A 200 kilowatts S band klystron with TWT bandwidth capability

This paper describes the concept and design of a klystron with a novel 11-cavity structure. This tube is capable of delivering 200 kilowatts of peak power in Band S, over an unusually wide instantaneous bandwidth, equal to 10 % of the center frequency at one decibel down. This klystron has a gain of 50 decibels and an overall efficiency of 30 % over the operating bandwidth. Possible limitations due to the output circuit are considered. The novel of the solution presented in this paper is applicable to any frequency and power range.