Patent ID: 7173577
Filing Date: 2007-02-06
Classification: H01Q

Abstract:
1. A phased array antenna having a frequency selective surface, comprising: a substrate and an array of antenna elements thereon, each antenna element comprising a medial feed portion and a pair of legs extending outwardly therefrom, adjacent legs of adjacent antenna elements including respective spaced apart end portions; at least one fluidic dielectric having a permittivity and a permeability residing within at least one cavity within the substrate and arranged between a plane where the array of antenna elements reside and a ground plane; at least one composition processor adapted for dynamically changing a composition of said fluidic dielectric to vary at least one of said permittivity and said permeability in said at least one cavity; and a controller for controlling said composition processor to selectively vary at least one of said permittivity and said permeability in at least one cavity in response to a control signal.