TRAVELING-WAVE TUBE Russian patent published in 2008 - IPC H01J23/26 H01J25/34 

FIELD: microwave electronics; helical traveling-wave tubes, their development and manufacture.

SUBSTANCE: proposed traveling-wave tube has power supply and helical slow-wave line secured within current-conductive enclosure by means of insulating rods. The latter are made of pyrolytic rhombohedral boron nitride having highly oriented heterophase or monophase polycrystalline structure obtained by gas-phase deposition onto flat surface. Insulating rods are made and installed in traveling-wave tube so that planes of pyrolytic rhombohedral boron nitride deposition and longitudinal planes of insulating rods radially disposed relative to slow-wave line axis are parallel, parallelism tolerance field being not to exceed 0.5C, where C is cross-sectional area of insulating rods in direction perpendicular to radius of slow-wave line. Insulating rods can be made of pyrolytic rhombohedral boron nitride containing 0 to 85% of hexagonal phase or pyrolytic rhombohedral boron nitride incorporating 0 to 50% of wurtzite phase, total content of wurtzite and hexagonal phases being 0 to 85%.

EFFECT: augmented heat-transfer from helical slow-wave line, reduced temperature, enhanced reliability, efficiency, and output power of helical traveling-wave tube.

4 cl, 2 dwg