Design and simulation of the high-frequency structure for a G-band extended interaction klystron

摘要

The G-band spectrum has been demonstrated to be the frequency of the next generation of space-borne and ground-based cloud radar for its higher spatial resolution. Extended interaction klystron (EIK) is one of the most suitable sources for the radar due to its longer lifetime and higher power compared with similar devices. The design and particle simulation of high-frequency structure for G-band EIK are presented in this study. The structure employs multiple resonant cavities, and each cavity adopts the ladder-type multi-gap structure. The cavities are operating at 2?? mode considering the machinability. The simulation result indicates that the amplifier could generate a power of 125 W at 237.5 GHz when driven by a 20 kV, 200 mA round beam and 100 mW input power. This work will be of great potential to develop the G-band EIK with power above 100 W.