Modulation patterns for surface scattering antennas
First Claim
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1. A method, comprising:
- discretizing a hologram function for a surface scattering antenna that defines an aperture, where the discretizing includesidentifying a discrete plurality of locations on the aperture for a discrete plurality of scattering elements of the surface scattering antenna andidentifying a discrete set of states for each of the scattering elements corresponding to a discrete set of function values at each of the locations of the scattering elements; and
identifying an antenna configuration that reduces artifacts attributable to the discretizing, wherein the identifying of the antenna configuration includes applying an error diffusion algorithm to the discretized hologram function.
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Abstract
Modulation patterns for surface scattering antennas provide desired antenna pattern attributes such as reduced side lobes and reduced grating lobes.
117 Citations
44 Claims
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1. A method, comprising:
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discretizing a hologram function for a surface scattering antenna that defines an aperture, where the discretizing includes identifying a discrete plurality of locations on the aperture for a discrete plurality of scattering elements of the surface scattering antenna and identifying a discrete set of states for each of the scattering elements corresponding to a discrete set of function values at each of the locations of the scattering elements; and identifying an antenna configuration that reduces artifacts attributable to the discretizing, wherein the identifying of the antenna configuration includes applying an error diffusion algorithm to the discretized hologram function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system, comprising:
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a surface scattering antenna with a plurality of adjustable scattering elements that are adjustable between a discrete set of states corresponding to a discrete set of function values at each location in a plurality of locations for the plurality of adjustable scattering elements; a storage medium on which a set of antenna configurations corresponding to a set of hologram functions is written, each antenna configuration being selected to reduce artifacts attributable to a discretization of the respective hologram function; and control circuitry operable to read antenna configurations from the storage medium and adjust the plurality of adjustable scattering elements to provide the antenna configurations; wherein at least one antenna configuration is an error-propagated discretization of the respective hologram function. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of controlling a surface scattering antenna with a plurality of adjustable scattering elements, comprising:
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reading an antenna configuration from a storage medium, the antenna configuration being selected to reduce artifacts attributable to a discretization of a hologram function; and adjusting the plurality of adjustable scattering elements to provide the antenna configuration; wherein the adjustable scattering elements are adjustable between a discrete set of states corresponding to a discrete set of function values at each location in a plurality of locations for the plurality of adjustable scattering elements; and wherein the antenna configuration is an error-propagated discretization of the hologram function. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification