Microwave fluidic sensor using enhanced coupling peripheral Microstrip split-ring resonator sensor

In this paper, a new type of microwave fluidic sensor using enhanced coupling peripheral microstrip split-ring resonator is studied in order to analyze the effect of Q-factor and insertion loss with several common liquids. The technique is based on perturbation theory, in which the resonant frequency and Q-factor of the microwave resonator depend on the dielectric properties of the resonator. A Microstrip split-ring resonator with two gaps is implemented for the design of the sensors. Several types of solvents are tested with quartz capillary to verify the sensor performance by simulation. At 2.4 GHz, the split-ring resonator demonstrates significant changes in resonant frequency. Finally, a comparison between previous research works is performed in order to evaluate the effectiveness of resonator sensors for the development of material characterization industry.