Abstract
In this paper, metamaterial superstrate is proposed to enhance the performance parameters of conventional rectangular microstrip patch antenna. The metamaterial is designed using proposed diagonally connected square split ring resonator (DC SSRR). The designed DCS SRR shows the negative values of refractive index for broadband frequency band, 5.0 GHz to 12 GHz. Use of metamaterial superstrate on conventional rectangular microstrip antenna improves the return loss by 18 dB and enhances the gain, bandwidth and radiation efficiency by 1.2 dBi, 28 MHz and 17.5% respectively. The permittivity, permeability and refractive index of metamaterial are numerically computed using MATLAB. All performance parameters of antenna and S-parameters of DC SSRR are obtained using commercially available full wave electromagnetic simulator HFSS based on finite element method and verified by measured results. Good agreement is found between simulated and measured results.
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