PIN-TYPE SECTIONALIZED SLOW-WAVE STRUCTURE OF TRAVELING-WAVE TUBE Russian patent published in 2006 - IPC H01J25/34 

FIELD: electronic engineering; sectionalized slow-wave structures built of two or more separate sections.

SUBSTANCE: each section of slow-wave structure is essentially set of pins 2 disposed within case 1 perpendicular to its axis and spaced apart through definite distance at angle 0°<α≤180° to one another. Mounted on each pin concentrically with respect to case is transit-time tube 3 in the form of hollow cylinder. Proposed mechanical design is characterized in that adjacent ends of sections mount disk-shaped isolating metal walls 4 with transit-time hole 5 for passing electron beam which are concentric to case, as well as microwave energy absorbers 6 in the form of hollow cylinder. Absorbers are joined through their butt-ends with opposite sides of isolating wall concentrically to transit-time hole by means of heat-conducting layer 7. Proposed design of this slow-wave structure ensures electrodynamic parameters required for microwave amplifiers and can be used in continuously running high-power traveling-wave tubes with continuous power output up to 2.5 kW. In the course of operation this structure affords high level of microwave energy attenuation at ends of adjacent sections (up to 18 dB) and low level of absorber microwave energy reflectivity (0.01 to 0.07) in frequency band up to 15%.

EFFECT: enhanced heat-dissipation ability, reduced mass and size.

3 cl, 1 dwg