A 30 GHz, 500 W klystron amplifier for satellite earth stations

A 30 GHz, 500 W, six-cavity klystron amplifier has been developed for use in satellite communication earth stations. The cavity circuits and the electron beam are computer optimized for RF performance while achieving thermal stability. To obtain long lifetimes, a very high area-convergence electron gun has been designed for low cathode-density. The klystron provides 400/500 W CW output power with 200/150 MHz 1 dB bandwidth. For rapid and precise changes in operating channels, a microcomputer controlled channel tuning mechanism is adaptable to the individual cavity. The tube employs lightweight permanent magnet focusing and is wholly air cooled.