Frequency-selective loss technique for oscillation prevention in

Details Frequency-selective loss technique for oscillation prevention in Frequency-selective loss technique for oscillation prevention in

1976-10-04

1978-08-15

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 36, 315393, H01J 2534

Patent

active

041075757

ABSTRACT:
Backward-wave oscillations in a helix or helix-derived traveling-wave tube re prevented by dimensioning the conductive shell surrounding the helix so that the backward-wave space harmonic of the slow-wave interaction circuit has a cutoff frequency in the vicinity of the frequency of the potential backward-wave oscillations. Lossy material is disposed between the shell and helix so that there is strong coupling between the electromagnetic field and the lossy material near the cutoff frequency of the backward-wave space harmonic.

REFERENCES:
patent: 3200286 (1965-08-01), Rorden
patent: 3278792 (1966-10-01), Blattner
patent: 3389291 (1968-06-01), Ruetz
patent: 3397339 (1968-08-01), Beaver et al.
patent: 3670197 (1972-06-01), Unger
patent: 3903449 (1975-09-01), Scott et al.
patent: 4005329 (1977-01-01), Manoly

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