Helix traveling wave tubes with resonant loss
AssigneeVarian Associates, Inc.
InventorsErling L. Lien, Allan W. Scott
Life of this patent
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Abstract
To suppress spurious oscillations in a helix-type traveling wave tube (TWT), frequency-sensitive loading is produced by a lossy resonant circuit attached to a dielectric support and coupled to the fields of the interaction circuit. The lossy circuit is resonant near the band-edge frequency. It may be a section of delay line with reflective terminations. In one embodiment, it is a metallized pattern on a dielectric rod used to support the helix.
Claims18
In a traveling wave tube comprising a helix-type slow wave interaction circuit supported by dielectric support rod extending in the direction of propagation, frequency sensitive loss means for absorbing wave energy flowing on said interaction circuit within a certain range of frequencies, said loss means comprising resistive conductor means affixed to a dielectric support member and shaped to form a resonant slow-wave circuit extending in said direction of propagation with wave-reflective ends.
In a traveling-wave tube comprising a helix-type slow wave interaction circuit, a combined means for providing both dielectric support of said interaction circuit and frequency sensitive loss for absorbing and suppressing energy within a certain range of frequencies, comprising:
- a dielectric rod supporting said interaction circuit having affixed thereto a resistive conductor shaped to form a resonant slow wave circuit extending in the direction of propagation of said interaction circuit.
Dependencies are inferred from the claim text.