NESTED CIRCULAR ELLIPTICAL SHAPED MIXED LOOP RESONATOR BASED BANDPASS FILTER FOR MICROWAVE APPLICATIONS / PENAPIS JALUR BERASASKAN CAMPURAN GEGELUNG PENYALUN BERBENTUK SARANG BULAT UNTUK APLIKASI GELOMBANG MIKRO

An elliptical thumb printed nested circular mixed loop resonator (MLR) is introduced in this article to design a multiple bandpass filter for microwave applications. The proposed structure is composed of a series of loop resonators on a Rogers RT-5880 dielectric substrate, where the overall system is developed into a 377Ω framework. Similar structure is designed on both sides of the substrate and an investigation is made on scattering parameters, relative permittivity, permeability, refractive index and current distributions. The 12 ´ 14 mm2 structure is designed and evaluated by a simulation software CST microwave studio and the metamaterial characteristics have been classified by Nicolson-Ross-Weir method at the filtering frequencies. The proposed filter shows resonances at 2.65 GHz, 5.85 GHz, 7.12 GHz, and 8.59 GHz, and the measured results are compared with the simulated ones. With a favorable design and double-negative characteristics, this design is suitable for multiple bandpass filter particularly for S, C, and X-band applications.

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Wideband Negative Permittivity and Double Negative Fishnet-Mushroom-Like Metamaterial in X-Band Waveguide

Advances in Condensed Matter Physics ◽

10.1155/2017/2439518 ◽

2017 ◽

Vol 2017 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Ahmed Mahmood ◽

Golge Ogucu Yetkin ◽

Cumali Sabah

Keyword(s):

Dielectric Substrate ◽

Negative Permittivity ◽

Negative Permeability ◽

Double Negative ◽

Characteristic Parameters ◽

Electromagnetic Band Gap ◽

Left Handed ◽

X Band ◽

Metallic Parts ◽

Good Agreement

A Fishnet-Mushroom-like metamaterial electromagnetic behaviour is represented in S-parameters numerically and experimentally for X-band frequencies arena. The design has introduced a dielectric substrate as a host with metallic parts. The proposed design is predicted to provide the electromagnetic band gap characterization with desired reiterative characteristic parameters, negative permittivity, and negative permeability exhibiting a double negative left-handed region, which is identified with the X-band regime with good agreement between the simulated and the measured results.

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An octagonal split ring resonator-based double negative metamaterial for S-, X- and Ku-band applications

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/14644207211017155 ◽

2021 ◽

pp. 146442072110171

Author(s):

Ismatul N Idrus ◽

Mohammad RI Faruque ◽

Sabirin Abdullah ◽

Mohammad T Islam ◽

Mayeen U Khandaker ◽

...

Keyword(s):

Resonance Frequency ◽

Satellite Communication ◽

Dielectric Substrate ◽

Split Ring Resonator ◽

Circular Ring ◽

New Combination ◽

Double Negative ◽

X Band ◽

Resonance Frequencies ◽

Ku Band

This study aimed to produce a miniaturised double negative metamaterial with a lower resonance frequency. Therefore, a new combination of a multi-circular ring connected with octagonal shape ring metamaterial was developed on a 9 × 9 mm2 dielectric substrate material with a thickness of 1.6 mm, named the Flame Retardant 4 (FR-4). While the selected frequency ranged between 0 and 18 GHz for the unit and array metamaterial design. Numerical simulation was used for the design and analysis of the proposed metamaterial. A few analysis were performed to validate the performance of the new design including the analyses of the different dimensions of the substrate and varying widths of the split gaps. The proposed design structure manifested resonance frequencies at S, X and Ku-bands. The resonance frequency at S-band (3.31 GHz) and X-band (8.60 GHz) presented double-negative (DNG) metamaterial behaviour while X-band (11.93 GHz) and Ku-band (12.99 GHz) presented single-negative (SNG) medium characteristics. The simulation and measured results almost coincided with each other. The compactness of the proposed design was proven by the effective medium ratio (EMR) of 10.07. In conclusion, the miniaturised structure can be accredited for satellite communication and radar applications.

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An X-band Wide Beamwidth CP Antenna Design with Extended Structure of Dielectric Substrate*

2019 International Applied Computational Electromagnetics Society Symposium - China (ACES) ◽

10.23919/aces48530.2019.9060748 ◽

2019 ◽

Author(s):

Hong Jing ◽

Wenxi Hao ◽

Hui Ning ◽

Zijian Zong

Keyword(s):

Dielectric Substrate ◽

Antenna Design ◽

Extended Structure ◽

X Band

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A contribution to evaluation of influence of medium in electronic and infrared spectroscopy

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19821060 ◽

1982 ◽

Vol 47 (4) ◽

pp. 1060-1068 ◽

Cited By ~ 25

Author(s):

Vojtěch Bekárek ◽

Jan Juřina

Keyword(s):

Refractive Index ◽

Infrared Spectroscopy ◽

Correlation Coefficient ◽

Solvent Effects ◽

Electronic Spectra ◽

Relative Permittivity ◽

Solvent Parameters

Dependence of ET(30) of solvent parameters on relative permittivity (ε) and refractive index (n) of solvent has been found for forty solvents in the form ET(30)=29.87 + 72.03 (ε - 1/(2ε + 1)-29.16(ε - 1) (n 2 - 1)/(2ε + 1) (2n2 + 1), the correlation coefficient being 0.958. Relation has been discussed between ET(30) and π solvent parameters and significance of the term (ε - 1). (n2 - 1)/(2ε + 1) (2n2 + 1) has been tested for evaluation of solvent effects in electronic spectra.>

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Realization of frequency hopping characteristics of an epsilon negative metamaterial with high effective medium ratio for multiband microwave applications

Scientific Reports ◽

10.1038/s41598-021-96228-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Mohammad Tariqul Islam ◽

Md. Moniruzzaman ◽

Touhidul Alam ◽

Md Samsuzzaman ◽

Qutaiba A. Razouqi ◽

...

Keyword(s):

Refractive Index ◽

Low Cost ◽

Frequency Hopping ◽

Small Dimension ◽

Effective Medium ◽

Unit Cell ◽

Negative Permittivity ◽

Design System ◽

Microwave Applications ◽

Meander Line

AbstractIn this paper, a meander-lines-based epsilon negative (ENG) metamaterial (MTM) with a high effective medium ratio (EMR) and near-zero refractive index (NZI) is designed and investigated for multiband microwave applications. The metamaterial unit cell is a modification of the conventional square split-ring resonator in which the meander line concept is utilized. The meander line helps to increase the electrical length of the rings and provides strong multiple resonances within a small dimension. The unit cell of proposed MTM is initiated on a low-cost FR4 substrate of 1.5 mm thick and electrical dimension of 0.06λ × 0.06λ, where wavelength, λ is calculated at the lowest resonance frequency (2.48 GHz). The MTM provides four major resonances of transmission coefficient (S21) at 2.48, 4.28, 9.36, and 13.7 GHz covering S, C, X, and Ku bands. It shows negative permittivity, near-zero permeability, and near-zero refractive index in the vicinity of these resonances. The equivalent circuit is designed and modeled in Advanced Design System (ADS) software. The simulated S21 of the MTM unit cell is compared with the measured one and both show close similarity. The array performance of the MTM is also evaluated by using 2 × 2, 4 × 4, and 8 × 8 arrays that show close resemblance with the unit cell. The MTM offers a high effective medium ratio (EMR) of 15.1, indicating the design's compactness. The frequency hopping characteristics of the proposed MTM is investigated by open and short-circuited the three outer rings split gaps by using three switches. Eight different combinations of the switching states provide eight different sets of multiband resonances within 2–18 GHz; those give the flexibility of using the proposed MTM operating in various frequency bands. For its small dimension, NZI, high EMR, and frequency hopping characteristics through switching, this metamaterial can be utilized for multiband microwave applications, especially to enhance the gain of multiband antennas.

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