Patent ID: 9698478
Date: 2017-07-04
CPC Classifications: H01Q

Claim:
1. An electronically-controlled steerable beam antenna with suppressed parasitic scattering, comprising: a feed line defining an axis x; and first and second arrays of electronically-controlled switchable scatterers distributed along the axis x, each of the scatterers in the first and second arrays being switchable between a high state and a low state to scatter an electromagnetic wave propagating through the feed line so as to form a steerable antenna beam; wherein each of the scatterers of the second array is configured to be phase-shifted 180° relative to a corresponding scatterer of the first array; and wherein the switchable scatterers of the first and second arrays are configured into high states and low states relative to each other so as to suppress parasitic scattering of the electromagnetic wave by the low state scatterers in the first array without suppressing the steerable antenna beam.