Cathode for a magnetron having primary and secondary electron em

Details Cathode for a magnetron having primary and secondary electron em Cathode for a magnetron having primary and secondary electron em

1996-12-06

1999-12-21

Lee, Benny T.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

313103R, H01J 2305

Patent

active

06005347&

ABSTRACT:
An improved magnetron which is capable of elongating the life span of the magnetron, reducing the fabrication cost, and enhancing the performance of the system without using a filament in the conventional art, which includes a center lead, an upper end shield engaged to an upper portion of the center lead for preventing thermal electrons from being escaped, a plate-type primary cathode arranged below the upper end shield and fixed to one side of the supporting layer surrounding the center lead, a cylindrical secondary cathode having an elongating slit formed in an outer circumferential surface thereof, through which slit a part of the plate-type primary cathode is outwardly extended beyond the outer circumferential surface of the cylindrical secondary cathode, and a lower end shield engaged to the lower portion of the secondary cathode.

REFERENCES:
patent: 3503001 (1970-03-01), Farney
patent: 3596131 (1971-07-01), Wilczek
patent: 5280218 (1994-01-01), Smith

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