Progress of an S-band high average power broadband multi-beam klystron

An S-band high average power MBK producing peak power of 500kW and average power of 30 kW over 10% of relative bandwidth has been designed in Institute of Electronics, Chinese Academy of Sciences (IECAS). Two klystrons are manufactured and have been well tested. Fundamental mode was chosen for RF interaction system, and both calculation and experimental results will also be addressed in this paper.