X-band coupled cavity slow wave structure of the traveling wave tube for airborne application

The paper describes the design of the conduction cooling X-band coupled cavity traveling wave tube (CC-TWT) based on the Hughes staggered slots slow wave structure (SWS) which was the first tube of this type made in the Wroclaw Division of PIT. A project of LO-700W traveling wave tube required solving various structural and technological problems e.g. effective termination based on loss ceramic buttons at the severs of RF circuits to minimize reflections and to provide proper attenuation. In this paper an approximate method for calculation of the input antenna of coaxial-line, waveguide transition and output waveguide window is also presented.