Analysis of vane-loaded three-beam folded waveguide slow-wave structure for 220GHz TWT

Two vane-loaded three-beam folded waveguide structures, the symmetrical vane-loaded structure and the staggered vane-loaded structure, are proposed in this paper. Simulation results show that, for 220GHz traveling wave tube (TWT), the stagger vane-loaded structure has better cold characteristics and beam-wave interaction characteristics than those of the symmetrical vane-loaded structure.