Patent ID: 6281766
Filing Date: 2001-08-28
Classification: H01P,H01Q

Abstract:
A waveguide phase shifter comprising:a waveguide having a control port, said control port comprising a void in a wall of said waveguide;a dielectric vane at a first position relative to a first reference surface, said first position being within said waveguide; andan actuator coupled to said waveguide and coupled to said dielectric vane through said control port, said actuator changing said first position using a plurality of stacks of potable ferroelectric ceramic material, at least one stack of said plurality of stacks comprising at least two piezoelectric wafers comprised of a respective potable ferroelectric ceramic material selected from a group consisting of lead-titanate (PbTiO.sub.3), lead-zirconate (PbZrO.sub.3), barium-titanate (BaTiO.sub.3), and lead-zirconate-titanate (PbZr.sub.x Ti.sub.1-x O.sub.3), where x is between zero and one.