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المؤلفMoniruzzaman, Md
المؤلفIslam, Mohammad Tariqul
المؤلفMisran, Norbahiah
المؤلفSamsuzzaman, Md
المؤلفAlam, Touhidul
المؤلفChowdhury, Muhammad E. H.
تاريخ الإتاحة2023-04-17T06:57:45Z
تاريخ النشر2021
اسم المنشورScientific Reports
المصدرScopus
معرّف المصادر الموحدhttp://dx.doi.org/10.1038/s41598-021-91432-8
معرّف المصادر الموحدhttp://hdl.handle.net/10576/41974
الملخصAn inductively tuned modified split-ring resonator-based metamaterial (MTM) is presented in this article that provides multiple resonances covering S, C, X, and Ku-bands. The MTM is designed on an FR-4 substrate with a thickness of 1.5 mm and an electrical dimension of 0.063λ × 0.063λ where wavelength, λ is calculated at 2.38 GHz. The resonator part is a combination of three squared copper rings and one circular ring in which all the square rings are modified shaped, and the inner two rings are interconnected. The resonance frequency is tuned by adding inductive metal strips in parallel two vertical splits of the outer ring that causes a significant shift of resonances towards the lower frequencies and a highly effective medium ratio (EMR) of 15.75. Numerical simulation software CST microwave studio is used for the simulation and performance analysis of the proposed unit cell. The MTM unit cell exhibits six resonances of transmission coefficient (S21) at 2.38, 4.24, 5.98, 9.55, 12.1, and 14.34 GHz covering S, C, X, and Ku-bands with epsilon negative (ENG), near-zero permeability, and near-zero refractive index (NZI). The simulated result is validated by experiment with good agreement between them. The performance of the array of the unit cells is also investigated in both simulation and measurement. The equivalent circuit modeling has been accomplished using Advanced Design Software (ADS) that shows a similar S21 response compared to CST simulation. Noteworthy to mention that with the copper backplane, the same unit cell provides multiband absorption properties with four major absorption peaks of 99.6%, 95.7%, 99.9%, 92.7% with quality factors(Q-factor) of 28.4, 34.4, 23, and 32 at 3.98, 5.5, 11.73 and 13.47 GHz, respectively which can be applied for sensing and detecting purposes. The application of an array of the unit cells is investigated using it as a superstrate of an antenna that provides a 73% (average) increase of antenna gain. Due to its simple design, compact dimension with high EMR, ENG property with near-zero permeability, this multiband NZI metamaterial can be used for microwave applications, especially for multiband antenna gain enhancement.
راعي المشروعThis work was supported by the Ministry of Higher Education (MoHE) project grant code: FRGS/1/2019/TK04/ UKM/01/1.This work was also supported by Grant NPRP12S-0227-190164 from the Qatar National Research Fund, a member of Qatar Foundation, Doha, Qatar, and the claims made herein are solely the responsibility of the authors.
اللغةen
الناشرNature Research
الموضوعElectrical and electronic engineering
Metamaterials
العنوانInductively tuned modified split ring resonator based quad band epsilon negative (ENG) with near zero index (NZI) metamaterial for multiband antenna performance enhancement
النوعArticle
رقم العدد1
رقم المجلد11
dc.accessType Open Access


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