Design of planar microwave sensor resonator for material characterization

Lim, Qi Jeff (2022) Design of planar microwave sensor resonator for material characterization. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, microwave sensor are gaining popularity in applications of food industry, agriculture and biomedical. Among the potential techniques, microwave resonant technique has been commonly applied in dielectric material characterization measurement. Conventionally, non-planar sensors such as waveguide, dielectric and coaxial resonators which provide high sensitivity and accuracy are being used in the measurement. However, the sensors have drawbacks including bulky in size, high cost manufacturing and consume high volume for detection of the previous sample of material under test (MUT). Hence, planar microwave resonator sensors which are compact in size, low cost and ease of fabrication are invented. However, the planar sensors suffer with low sensitivity and Q-factor value which limits the range for material characterization. As a result, this project designs a planar microwave sensor resonator with the operating frequency between 2GHz and 5GHz via computer simulation technology (CST) software and overcome the weakness of the sensor. The design of the structure resonator based on the mathematical equation and optimization of the parameter value.

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