Tuning characteristics of Gunn diode in conical-section waveguide mounts

The Bialkowski approach as extended by Bates is applied to solve for the driving-point impedance for a conical cap waveguide mount of arbitrary angle of taper. As an application of the driving-point impedance model, a Gunn diode oscillator was designed and its tuning characteristics using two such waveguide mounts were measured. The predicted and experimental results agree closely.