Modeling of electrodynamical characteristics of coupled-cavities non-regular delay line sections

Under discrete description of the interaction of electron beam with HF-field of coupled-cavities non-regular delay line sections the accuracy of calculation of output characteristics of sectional TWT essentially depends on the exactness of modeling of “cold” frequency dependencies of matrix coefficients B_ij(ω) of the equation of excitation U_i=B_ijI_j where U_i, I_j are voltages and currents having been induced in HF gaps of section matrix B_ij that simulates electrodynamic properties of non-regular section determined by cascade connection of multiports of regular subsections, matching cavities and terminating loads