The lower shield fixed structure of the cathode assembly of the magnetron

摘要

(57) [summary] [purpose] cathode assembly of the magnetron is as mate to accurately centered with respect to the central axis of the anode cylinder, To minimize the dark current amount caused by leakage of the heat electrons to increase the efficiency of the magnetron. [Constitute] a cathode assembly, the center lead to the center 1 5 is formed with a through hole 28b which penetrates, lower end having a flange 28a, to support the lower end shield 28, which improved the filament to support connection, the lower end shield 28 combines the flange 28a on the top surface, and the center in the heart and a first support hole 31a penetrating supporting the leads 15, the second support hole 31b of the side leads 17 extending through the support to the side parts Preparative to have constitute the lower pole 10 central opening 10a fixedly mounted to the insulator 31. a.