Linear electron beam tubes arrangements

Details Linear electron beam tubes arrangements Linear electron beam tubes arrangements

1995-11-07

1996-07-16

O'Shea, Sandra L.

Electric lamp and discharge devices

Discharging devices with apertured electrode interposed...

313308, 315 4, 315 5, 315 537, 330 44, 330 45, H01J 2520, H01P 706

Patent

active

055369928

ABSTRACT:
An inductive output tetrode includes a cylindrical ceramic envelope within which is located an electron gun including a cathode and grid. An annular resonant input cavity into which a high frequency signal is coupled surrounds the envelope and is located adjacent the electron gun so as to provide a modulating electric field in the cathode-grid region to density modulate the electron beam. The input cavity is connected to two metal cylinders arranged immediately adjacent to the outside of the envelope. Metallic portions located within the envelope are co-extensive with cylinders with the material of the envelope 1 being located between them. These structures act as r.f. chokes to reduce high frequency losses from the input cavity. Tuning of the resonant cavity may be achieved by adjusting a tuning member which is at distance of quarter of a wavelength at the resonant frequency from the cathode-grid region.

REFERENCES:
patent: 4527091 (1985-07-01), Preist
patent: 5239272 (1993-08-01), Bohlen et al.
patent: 5317233 (1994-05-01), Lien et al.

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