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: A magnetron includes a cylindrically shaped cathode having an electron emitting surface and a filamentary heater adapted to raise the temperature of the emitting surface sufficient to permit thermionic electron emission therefrom. The filamentary heater comprises a first filament support member having an axial shaft coaxially disposed within the support sleeve and is coupled at an end thereof to a portion of the support sleeve. The first filament support member has a plurality of first tines extending from an opposite end of the axial shaft. A second filament support member has an axial shaft coaxially disposed within the support sleeve along a common axis with the axial shaft of the first filament support member. The second filament support member has a plurality of second tines extending from an end of the axial shaft in substantial alignment with the first tines.