Copper foil ferrite phase shifter

Claim 1

An electrical phase shifter comprising: spacer means having a cross sectional size approximating the interior dimensions of a waveguide and comprised of a ferrite toroid sandwiched between material which is a relative window to microwave energy; said toroid being centrally located in the sandwich, the perimeter of said spacer means defining the interior surface of said phase shifter, a top and bottom surface of said toroid comprising at least a portion of said interior surface; electrically conductive material means covering substantially the entire cross-sectional perimeter of said spacer means comprising a structural member which covers approximately one side of said device and a foil sheet which covers substantially the remainder of said cross-sectional perimeter including a first surface of said perimeter which includes said top surface of said toroid; a rigid plate coextensive with said first surface; a compressible member coextensive with said rigid plate overlying said first surface exterior of said foiled sheet, said rigid plate overlying said compressible member; a shrinkable tubing enclosing said phase shifter at least to encircle said electrically conductive means, said rigid plate and said compressible member and shrunk to maintain said electrically conductive means in relatively intimate contact with said spacer means; and, port means for providing electrical communication with the interior portion of said phase shifter.