Choke coil for a magnetron, and magnetron comprising such coil.

摘要

In a magnetron comprising a choke coil (14) which is connected between a cathode terminal (6) and a capacitor (7) and cooperates with the capacitor to form an LC filter circuit, the choke coil includes a series connection of first and second core type inductors (9,11) and an air-core inductor (12), the first and second core type inductors, having respectively bar-like high-frequency absorbing members (8,10) located within windings thereof, the air-core inductor not having a high-frequency absorbing member, the air-core inductor is connected to the cathode terminal, a gap having a width within 1mm to 6mm is present between the high-frequency absorbing members of the first and second core type inductors, and an insulating material is placed in the gap.