Demonstration of a G Band Fillet-trapezoidal Staggered Double-gateTraveling Wave Tube

In order to obtain wider bandwidth, a novel slow-wave structure named a fillet-trapezoidal staggered double-gate (FTSDG) slow-wave structure (SWS) is proposed. This structure can reduce the transmission loss and machining difficulty of slow-wave parts without reducing the coupling impedance, and can easily meet the design requirements in machinability. In this paper, the high frequency structure characteristics of G-band FTSDG slow-wave structure TWT are analyzed. The two-stage slow-wave structure combined with phase velocity jump scheme is adopted, and the simulation results of output power greater than 35.3 W are obtained in the frequency range of 205 GHz to 230 GHz.