To calculation of TWT output characteristics outside the transparent band of coupled-cavities delay line sections

There are basically two factors that influence significantly the accordance between the computed results and the experimental data: strictness of the solution of the self-consistent problem of interaction of an electron beam with the high frequency field of the sections and accuracy of modeling the “cold” electrodynamical characteristics of the sections including terminal loads, where values can be determined by the known frequency dependences of the VSWR of the sections