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We numerically investigate the performance of rectangular patch antenna combined with fishnet metamaterial as superstrate for enhanced directionality. The gain of the antenna is improved further by suppressing surface wave in the substrate by using two different methods (1) partial removal of substrate around the patch and (2) mushroom type electromagnetic (EBG) structure. In either case overall gain...
We report a new structure of metamaterial, consisting of an array of double concentric rings and cross stripes of metal film separated by a dielectric layer. Using Finite Integration Technique, its properties are investigated; the metamaterial exhibits left handed behavior for both linear as well as circular polarization. Further the metamaterial is used as a cover to improve the directionality of...
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