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

1983-06-09

1985-12-10

Massie, Jerome

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 36, H01J 2534

Patent

active

045582564

ABSTRACT:
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 rung 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 surrounding envelope. The periodic elements of the ladders are all exactly alike, simplifying the construction.
The slowing of the wave velocity is greater at the lower-frequency end of the passband, providing improved efficiency over the operating band.

REFERENCES:
patent: 4237402 (1980-12-01), Karp
patent: 4315194 (1982-02-01), Conolly
patent: 4481444 (1984-11-01), Phillips

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