Resonant Behavior Analysis of Split-Ring Resonator Due to Positional Change of Dielectric Material

Abstract

In this research, a novel mechanism has been presented which was devised to analyze the effects on resonant behavior of a split-ring resonator due to the movement of the dielectric material. Shifts in resonant behaviors have been observed when materials are placed in the gap of a splitring resonator due to perturbation of electromagnetic fields. Previous work has been carried out for static dielectrics. For such study, the dielectric material placed in resonator gap and its effect has been analyzed. Present work has been organized to perform analysis of resonant behavior due to movement of dielectric through resonator gap. For simulation on HFSS, dielectric movement through the resonator was arranged at different positions i.e. from the inner edge to the outer edge. The movement was simulated by using optimetrics and parametric setups. Effects of dielectric placed at various points, were then analyzed for shifts in the quality (Q) factor and resonant frequency‘fr ’ of the split-ring resonator. Simulations were organized for Rubber and Nylon66. Results and analysis have been presented for this study. The results show shift in resonant parameters in correspondence with the theoretical and simulated results. Later on, the proposed design was fabricated and then tested with Vector Network Analyzer (VNA) in order to verify the computer-generated results. The analysis and comparisons were carried out for the two dielectric materials placed at various points of the resonator. 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, Q-factor and resonant frequency of the split ring resonator (SRR) are calculated for different positions of the resonator. The SRR is designed to possess a resonant frequency of about 3 GHz.