Fig. 1. Beam-wave interaction system of the clinotron

Fig. 2. Structure diagram of the double corrugated waveguide SWS

Fig. 3. Solid model of one single period slow wave structure (SWS) in CST

Fig. 4. Comparison of calculation and simulation dispersion curves in the SWS

Fig. 5. Coupling impedance of the SWS

Fig. 6. Calculation point of coupling impedance

Fig. 7. Interaction section of clinotron solid model in CST

Fig. 8. Sheet beam cross section in CST model

Fig. 9. Electron bunching at the end of the interaction section

Fig. 10. Operating frequency versus beam voltage

Fig. 11. Simulated output power in CST

Fig. 12. Electric field versus time

Fig. 13. Simulated output power

Fig. 14. Frequency spectrum through FFT (370.5 GHz)

Fig. 15. Frequency spectrum through FFT (397 GHz)