Sıfıra Yakın İndeksli Ayrık Halka Resonatörü: Lens Anten

Abstract

In this study, a matematerial structure, which consists of rectangular split ring resonator arrays, is investigated numerically and experimentally in the frequency range from 1 GHz to 5GHz. FR-4 material is used as the substrate material due to its low cost. During the numerical analysis (simulation analysis), a parametric study is performed to determine the optimal dimension of the unit cell structure. S11 (reflection coefficient), S21 (transmission coefficient), and n (refractive index) are examined in the frequency range of interest. As a result of the parametric study, the value of n is obtained as approximately zero. By increasing the split ring width, nearzero index is observed at higher frequencies. Hence, it is also deduced that the metamaterial structure behaves as a super lens antenna at the related frequency. Numerical analysis is performed via CST Microwave Studio (MWS). The simulation results are confirmed with experimental results obtained by network analyzer.