Tunable magnetron

Details Tunable magnetron Tunable magnetron

1985-11-19

1987-11-10

Moore, David K.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

315 3971, H01J 2550

Patent

active

047059907

ABSTRACT:
The invention relates to a tunable magnetron having coaxial cathode and anode systems (13 and 11, 12) which define therebetween an annular, evacuated interaction space (18) and a rotatable tuning body (20, 24) supported by two ball bearings (21, 22). The tuning body (20, 24) with its bearings (21, 22) is situated in an evacuated space (25) communicating with the interaction space (18). A magnetic circuit having two pole shoes (16, 17), situated one on each side of the interaction space for producing an axial magnetic field through the interaction space (18), is closed through the rolling bearing (21) situated closest to the interaction space. In order to prevent magnetic interaction forces between the rolling bodies from influencing the rotation in the case of continuous operation, in particular if the bearings have no retainer ring, at least the rolling bodies in the bearing (21) situated closest to the interaction space (18) are made of non-magnetic material, e.g. non-magnetic hard metal or ceramic material.

REFERENCES:
patent: 3343031 (1967-09-01), Backmark
patent: 3711171 (1973-01-01), Orkin et al.
patent: 3720853 (1973-03-01), Atlee et al.
patent: 4143300 (1979-03-01), Cutting et al.

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