Transparent graphene microstrip filters for wireless communications

Wang, Jinchen; Guan, Yifei; Yu, Hua; Li, Na; Wang, Shuopei; Shen, Cheng; Dai, Zhijiang; Gan, Decheng; Yang, Rong; He, Songbai; Zhang, Guangyu

doi:10.1088/1361-6463/aa7c99

Cited by 13 publications

(13 citation statements)

References 23 publications

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“…To satisfy the diversified industrial demand, passbands of filters should be adjustable during the design phase [33]. Therefore, a novel passband adjustment method is proposed in this paper.…”

Section: Folsir Analysismentioning

confidence: 99%

“…In Ref [32], the multi-mode characteristic of substrate-integrated waveguide (SIW) is employed for a 5G dual-band BPF, but the size is relatively large. In Ref [33], a dual-band transparent a graphene microstrip filter for 5G is designed; nevertheless, large insertion loss limited the application of this filter. To our best knowledge, the tri-band BPFs for 5G mobile communication systems with compact size, low loss, and wide passbands have not been proposed and discussed in the literatures.…”

Section: Introductionmentioning

confidence: 99%

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Dual-/Tri-Wideband Bandpass Filter with High Selectivity and Adjustable Passband for 5G Mid-Band Mobile Communications

et al. 2020

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The design and implementation of the filters for the fifth-generation (5G) mobile communication systems are challengeable due to the demands of high integration, low-cost, and high-speed data transmission. In this paper, a dual-wideband bandpass filter (BPF) and a tri-wideband BPF for 5G mobile communications are proposed. The dual-wideband BPF consists of two folded open-loop stepped-impedance resonators (FOLSIRs), and the tri-wideband BPF is designed by placing a pair of folded uniform impedance resonator inside the dual-wideband BPF with little increase in the physical size of the filter. By employing a novel structural deformation of a stepped-impedance resonator, the FOLSIR is achieved with a more compact structure, a controllable transmission zero, and an adjustable resonant frequency. The measurement results show that the working bands of the two filters are 1.98–2.28/3.27–3.66 GHz and 2.035–2.305/3.31–3.71/4.54–5.18 GHz, respectively, which are consistent with the full-wave EM simulation results. The implemented filters have a compact size and the results show low loss, good out-of-band rejection, and wide passbands covering sub-6 GHz bands of 5G mobile communications and a commonly used spectrum.

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Section: Folsir Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-/Tri-Wideband Bandpass Filter with High Selectivity and Adjustable Passband for 5G Mid-Band Mobile Communications

et al. 2020

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“…However, the abovementioned methods of fabricating graphene filter are more complicated and time‐consuming. Moreover, the monolayer graphene is not suitable for microwave devices application since it exhibits relatively large insertion losses because of its coupling excitations . On the contrary, multilayer graphene films with higher conductivity are developed and they also exhibit better durability, flexibility, and easy‐process than monolayer graphene and most metals.…”

Section: Introductionmentioning

confidence: 99%

“…3 Graphene filters have been demonstrated and shown to have diverse properties; however, most investigations to-date have been involved in the terahertz band. [4][5][6][7][8] The concept, synthesis, analysis, and design of graphene-metal based tunable band-pass filters at terahertz frequency are reported, 6 In addition, the simulation of stepped impedance low-pass filter for the propagating surface plasmons in the terahertz band is realized by controlling graphene's field effect. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the monolayer graphene is not suitable for microwave devices application since it exhibits relatively large insertion losses because of its coupling excitations. 8 On the contrary, multilayer graphene films with higher conductivity are developed and they also exhibit better durability, flexibility, and easy-process than monolayer graphene and most metals. Some graphene film-based devices have been proposed in terms of waveguides, 9,10 transistors, 11 sensors, 12 oscillators, 13 switches, 14,15 antennas, 16,17 and modulators.…”

Section: Introductionmentioning

confidence: 99%

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Design and manufacture of lowpass microstrip filter with high conductivity graphene films

Zhou

Liu

Huang

et al. 2018

Micro & Optical Tech Letters

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The design and manufacture of lowpass microstrip filter with high conductivity graphene films (HCGF) is reported, which is a proven work of the feasibility of HCGF used in microwave devices for wireless communications. The filter is designed as a fifth order Chebyshev step‐impedance lowpass microstrip filter operating at 2.5 GHz, its conduct strip is the novel HCGF. Based on the parametric study in the design, the optimum structure parameters of the filter are selected to fabricate the filters using HCGF with conductivity up to 1.1 × 106 S/m. It is fabricated with precise and efficient method of laser engraving technique. The test results show that in‐band microwave signals can transmit through the proposed HCGF filter effectively with insertion loss of 0.68 dB. The results in this paper show that HCGF filter has good performance comparable characteristics of the traditional copper filters.

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Multifunctional High Entropy Alloys Enabled by Severe Lattice Distortion

Wang

Gao

et al. 2023

Advanced Materials

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Since 2004, the design of high entropy alloys (HEAs) has generated significant interest within the materials science community due to their exceptional structural and functional properties. By incorporating multiple principal elements into a common lattice, it is possible to create a single‐phase crystal with a highly distorted lattice. This unique feature enables HEAs to offer a promising combination of mechanical and physical properties that are not typically observed in conventional alloys. In this article, we provide an extensive overview of multifunctional HEAs that exhibit severe lattice distortion, covering the theoretical models that were developed to understand lattice distortion, the experimental and computational methods employed to characterize lattice distortion, and most importantly, the impact of severe lattice distortion on the mechanical, physical and electrochemical properties of HEAs. Through this review, we hope to stimulate further research into the study of distorted lattices in crystalline solids.This article is protected by copyright. All rights reserved

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Transparent graphene microstrip filters for wireless communications

Cited by 13 publications

References 23 publications

Dual-/Tri-Wideband Bandpass Filter with High Selectivity and Adjustable Passband for 5G Mid-Band Mobile Communications

Dual-/Tri-Wideband Bandpass Filter with High Selectivity and Adjustable Passband for 5G Mid-Band Mobile Communications

Design and manufacture of lowpass microstrip filter with high conductivity graphene films

Multifunctional High Entropy Alloys Enabled by Severe Lattice Distortion

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