| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 105 === Research on metasurfaces has been widespread recently because they have strong potential in several fields such as optics, photonics, antennas, sensing, imaging, and spectroscopy. The metasurface is able to exude unusual properties which natural materials or ordinary structures do not possess. In this thesis, we use a periodic array of square metallic patches etched on a grounded dielectric substrate to synthesize a flat 2D Luneburg lens which is used as a surface-wave antenna. No surface wave launcher is required by this meta-lens, which would otherwise add to space and weight. We calculate the various sub-efficiencies of aperture area that collectively characterize the quality of the radiating aperture, which is bounded only by one surface but exploits the exterior free-space above the metasurface to make up the rest of the boundaries, resulting in an essentially material-less aperture that is consequently light, low-profile, compact and also cheaper to manufacture. The design is validated by simulation results.
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