Wideband multi-cavity velocity modulation tube

Details Wideband multi-cavity velocity modulation tube Wideband multi-cavity velocity modulation tube

1976-03-23

1977-04-19

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 539, 315 552, H01J 2510

Patent

active

040190897

ABSTRACT:
A multi-cavity type velocity modulation tube, operable in the K-band above 10 GHz and having input, pre-buncher, buncher and output cavities which are respectively tuned to frequencies that are higher than the upper end of the operating pass band; near the upper end of the operating pass band and lower than the resonant frequency of the input cavity; higher than the resonant frequency of the input cavity; and within the operating pass band of the tube. The input cavity Q-value is lower than that of the prebuncher cavities.
Preferably first and second prebuncher and first and second buncher cavities are provided, the second prebuncher and at least one of the bunchers are unloaded and the second prebuncher is tuned to a frequency in the vicinity of the lower end of the operating pass band.
The design yields a low cost tube having a significantly improved gain-bandwidth product.

REFERENCES:
patent: 3195007 (1965-07-01), Watson et al.
patent: 3622834 (1971-11-01), Lien
patent: 3725721 (1973-04-01), Levin
patent: 3775635 (1973-11-01), Faillon et al.
patent: 3819977 (1974-06-01), Kageyama
patent: 3974417 (1976-08-01), Kageyama et al.

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