Design of a 0.67THz Folded Waveguide TWT

A design of 0.67THz folded waveguide TWT (FWTWT) is presented in this paper aims to develop a compact, efficient and reliable THz source and boost the application of THz. Slow-wave circuit, electron transmission system and energy coupling structure are designed with deep theoretical analysis and numerical simulation. The result shows, the maximum output power is 158mW and the maximum gain is 22dB with more than 10GHz of −3dB bandwidth.