Design Of Microwave Resonator Sensor For Material Characterization

Ahmad Tajuddin, Arifah Nabilah (2016) Design Of Microwave Resonator Sensor For Material Characterization. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In the last few years, several designs of the microwave resonator, which has satisfied various objectives, have been proposed for materials characterization. Special attention is devoted to resonance techniques that are more accurate and sensitive compared to the transmission-reflection methods. Material characterization using Microwave resonant sensor is considered one of the most accurate way to obtain material properties. Resonant method usually has higher accuracy and sensitivity than other methods, and it is convenient for low loss materials. A review of dielectric material properties and currently available measurement methods is included. Enhanced coupling ring resonant with 1.2 GHz microstrip design is presented for the measurement of thin and low-loss materials such as FR4, Roger 4350 and Roger 5880. This design is based on electromagnetic simulation in terms of resonant frequency, quality factor and permittivity. Design, simulation, fabrication and measurement process are illustrated in this study. Comparison between simulation and measurement results is shown in this study. In this paper, enhanced coupling ring resonator sensor is proposed as a suitable component for performance enhancement of microwave sensors. This sensor has been employed for enhancing the insertion loss of the microwave sensors. Using the same device area, we can achieve a high Q-factor of 209.11 from the periphery enhancement using enhanced coupling ring. Resonant frequency at 1st, 2nd, 3rd, and 4th harmonics have been completely suppressed well above -20 dB rejection level without visible changes in the passband filter characteristics. The most significant of using enhanced coupling ring is to be used for various industrial applications such as food industry, quality control, bio-sensing medicine and pharmacy. It also provides useful information to improve the design, processing, quality and control of product. The simulation result that device is a viable candidate for the performance enhancement of microwave sensors has been verified.

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