metamaterial Resonance Frequency Correlation with Negative Refractive Index and Impedance in SRR Structures
Abstract
Abstract: This paper underlines the need to improve SRR cell design parameters to achieve both a negative refractive index and optimal impedance matching for advanced metamaterial applications. Metamaterials have unique light manipulation characteristics because of their negative refractive index and excellent impedance matching. This paper looks at numerous split-ring resonator (SRR) cell designs to find the best combinations. Square SRR cells consistently achieved a negative refractive index and excellent impedance matching throughout simulations, outperforming alternative forms such as circular SRRs. Increasing strip width often improves the negative refractive index, although it may create dispersion. Optimal separation distance resulted in a negative refractive index and perfect impedance for particular SRR forms (SSRR, HSRR, and OSRR); however, CSRR designs degraded with greater separations. All SRR forms produced satisfactory results, however CSRR designs had a somewhat poorer performance. Notably, a greater outer side (a = 22mm) SSSR cells resulted in a much higher negative refractive index throughout varying strip widths and separation distances.
References
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