Dynamic Polarization and Coupling Control of a Steerable Cylindrical-Fed Holographic Antenna
An antenna and feeding technology, applied in the antenna field, can solve the problem of sacrificing beam performance and dynamic polarization control
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[0033] Embodiments of the invention include antenna design architectures that feed the antenna from a central point with an excitation (feed wave) that spreads out from the feed point in a cylindrical or concentric fashion. The antenna works with a feed wave by arranging multiple cylindrical feed sub-aperture antennas (eg patch antennas). In an alternative embodiment, the antenna is fed in from the perimeter rather than from the center out. This can help because it counteracts the amplitude excitation decay caused by the energy scattered by the aperture. Scattering occurs similarly in both orientations, but the natural cone caused by focusing the energy in the feed wave as the feed wave travels inward from the periphery counteracts the regressive cone caused by intentional scattering.
[0034] Embodiments of the invention include holographic antennas based on doubling the density typically required to achieve holography and filling holes with two types of orthogonal sets of e...
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