Patent ID: 7193488

Claim:
An R switch for switching connections between microwave waveguides, comprising: a stator having an interior cavity and four connection openings communicating with said interior cavity, each of said connection openings being respectively disposed on one of four side surfaces of said stator, said side surfaces being arrange in opposing pairs, said connection openings being configured to connect to the microwave waveguides; a rotor rotatably disposed in the interior cavity; said rotor having a centrally disposed straight interconnection configured to interconnect opposing ones of said connections openings when said rotor is positioned at a first rotation position; said rotor having first and second curved interconnections respectively disposed on opposing sides of the straight interconnection, said first curved path being configured to interconnect first and second connection openings of said connection openings which are disposed on adjacent ones of said four side surfaces when said rotor is positioned at a second rotation position different than said first rotation position, said second curved interconnection being configured to interconnect third and fourth connection openings of said connection openings which are disposed on other adjacent ones of said four side surfaces when said rotor is positioned at said second rotation position; the straight interconnection being constructed as a step transformer, the straight interconnection having end openings, first and second opposing walls, and third and fourth opposing walls, and extending in a longitudinal direction between said end openings, and the step transformer of the straight interconnection being formed by opposing first and second steps on said first and second walls, and said first and second steps defining recess spaces between longitudinally extending step sides of said first and second steps and at least one of said third and fourth walls opposing said longitudinally extending sides.