Velocity tapering of comb-quad traveling-wave tubes

Details Velocity tapering of comb-quad traveling-wave tubes Velocity tapering of comb-quad traveling-wave tubes

H - Electricity

01

J

353/11

H01J 25/34 (2006.01) H01J 23/24 (2006.01)

Patent

CA 1220862

ABSTRACT Velocity Tapering of Comb-Quad Traveling-Wave Tubes The "comb-quad" slow-wave interaction circuit for a traveling-wave tube consists of a pair of metallic ladders whose rungs cross, the rungs of one ladder passing through the spaces between the rungs of the other ladder. The phase velocity of the circuit wave is tapered to a lower value at the output end by gradually enlarging the axial open spaces between the longitudinal bases of the ladders and the sur- rounding envelope. The periodic elements of the ladders are all exactly alike, simplifying the con- struction. The slowing of the wave velocity is greater at the lower-frequency end of the passband, providing improved efficiency over the operating band.

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