A compact graphene-based dual-band band-stop filter using new hook-shaped resonator for THz applications

Zonouri, Seyed Abed; Hayati, Mohsen

doi:10.1016/j.mssp.2022.107150

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…For the unregulated bandstop filter, the core question is how to make the bandwidth of the stopband narrower. To this end, S Zonouri and Hayati proposed a plasmonic dual-band stop filter, which was achieved using a graphene hook-shaped resonator [14]. The Q value of this filter is determined by the side length of the graphene hook-shape, leading to two Q values of 4.44 and 5.56 at two resonance modes, respectively.…”

Section: Introductionmentioning

confidence: 99%

High-Q terahertz bandstop filter via cuboid frame structure

Wang

et al. 2023

J. Micromech. Microeng.

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Terahertz (THZ) band stop filter can be used to filter interference signals in a filter pass band. The quality factor (Q) is the most important index to evaluate the transmission performance of filter. Usually, the high Q, the narrow bandwidth and the large slope of the stop band will promise the good filtering accuracy and transmission response. However, the Q value taken from metamaterial structures designed on the plane is always only in the single digit, resulting in less than satisfactory in filtering performance. Herein, a high Q terahertz band stop filter based on metamaterials was proposed. To fabricate this three-dimensional (3D) metamaterial structure, a microtopographic substrate guided method with feasible and high accuracy capacities was proposed. As a result, the device is measured to be in the filtering state in 1.038-1.102 THz while it is stopped in 1.062-1.066 THz. The similarity between the experimental and simulated transmission is up to 86.32%, indicating the fabricating method possesses a high accuracy. Accordingly, the Q value was calculated to be as high as 532. The band stop filter with this record Q value can be widely used in THZ detection, imaging and sensing in future. Meanwhile, the proposed fabrication method is effectively applied in 3D metamaterial and THZ device as well.

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Section: Introductionmentioning

confidence: 99%

High-Q terahertz bandstop filter via cuboid frame structure

Wang

et al. 2023

J. Micromech. Microeng.

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“…Metamaterials are becoming an up-and-coming option, especially with high frequencies [31][32][33]. At the same time, some designers are developing new filter technologies to cover the terahertz area through the graphene principle as well illustrated in [34][35][36]. All these designs are studied and prototyped to have at least two BWs and several applications [37,38].…”

Section: Introductionmentioning

confidence: 99%

Four Subbands from Dual Mismatched Wideband Bandpass Filter for 5G/WAS/Wi-Fi/WiMAX/WLAN Applications

Massamba

Mbango

2023

International Journal of RF and Microwave Computer-Aided Engine

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Based on the simplicity of the design method, this paper presents a new approach for developing matched subbands when splitting two mismatched dual-wideband bandpass filters (BPFs) for the fifth generation (5G), wireless access systems (WAS), wireless fidelity (Wi-Fi), worldwide interoperability for microwave access (WiMAX), wireless local area network (WLAN), radar, and other communication devices. The method’s novelty involves using identical quarter-wavelength resonators terminated by alternated short-and-open stub configurations. Both configurations alternate and describe a perfect symmetry by their location from each other to make the subbands possible in the low-frequency and its harmonic (high-frequency) bandwidths (BW). A stub admittance Y 1 is defined and associated with the mainline section characteristic impedance Z 0 and an operating frequency f 0 . A quality factor Q a p is connected to Y 1 and f 0 to approach the BPF global quality factor Q g initially fixed. The stub characteristic impedance and the mainline one differ, while electric lengths (stub and mainline section) are identical. Using the operating frequency determines physical dimensions, creates harmonic frequencies and the rejected BW, mismatches the main frequency BW, matches the subbands, and creates transmission zero (TZ). Hence, a 28.118-dB stopband that separates the two bandpasses at 9.373 GHz is made. At the same time, the unmatched dual ultrawideband (UWB) covers a large panel of communication systems. The lowest (3.146–5.431) and highest (11.891–14.749) GHz BW exhibit a minimum insertion loss (IL) of 0.656 dB and 3.027 dB. The subbands return losses (RL) are better than 28 dB and 19 dB, respectively, and a flat group delay of 0.205 ns is obtained in the upper band. All subbands adaptation methodology is read from 10 dB of the RL. In that case, the four matched subbands in its lower wideband are 3.327–3.709 GHz and 4.442–5.048 GHz, and in its higher wideband are 11.922–12.486 GHz and 14.281–14.653 GHz. The 2275/2858 MHz is the dual-wideband with a fractional BW 53.282/21.456%. The fabricated prototype has validated the EM-simulations, and Anritsu MS4642B 20 GHz vector network analyzer (VNA) has been used for experimental results by scanning the frequency range 3 GHz–15 GHz. The tested prototype is made with a 1 mm FR4 HTG-175 thickness by considering a dielectric constant of 4.4, and its overall size occupies 22.45 × 5.72 m m 2 ( 0.32 λ 0 × 0.082 λ 0 mm 2 ).

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Design of a MIM sensor using an optical resonator and GMDH algorithm for high efficiency applications

Zonouri,

Hayati

2024

J Comput Electron

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A compact graphene-based dual-band band-stop filter using new hook-shaped resonator for THz applications

Cited by 7 publications

References 29 publications

High-Q terahertz bandstop filter via cuboid frame structure

High-Q terahertz bandstop filter via cuboid frame structure

Four Subbands from Dual Mismatched Wideband Bandpass Filter for 5G/WAS/Wi-Fi/WiMAX/WLAN Applications

Design of a MIM sensor using an optical resonator and GMDH algorithm for high efficiency applications

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