Abstract: A silicon carbide filter includes a filter body and has a cavity formed therein. A microwave RF energy source is coupled to the cavity. A lossy media is disposed in the cavity for absorbing microwave energy. A reflective screen is spaced a predetermined distance from the input screen to define an input lossy volume and to define an output lossy volume between the reflective screen and the output screen. The input lossy volume includes a central less lossy section and an outer more lossy section, wherein in the outlet lossy volume the lossy media is less lossy than in the input lossy volume.

Abstract: The present invention provides a double helix coupled vane forward wave crossed-field amplifier utilizing backwall cooling and vane channel cooling in the RF slow wave circuit. Backwall channel cooling is provided for the majority of the anode vanes. Additional cooling is provided exclusively for the output vanes via individual coolant carrying passages in each output vane. The coolant carrying passages are machined into each standard double helix coupled output vane to create a vane channel in the shape of a "U". A tube formed in a corresponding U-shape is inserted and brazed to the machined vane. The vane assembly is then attached to the anode body of which the backwall has holes formed to accept the tubes from each vane. Divided backwall coolant channels are brazed to the outside of the anode, thereby placing in fluid communication the coolant channels to the tubes.

Abstract: A non-concentric matrix support for a crossed-field device is provided. The crossed-field device comprises a cathode, a plurality of anode vanes radially disposed around the cathode, and an interaction region defined between the cathode and innermost tips of the anode vanes. The cathode matrix support is concentrically coupled to the cathode, and has an axis of symmetry parallel to an associated axis of symmetry of the anode vanes, and offset from the axis of symmetry of the anode vanes by a predetermined amount. The non-concentric matrix support further comprises an end-hat disposed at both axial ends thereof with each respective one of the end-hats being uniformly spaced from the anode vanes. In an embodiment, the offset is approximately 0.008 inches.

Abstract: A crossed-field amplifier (CFA) includes a cylindrical cathode having an emitting surface coaxially disposed within an annular anode structure. The cathode has at least one circumferential groove disposed in the emitting surface. The grooves are relatively deep in comparison with their width. The grooves provide a phase smoothing of the rotating electron cloud spokes operative during crossed-field interaction. CFA noise is reduced by removal of the out-of-phase electrons. Due to their deeply cycloiding paths, these out-of-phase electrons become trapped in the grooves within a region generally shielded from the electric field of the CFA.