Abstract: The RF amplifier has a single waveguiding structure extending longitudinally in a direction of propagation of electromagnetic waves, in which density of an injected current flow is not RF modulated, and a transverse E-field component vector of the electromagnetic waves interacts with the electron flow by electron transit time effects. The waveguiding structure comprises a metallic top strip 1 and a metallic ground strip 2 held apart by two ceramic supports 3 which integrate the two strips into a vacuum tight enclosure together with two RF transparent dielectric windows 4 and 5 which represent the amplifier input and output respectively. Electron flow is generated in a linear current injection system by electronic emitters providing a cathodic source of electron flow which is injected into the waveguiding structure, with a flow vector orientation transverse to the direction of propagation of said electromagnetic waves.

Abstract: A traveling wave device, or the like, having an internal metallic helical core element which has a plurality of particulate deposition deposited dielectric segments to form an unific slow wave structure having an improved balance between the heat conductive and electrical requirements of said slow wave structure; and methods for forming said balanced slow wave structure.

Abstract: A traveling wave device having a slow wave structure formed from at least one casting in which at least a portion of the internal passages are formed during the casting process to provide a more rigid structure having improved dimensional retention through the elimination of a multiplicity of brazed joints at and between adjacent cavity walls.

Abstract: A traveling wave device having a metallic helical core element which is ceramic coated on its peripheral surfaces to provide a heat transferring dielectric and which is in intimate peripheral contact within the body of said device, to thus provide a simplified and long-life structure having improved heat conductivity permitting greater RF output and size-weight reduction of said device; and methods for forming and coating the helices.

Abstract: A crossed-field amplifier with a beam modulating grid for the electron gun has an auxiliary electrode which modifies the electrostatic field and thus the electron beam adjacent the entrance of the amplifier interaction space. Efficiency is improved and incidence of electrons striking the delay line is reduced.