Magnetron having a cathode with tapered end shields

Details Magnetron having a cathode with tapered end shields Magnetron having a cathode with tapered end shields

1992-09-16

1994-10-18

Lee, Benny T.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

315 3971, 315 3963, 315 3967, H01J 2305, H01J 2550

Patent

active

053571681

ABSTRACT:
This invention relates to a magnetron which is adapted to increase electrostatic capacitance between holes of magnetic pole pieces and end shields to improve oscillation efficiency. The magnetron comprises an anode cylinder, anode vanes attached to inner surface of the anode cylinder which defines a space upper and lower magnetic pole pieces mounted on the both ends of the anode cylinder each of which has hole, and a center bar disposed in the space which has upper and lower end shields at the both ends thereof and a coil filament thereon, wherein said holes of the magnetic pole pieces have outward tapered inner circumferential surfaces and said end shields have outward tapered outer circumferential surfaces corresponding to the tapered inner circumferential surfaces of the holes. It is possible to prevent the insulation located between the magnetic pole pieces and the end shields from being broken without reducing the spacings between the holes and the end shields. Without reducing the spacings, the inner circumferential surfaces of the holes and the outer circumferential surfaces of the end shields are broadened, thereby increasing Q value of resonator and oscillation efficiency.

REFERENCES:
patent: 3046444 (1962-07-01), Downing et al.
patent: 4187444 (1980-02-01), Gerard
patent: 4194142 (1980-03-01), Gerard
patent: 4280078 (1981-07-01), Tsutsui et al.

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