| 摘要 |
A magnetron for a microwave oven includes a yoke (20), an anode cylindrical body (30) installed inside the yoke (20), a plurality of vanes (40) mounted inside the anode cylindrical body (30), a filament (50) installed in a center of the vanes, and an upper magnet (60a) and a lower magnet (60b) respectively mounted on an upper side and a lower side of the anode cylindrical body (30). The magnetron also includes an upper pole piece (70a) and a lower pole piece (70b) respectively installed between the anode cylindrical body (30) and the upper and lower magnets (60a,60b). A length (L) from an external tip of a central part (74) of the upper pole piece (70a) to an internal tip thereof, on which a hollow part (73) is formed, is adjusted to suppress harmonics in the magnetron. Thus, generation of the harmonics may be effectively attenuated, and an output of a microwave may be enhanced by preventing power consumption of the magnetron which may be large due to interrupting harmonics.
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