A high power TE31 gyro-BWO utilizing a MIG is described which will yield continuous tuning over a full band. The interaction tube has been severed to destroy all modes without a threefold azimuthal symmetry.
G. Vasilakos, G. Vasilakos,
"100 kw, 46-63 GHz severed gyro-BWO", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15763U (1 October 1991); doi: 10.1117/12.2297851; https://doi.org/10.1117/12.2297851