allocation of the UWB spectrum varies across regions. In the United States, UWB operates within the 3.1 to 10.6 GHz frequency band [1], [6][7][8][9]. Europe designates a low band of 3.1 GHz to 4.8 GHz and a high band of 6 GHz to 8.5 GHz for UWB [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Design Of a Compact Ultra-Wideband Antenna for Wireless Communication

Ahmed,

Salah,

Mumin

et al. 2024

Preprint

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Ultra-wideband (UWB) technology heralds a swiftly evolving wireless communication medium with a high data rate. Embracing this burgeoning technology poses numerous challenges. The primary concern is crafting an antenna element optimized for the expansive UWB frequency band. Equally crucial is the development of UWB antenna beam-forming systems that incorporate a suite of UWB components—feed networks, transitions, crossovers, hybrid couplers, and phase shifters aligned meticulously with UWB standards. This article recommends deploying an Ultra-wideband (UWB) antenna tailored for UWB applications, operating within the 3.1 GHz to 10.6 GHz range. The goal is a compact, linear antenna with a VSWR of 2, ensuring compliance with UWB requirements. Extensive research examines the antenna's characteristics, encompassing radiation patterns and maximum gain. Notably, the proposed UWB antenna maintains a stable impedance (Za) of 50 Ω, successfully achieving a 3.1 to 10.6 GHz bandwidth. Empirical measurements validated the calculations, confirming gains of 2.45dBi at 3.1 GHz and 6.62dBi at 10.6 GHz.

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Section: Introductionmentioning

confidence: 99%

Design Of a Compact Ultra-Wideband Antenna for Wireless Communication

Ahmed,

Salah,

Mumin

et al. 2024

Preprint

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“…Using tunable resistivity characteristics, graphene has been widely used in many microwave devices. For example, antennas [ 12 ], attenuators [ 13 , 14 , 15 ], filters [ 16 , 17 ], and two tunable microstrip filters based on graphene nanoplates are proposed. In [ 18 ], graphene is located in the middle of the microstrip line, which describes a method of combining graphene with the microstrip line.…”

Section: Introductionmentioning

confidence: 99%

“…The filter and attenuator are merged into one device in Figure 1 b, which not only reduces the circuit size, but also improves the performance of the device. Although studies on tunable filtering attenuators are carried out in [ 16 , 17 ], their devices did not have good selectivity.…”

Section: Introductionmentioning

confidence: 99%

High-Selectivity Bandpass Filter with Controllable Attenuation Based on Graphene Nanoplates

et al. 2022

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A high-selectivity band pass filter with controllable attenuation based on graphene nanoplates is proposed in this paper. Graphene with controllable resistance has a good uniform attenuation effect to electric field intensity. The filter utilizes quarter wavelength stepped impedance resonators and mixed electromagnetic coupling to have compact circuits and high performance. The graphene nanoplates are loaded on the microstrip resonator to reduce the electric field intensity, which results in a flat attenuation in the passband. In addition, the filter has two transmission zeros, which lead to a strong selectivity. Finally, a high-selectivity bandpass filter with controllable attenuation is formed. By changing the bias voltage of graphene, a controllable attenuation of 1.64–11.13 dB can be achieved in the working passband centered at 1.36 GHz. In order to validate the concept, the prototype is fabricated and measured. The measurement results are in good agreement with the simulation results. The proposed high-selectivity bandpass filter with controllable attenuation based on graphene nanoplates has widely potential in reconfigurable wireless communication systems and radar systems due to its high integration and versatility.

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“…Due to tunable resistivity characteristic of graphene, graphene has been utilized in RF graphene field effect transistor, graphene antenna, and graphene microstrip attenuator [8]. For instance, two tunable microstrip filters [12,13], attenuators [14][15][16], and antenna [17] are proposed. Besides, a study has been proposed [18] using graphene combined with microstrip line by locating graphene in the middle of microstrip line and implementing a microwave low-pass filter by replacing metal plates with graphene [18].…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Material for Microstrip Bandpass Filter

Azman,

Zaini,

Yeow

et al. 2022

PIER M

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Graphene has become one of the most essential materials in recent years due to its numerous advantages and benefits. Because of its features, graphene is becoming more widespread in a variety of applications, particularly in electrical devices. In this research, graphene thick film paste (GTP) has been used to fabricate a microstrip bandpass filter (BPF). To obtain graphene nanoparticle powder, graphene oxide (GO) was synthesized from nanoparticle graphite using the Improved Hummers Method (IHM). The graphene oxide (GO) was chemically reduced to reduced graphene oxide or graphene (rGO) using ascorbic acid as the reducing agent. The structural and morphological properties of three nanoparticle powders, G, GO, and rGO, were investigated. An X-ray Diffractometer (XRD) (Rigaku Miniflex) with a diffraction angle of 10 • to 60 • was used to differentiate and determine the structure of crystalline materials. Thermal stability of the samples was identified using thermogravimetric analysis (TGA). The synthesized rGO has been used to fabricate BPF circuit. The obtained nanoparticle rGO was mixed with an organic carrier composed of linseed oil, m-xylene, and α-terpineol to form GTP. The GTP was screen printed on RT duroid 5880 substrates to form BPF circuit. The BPF circuit that was created was tested for paste-to-substrate adhesion. Then, the fabricated BPF circuit was tested using vector network analyzer (VNA) and compared with conventional BPF to obtain scattering parameter results which include return loss, insertion loss, and bandwidth. The graphene BPF circuit demonstrated a good performance with return loss and insertion loss at −27.481 dB and −0.725 dB, respectively, and a bandwidth of 1.5916 GHz while conventional return loss was −26.750 dB and insertion loss value the same as graphene which is −0.725 dB and bandwidth 0.7077 GHz. From the result graphene BPF showed better result than conventional BPF.

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Tuning the Filter Responses with Graphene Based Resonators

Cited by 3 publications

References 6 publications

Design Of a Compact Ultra-Wideband Antenna for Wireless Communication

Design Of a Compact Ultra-Wideband Antenna for Wireless Communication

High-Selectivity Bandpass Filter with Controllable Attenuation Based on Graphene Nanoplates

Graphene-Based Material for Microstrip Bandpass Filter

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