Patent ID: 6756866
Filing Date: 2004-06-29
Classification: H01P,H01Q

Abstract:
A rectangular waveguide for shifting the phase of a signal transmitted through the, waveguide, comprising:a waveguide comprising a top wall, a bottom wall and two sidewalls; and at least one pair of opposing impedance wall structures, with one of said at least one pair being on said top wall and bottom wall, or said sidewalls, or both, each of said wall structures presenting an alterable surface impedance to transmitted signals of said waveguide, each of said wall structures presenting a high impedance to a resonant frequency signal transmitted by said waveguide, said surface impedance being alterable to cause the phase of said resonant frequency signal to change, wherein said wall structures present high impedance resonant L-C circuits to said resonant frequency signal, said impedance being alterable to present a primarily inductive impedance to said resonant frequency signal.