Design Note on a Serrated Choke (Correspondence)

The serrated choke described by Dr. Kiyo Tomiyasu and J. J. Bolus is a very effective device to employ whenever long cuts or gaps are present on the walls of rectangular waveguide. This communication is concerned with the application of a serrated choke to an X-band waveguide ring switch, wherein the waveguide was split longitudinally at opposite corners to form a rotor section and a stator section.