Review of recent microwave planar resonator-based sensors: Techniques of complex permittivity extraction, applications, open challenges and future research directions

Zakaria, Zahriladha and Al-Ahnomi, Rammah Ali Hussien and Mohd Yussof, Zulkalnain and Alhegazi, Ammar and Abd Rahman, Norhanani and Alsariera, Hussein and Althuwayb, Ayman Abdulhadi (2021) Review of recent microwave planar resonator-based sensors: Techniques of complex permittivity extraction, applications, open challenges and future research directions. Sensors, 21 (7). pp. 1-38. ISSN 1424-8220

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Official URL: https://www.mdpi.com/1424-8220/21/7/2267

Abstract

Recent developments in the field of microwave planar sensors have led to a renewed interest in industrial, chemical, biological and medical applications that are capable of performing real-time and non-invasive measurement of material properties. Among the plausible advantages of microwave planar sensors is that they have a compact size, a low cost and the ease of fabrication and integration compared to prevailing sensors. However, some of their main drawbacks can be considered that restrict their usage and limit the range of applications such as their sensitivity and selectivity. The development of high-sensitivity microwave planar sensors is required for highly accurate complex permittivity measurements to monitor the small variations among different material samples. Therefore, the purpose of this paper is to review recent research on the development of microwave planar sensors and further challenges of their sensitivity and selectivity. Furthermore, the techniques of the complex permittivity extraction (real and imaginary parts) are discussed based on the different approaches of mathematical models. The outcomes of this review may facilitate improvements of and an alternative solution for the enhancement of microwave planar sensors’ normalized sensitivity for material characterization, especially in biochemical and beverage industry applications.

Item Type:	Article
Uncontrolled Keywords:	Microwave sensor, complex permittivity extraction, biosensor application, electric field distribution; resonators
Divisions:	Faculty of Electronics and Computer Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	06 Mar 2023 09:27
Last Modified:	06 Mar 2023 09:27
URI:	http://eprints.utem.edu.my/id/eprint/26137
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