Real time microwave biochemical sensor based on circular SIW approach for aqueous dielectric detection.

Zakaria, Zahriladha and Md Arshad, Mohd Khairuddin and Awang Md Isa, Azmi and Dasril, Yosza and Al- Ahnomi, Rammah Ali Hussein and Mohd Bahar, Amyrul Azuan (2019) Real time microwave biochemical sensor based on circular SIW approach for aqueous dielectric detection. Scientific Reports, 9 (1). pp. 1-12. ISSN 2045-2322

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Abstract

In this study, a critical evaluation of analyte dielectric properties in a microvolume was undertaken, using a microwave biochemical sensor based on a circular substrate integrated waveguide (CSIW) topology. These dielectric properties were numerically investigated based on the resonant perturbation method, as this method provides the best sensing performance as a real-time biochemical detector. To validate these fndings, shifts of the resonant frequency in the presence of aqueous solvents were compared with an ideal permittivity. The sensor prototype required a 2.5µL volume of the liquid sample each time, which still ofered an overall accuracy of better than 99.06%, with an average error measurement of ±0.44%, compared with the commercial and ideal permittivity values. The unloaded Qu factor of the circular substrate-integrated waveguide (CSIW) sensor achieved more than 400 to ensure a precise measurement. At 4.4GHz, a good agreement was observed between simulated and measured results within a broad frequency range, from 1 to 6GHz. The proposed sensor, therefore, ofers high sensitivity detection, a simple structural design, a fast-sensing response, and cost-efectiveness. The proposed sensor in this study will facilitate real improvements in any material characterization applications such as pharmaceutical, bio-sensing, and food processing applications

Item Type:	Article
Uncontrolled Keywords:	Ring Resonator, Microwave Sensors, Metamaterials
Divisions:	Faculty of Electronics and Computer Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	09 May 2022 14:44
Last Modified:	21 Sep 2026 01:25
URI:	http://eprints.utem.edu.my/id/eprint/24817
Statistic Details:	View Download Statistic

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