Ultra high gain of plasmonic inspired antenna and its beamforming

Plasmonic antenna is capable of replacing an array antenna producing directive high gain beam at a desired direction by structuring the metal surface with certain patterns, having characteristic dimensions on a scale much smaller than the wavelength of the microwave. Excitation of localized surface plasmon modes on structured metal surface strongly localized the microwave. This enables the metal surface to confine, guide and manipulate the microwave in an open structure through sub-wavelength apertures to produce the directive beam radiation. This paper presents the ability of a structured metal surface to manipulate microwave propagation in an open structure and to support high gain radiation of 17 dB through a sub-wavelength aperture. The CST Microwave Studio (CSTMWS) simulation tool is used to simulate and analyze the designed plasmonic antenna performance.