An extremely high power, second harmonic TE21 gyro-TWT utilizing a MIG is described along with a moderately high power, fourth harmonic gyromagnetron-TWT employing a cusp gun. Self-consistent simulation results of a 500 kW, 20% efficient, 7% bandwidth, 100 kV, 25 A, second harmonic, two-stage gyro-TWT and a 40 kW, 15% efficient, 6% bandwidth, 50 kV, 5 A, π mode, fourth harmonic gyro-TWT will be presented.
Q. S. Wang,
"High power, harmonic gyro-TWTs", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15762U (1 October 1991); doi: 10.1117/12.2297815; https://doi.org/10.1117/12.2297815