Microwave oven magnetron having choking structure and leakage fl

Details Microwave oven magnetron having choking structure and leakage fl Microwave oven magnetron having choking structure and leakage fl

1990-10-30

1993-01-05

Dzierzynski, Paul M.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

315 3953, H01J 2550

Patent

active

051774038

ABSTRACT:
In a microwave oven magnetron, a first metal cylinder and a ring-like permanent magnet are provided on a magnetron body. Second and third metal cylinders are coaxially arranged in the first metal cylinder so that choking grooves for choking second and fourth harmonic waves are formed between the first and second metal cylinders and the second and third metal cylinders. A ferromagnetic cylinder made of iron or iron alloy is arranged around the first metal cylinder. Thus, a magnetic flux supplied from the permanent magnet into a space inside of the second metal cylinder have axial components which are greater than or equal to 400 gauss in over half the inner space.

REFERENCES:
patent: 3794879 (1974-02-01), Edwards
patent: 4006382 (1977-02-01), Butler et al.
patent: 4205250 (1980-05-01), Ohara
patent: 4207496 (1980-06-01), Nakai
patent: 4282459 (1981-08-01), Oguro
J. R. M. Vaughn, "Some High-Power Window Failures", Transactions of the IRE, Professional Group on Electron Devices, Jul. 1961, IEEE Inc., New York, pp. 302-308.
D. H. Priest, "Multipactor Motions in Microwave Tubes", Proceedings of the International Congress on Microwave Tubes, 1963, Scheveningen, 3-7 Sep. 1962, pp. 34-40.

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