New design methodology for high-quality and low-cost microwave resonator

Abstract

Microwave sensor designs offer unique advantages, including low cost, compact size, and high accuracy. In this context, they play critical roles in various fields, including health, the food industry, and defense. Resonance-based microwave resonator design constitutes an important class of sensors due to their superior sensitivity and accuracy. This study proposes a reproducible and feasible microwave resonator design with the potential to characterize samples. This resonator has the potential to achieve detection through a shift in the resonant frequency and/or a change or deterioration in the quality factor after the sample is placed in the resonator. As a result of the literature review, it has been identified that the quality factor (Q-factor), depth of transmission/reflection scattering parameters, and structural simplicity are critical performance parameters for the proposed design. Moreover, these parameters pose potential limitations and drawbacks in the sensors presented in the literature. The proposed transmission-based sensor design exhibits better performance compared to sensors available in the literature, with an approximately 2.66 GHz resonance frequency and a −61.54   value. The proposed microwave resonator design can be preferred in industry and sensing applications.