Scanning antenna including a dielectric waveguide and a rotatable cylinder coupled thereto
AssigneeWaveBand Corporation
InventorsVladimir Manasson, Lev Sadovnik
Life of this patent
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Abstract
A scanning antenna includes a cylinder coupled to a dielectric waveguide into which an electromagnetic wave is launched. The cylinder includes rows of features such as recesses or stubs of differing vertical dimensions and periods. The cylinder when rotated directs the coupled radiation over a range determined by the periods of features in the rows and the rotation of the cylinder. Both transmitters and receivers are described. Benefits are described in connection with different cross section geometries to the waveguide. Also, both linear and circular polarization operations are described.
Claims18
A scanning antenna comprising a rotatable cylinder having an outer surface and a first axis, an elongated dielectric waveguide having a second axis, said cylinder and said waveguide being located in positions closely spaced from one another such that electromagnetic signals in said waveguide are coupled to said cylinder, said cylinder comprising metallic material and including at said outer surface thereof a plurality of parallel rows of surface features, each surface feature in each of said plurality of rows having like X and Y dimensions, each of said surface features in a row having a first range of X and Y dimensions different from the range of said dimensions in every other one of said rows.
Dependencies are inferred from the claim text.