Design of Triple-Gap Cavity Output Circuit for X Band Klystron

The triple-gap cavity technology is an important means to expand the bandwidth of the klystron output circuit. In order to realize 1 GHz output bandwidth for $X$ band klystron, the equivalent circuit simulation of the triple-gap cavity is carried out. The actual cavity size is determined by the designed electrical parameters and the cold test model is processed. Based on the microwave network analysis theory and perturbation theory, a test method for the gap impedance of the triple-gap cavity was designed, and the output circuit of the klystron with a bandwidth of 1 GHz (9150 MHz-10150 MHz) was tested, which laid an important technical foundation for the development of broadband klystrons.