Slow-wave filter for electron discharge device

Details Slow-wave filter for electron discharge device Slow-wave filter for electron discharge device

1970-05-01

1983-01-25

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

H01J 2534

Patent

active

043705960

ABSTRACT:
A filter for suppressing backward wave energy modes propagating along a slow-wave structure. The filter is frequency responsive and comprises a wall having coupling apertures and, in one embodiment, a series of waveguide sections which are joined to the coupling apertures and alternate sections are terminated in matched loads. The apertured wall encloses the slow-wave structure and the apertures are arranged relative to periodic elements of the slow-wave structure such that a forward wave can propagate with substantially no interaction with the filter while the energy in a backward wave is dissipated in the matched loads. The filter is particularly adapted for absorbing backward waves in a travelling wave tube operating at high power and an octave bandwidth.

REFERENCES:
patent: 2900557 (1959-08-01), Webber et al.
patent: 2939035 (1960-05-01), Reuerdin
patent: 3221205 (1965-11-01), Sensiper
patent: 3345528 (1967-10-01), Bryant, Jr.

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