SYSTEM DEVISED TO PREVENT UNDESIRABLE OSCILLATIONS GENERATION WITHIN TRAVELLING WAVE TUBES BY DAMPENING UNDESIRED FREQUENCIES

摘要

System to prevent undesired oscillations generation within coupled cell (or coupled cavity) travelling wave tubes, in essence consisting of one or more lossy termination waveguide sections, transparent to the undesired oscillation frequencies and non transparent to working frequencies; such sections include a dielectric filling (9) and a dissipative termination element (8). Such waveguide sections may be distributed in radial, longitudinal or both directions within the periodic structure of the travelling wave tube. Such waveguide sections are open towards the axis of the electron beam.