Highly sensitive miniaturized labyrinth shape circular split ring resonator (LC-SRR) based microwave sensor for low permittivity characterization applications

This article proposed a labyrinth shape circular split ring resonator (LC-SRR) based microwave sensor for material permittivity characterization at L to S-band applications. The proposed sensor achieved miniaturized dimensions of only 25 × 20 mm2 by utilizing fractal technology. This new design stra...

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Bibliographic Details
Published in:Engineering science and technology, an international journal an international journal, 2024-05, Vol.53, p.101687, Article 101687
Main Authors: Hanif, Abu, Lutful Hakim, Mohammad, Alam, Touhidul, Bais, Badariah, Alamri, Saeed, Alrashdi, Ayed M., Soliman, Mohamed S., Tariqul Islam, Mohammad
Format: Article
Language:English
Subjects:
Metamaterial
Microwave sensor
Permittivity sensor
Split ring resonator
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Summary:This article proposed a labyrinth shape circular split ring resonator (LC-SRR) based microwave sensor for material permittivity characterization at L to S-band applications. The proposed sensor achieved miniaturized dimensions of only 25 × 20 mm2 by utilizing fractal technology. This new design strategy adopts a unique and compact structure and high electromagnetic (EM) field intensity, contributing to a more precise sensing mechanism in the microwave frequency range. The design geometry achieved resonant frequency at 2.57 GHz with a notch depth of −29.5 dB. The design evolution, metamaterial characteristics, equivalent circuit model, and electric (E) and magnetic (H) fields are presented to understand the stopband characteristics at the resonant frequency. A high sensitivity of 10.50 % is achieved for the proposed sensor for the permittivity range from 1 to 2. The reflection and transmission characteristics of the proposed LC-SRR based sensor are validated by fabricating and measuring the prototype. Moreover, the sensor performance is validated using different dielectric materials (Roger RT5880, Roger RO4350B, and FR-4) The measurement results show consistency with simulation results. Finally, the miniaturized low-profile sensor structure and high sensitivity to characterize the permittivity of the material makes the proposed sensor suitable for low-permittivity sensing applications.
ISSN:2215-0986
2215-0986
DOI:10.1016/j.jestch.2024.101687