Modulation patterns for surface scattering antennas
First Claim
Patent Images
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 hologram function corresponds to a selected antenna pattern having a main beam with a selected direction and phase, and the identifying of the antenna configuration includes;
altering the hologram function to correspond to a new antenna pattern having a new main beam with an new direction and phase, the new direction and phase being selected to optimize a desired cost function for the new antenna pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
Modulation patterns for surface scattering antennas provide desired antenna pattern attributes such as reduced side lobes and reduced grating lobes.
109 Citations
28 Claims
-
1. A method, comprising:
-
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 hologram function corresponds to a selected antenna pattern having a main beam with a selected direction and phase, and the identifying of the antenna configuration includes; altering the hologram function to correspond to a new antenna pattern having a new main beam with an new direction and phase, the new direction and phase being selected to optimize a desired cost function for the new antenna pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A system, comprising:
-
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 a discretization of an altered hologram function corresponding to a new antenna pattern having a new main beam with a new beam direction or phase different than an original beam direction or phase for an original main beam of an original antenna pattern corresponding to the respective hologram function, the new beam direction or phase optimizing a desired cost function for the antenna configuration. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A method of controlling a surface scattering antenna with a plurality of adjustable scattering elements, comprising:
-
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 a discretization of an altered hologram function corresponding to a new antenna pattern having a new main beam with a new beam direction or phase different than an original beam direction or phase for an original main beam of an original antenna pattern corresponding to the hologram function, the new beam direction or phase optimizing a desired cost function for the antenna configuration. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
-
Specification