Coaxial magnetron with improved starting

Details Coaxial magnetron with improved starting Coaxial magnetron with improved starting

1983-01-18

1984-10-30

Grimm, Siegfried H.

Oscillators

With magnetically controlled space discharge device

With undesired mode suppression or selection means

315 3951, 315 3967, H01J 2550, H03B 910

Patent

active

044802358

ABSTRACT:
The cathode of a coaxial magnetron has a cylindrical electron emitter with a radially extending projection which is asymmetrical with respect to the axis of the emitter. The projection suppresses starting of the magnetron in the TE.sub.121 mode and reduces starting jitter. In a preferred embodiment, the projection is in the form of a circumferential ridge extending around approximately one-half the circumference of the cylindrical surface and is centrally located thereon. The projection is oriented at 45 degrees with respect to the output of the magnetron. The power output of the magnetron is not substantially reduced.

REFERENCES:
patent: 3636403 (1972-01-01), Edwards et al.
patent: 4053850 (1977-10-01), Farney et al.
patent: 4194142 (1980-03-01), Gerard

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