Klystron Output Circuit of High Order Transverse Magnetic Mode in Coaxial Cavity Loaded with Waveguide Filter

Single gap close coaxial resonator cavity with high order TM310 mode is designed. A new structure of output rectangular waveguide with the transverse inductance filter diaphragms is also designed. The average gap impedance variation with the frequency at the six drift tube center in the cavity are simulated and calculated. It is found that the curve of average gap impedance on frequency have two peaks, it indicates that the relative bandwidth of this output circuit is larger than that of empty waveguide.