Patent ID: 6356023
Filing Date: 2002-03-12
Classification: H01J,H03F

Abstract:
A helical traveling wave tube for amplifying an RF signal, comprising:a traveling wave tube, having a cathode, an anode and a collector, operably connected to induce a beam of electrons to flow between the anode and the cathode, and wherein the collector receives the beam of electrons; a helical conductor section between the cathode and the collector, said helical conductor section having an RF input, an input section, a middle section, an output section, and an RF output, and wherein the input section has an adverse space harmonics taper (ASHT), wherein a pitch and radius of the input section vary linearly in the direction of propagation of the helical conductor; a housing containing the traveling tube and the helical conductor section; at least one dielectric supporting rod between the helical conductor and the housing, said at least one rod along at least a portion of the length of the helical conductor; and a sever, comprising a conductive surface on said at least one dielectric rod, such that the attenuation of an RF signal ranges from about 1 db to about 30 db.