Fig. 1. The structure diagram of Backward Wave Oscillator

Fig. 2. Improved structure processing and assembly of flatgrating

Fig. 3. The schematic diagram of 1 THz Backward Wave Amplifier

Fig. 4. The schematic diagram of the structure of 1 THz Backward Wave Amplifier and its processing and assembly conditions

Fig. 5. The schematic diagram of the radial electron beam Backward Wave Oscillator structure and eigenmode field distribution

Fig. 6. Novel terahertz spiral interaction structure

Fig. 7. Folded waveguide interaction structure，quasi-parallel flat-plate interaction structure and staggered double-grating interaction structure

Fig. 8. Novel interaction structure Backward Wave Oscillator

Fig. 9. Structure and experiment of Pseudospark Backward Wave Oscillator

Fig. 10. The schematic diagram of Traveling Wave Tube

Fig. 11. High-power Traveling Wave Tube in different bands

Fig. 12. Two solutions for high-power Traveling Wave Tube

Fig. 13. 0.34 THz folded waveguide Traveling Wave Tube

Fig. 14. Novel structure Traveling Wave Tube

Fig. 15. 1 THz spiral slow-wave structure based on self-guided assembly of nano-membrane devices

Fig. 16. Folded waveguide harmonic Traveling Wave Tube

Fig. 17. Trapezoidal interaction structure Extended Interaction Oscillator

Fig. 18. Folded waveguide Extended Interaction Oscillator

Fig. 19. 0.264 THz Extended Interaction Oscillator

Fig. 20. Structure and dispersion of harmonic Extended Interaction Oscillator

Fig. 21. G-band and W-band Extended Interaction Klystron

Fig. 22. Banded electron beam W-band Extended Interaction Klystron

Fig. 23. Photonic crystal Extended Interaction Klystron

Fig. 24. Unequal-length Slots interaction structure

Fig. 25. The schematic diagram of Gyrotron structure

Fig. 26. Pulsed magnetic field Gyrotron

Fig. 27. 500 GHz second harmonic Gyrotron

Fig. 28. Gyrotron system for different application scenarios

Fig. 29. Innovative structure Gyrotron and Gyrotron amplifier

Fig. 30. Two types of W-band spatial harmonic Magnetrons

Fig. 31. Spatial harmonic Magnetrons in terahertz band

Fig. 32. The schematic diagram of Clinotron

Fig. 33. Processing and assembly of 0.26 THz Clinotron

Fig. 34. Experimental research of 0.346 THz Clinotron

Fig. 35. W-band Orotron schematic and experimental diagram

Fig. 36. The schematic diagram of super-radiation Orotron structure

Fig. 37. The schematic and assembly diagram of super-radiant Orotron

Fig. 38. The schematic diagram of the interaction structure and experimental results of super-radiant Orotron

Fig. 39. The structure and simulation results of special type super-radiant Orotron