X-Band PPM focused wideband klystron

This paper describes the VKX-7752A klystron, a newly developed pulsed amplifier that utilizes PPM focusing. The tube produces over 125 kW of peak power with an average power of 500 W. The klystron operates at a frequency of 10 GHz with a 2% 1 dB bandwidth, and in addition provides a gain of 50 dB. The klystron was designed to provide high gain and wide electronic bandwidth. A major consideration was to provide a small, lightweight device, well suited for military airborne radar applications. By using PPM focusing, the weight of the device was held to only eight pounds.