A light-weight, ruggedized klystron amplifier for space applications

The tube described in this paper is a fixed-frequency, 4-cavity amplifier which uses electrostatic fields exclusively to focus the electron beam. To this end, annular lens electrodes are arranged between the cavities. These lenses are operated at cathode potential and are therefore electrically connected to the cathode inside the vacuum envelope. Ungridded rf gaps allow excellent beam transmission, high efficiency and a low noise figure. The klystron is of all metal-ceramic construction and is designed to withstand severe shock and vibration. The center frequency of the tube is 2287.5 Mc and its weight is 20 ounces.