Research on the Length Design of Three-section Cylindrical Waveguide Resonator

The resonator is the place where the beam wave interaction occurs in the gyrotron. For the gyrotron with a three-section cylindrical waveguide resonator, the length of each section has different effects on the resonant frequency, quality factor, field distribution, etc. of the resonator. In this paper, the length design of the input section, output section, input transition section, output transition section and interaction section of the three-section cylindrical waveguide resonator working in 140GHz, TE28,8 mode is studied, and the influence of the length of each section on the performance of the resonator is analyzed, thus one reasonable length design of each section is given.