Self-biasing collector elements for linear-beam microwave tubes

Details Self-biasing collector elements for linear-beam microwave tubes Self-biasing collector elements for linear-beam microwave tubes

1997-07-24

2000-05-09

Lee, Benny T.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

H01J 2302

Patent

active

060608323

ABSTRACT:
A self-biasing element is formed by coupling an electron accumulator to a collector stage of a linear-beam microwave tube with a base which has a selected resistance. The electron accumulator has a secondary emission coefficient less than one and is positioned to intercept a portion of the electrons in the electron beam of the linear-beam microwave tube. The electron accumulator thus acquires a negative voltage whose magnitude is controlled by selecting the base resistance and the radial and axial position of the self-biasing element within the collector. Various arrangements of self-biasing elements and collector stages are disclosed which improve the efficiency and RF performance of the microwave tube.

REFERENCES:
patent: 2568325 (1951-09-01), Diamond
patent: 3381162 (1968-04-01), Schwartz et al.
patent: 3448324 (1969-06-01), Eggers et al.
patent: 4250430 (1981-02-01), Heynisch
patent: 4607193 (1986-08-01), Curren et al.
NASA Tech. Briefs, Document No. XP002084136 Graphite Multistage Depressed Collector for Microwave Tubes: No. 164, Mar. 1988, Springfiled VA, USA *p. 1, left hand column.
Pierce, J.R., Theory and Design of Electron Beams, D. Van Nostrand and Company, New York, 1954, pp. 72-75.
Hansen, James, W, et al., TWT/TWTA Handbook, Hughes Aircraft Company, 1993, Torrance, CA, pp. 58-59.

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