A 500-KW CW klystron at S-band

A tuneable klystron amplifier which produces about 500 kw of CW power over the frequency range of 2.320 to 2.455 GHz has been developed. The tube uses a solid beam of microperveance 1.0. It has five single-gap cavities and produces 56 dB of gain with a 1 dB bandwidth of 20 MHz at 55% conversion efficiency. A carefully designed confined flow electron beam allows use of a single-coil solenoid and a fixed magnetic field for all frequencies within the band at all power levels between 100 and 500 kw. A modulating anode is provided for beam switching control. The collector easily dissipates the full dc beam power of one megawatt.