Effects on Resonant Parameters of Split-Ring Resonator Due to Flowing Polar Liquids

Abstract

In this research, a novel mechanism has been presented which was devised to analyze the effects on resonant behavior of a non-planar split-ring resonator due to flowing polar liquids. Shifts in resonant behaviors have been observed when materials are placed in the gap of a split-ring resonator due to perturbation of electromagnetic fields. However, such study has been organized for materials under static conditions. For such study on liquids, these are contained in microcapillary tubes and placed in resonator gap. Present work has been organized to perform sensitivity analysis of resonant behavior due to flowing polar liquids through resonator gap. For simulation on HFSS, the illustration of flowing liquid through a micro-capillary tube was arranged at different column lengths of liquids (inside the micro-capillary tube). The flow was simulated by using optimetrics and parametric setups. Effects of flow, liquid placed at various points, were then analyzed for shifts in the quality factor and resonant frequency of the split-ring resonator. Simulations were organized for dimethyl sulphoxide, methanol and distilled water. Results and analysis have been presented for this study. The results show extremely sensitive characterization and are in close agreement with the theoretical and simulated results. Later on, the proposed design was fabricated and then tested with Vector Network Analyzer (VNA) in order to endorse the computer-generated results. The analysis and comparisons were carried out for three different flowing conditions of the liquids under test namely static liquid, liquid in full flow (insertion nozzle fully opened) and half flow (insertion nozzle half opened). The comparisons and analysis depict that the experimentation results are in close agreement with the results obtained from simulations. Hence the extractions from simulation have been justified with the help of experimentation. The shift in the two parameters, quality factor ‘Q’ and resonant frequency ‘fr ’ of the split ring resonator (SRR) are calculated for different flowing condition of the liquids.