Traveling wave tubes having backward wave suppressor devices

Details Traveling wave tubes having backward wave suppressor devices Traveling wave tubes having backward wave suppressor devices

1981-03-25

1984-11-06

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 35, 315 393, 330 43, H01J 2534

Patent

active

044814445

ABSTRACT:
There is disclosed a traveling wave tube with a slow wave structure having means for frequency and directionally sensitive wave amplification. The slow wave structure includes a conductive helix coaxially mounted within a conductive tubular housing and a conductive support structure longitudinally disposed within the housing and extending transversely from the helix to the housing. In some embodiments, the support structure is combshaped and in one embodiment is a helical ridge wound in registration with and in the same sense as the helix. The pitch of the housing and a preselected parameter of the support structure are simultaneously varied along the length of the helix such that a wave at a given frequency band traveling along the slow wave structure in a first direction is preferentially amplified with respect to waves traveling in an opposite direction. In various embodiments discussed, the first direction is the direction of travel of the electron beam, thereby providing a traveling wave tube which operates as a forward wave amplifier in which backward waves are suppressed.

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