| 摘要 |
<p>A magnetron for microwave oven has an anode cylinder (1), vanes (2) (height: H (mm)), a cathode (5) spirally extending along the central axis, a pair of end hats (6, 7) (outer diameter: DEH1 (mm), DEH2 (mm)) fixed to both ends of the cathode (5), and a pair of pole pieces (8, 9). Vanes (2) extend from an inner surface of the anode cylinder (1) to the central axis. Free ends (31) of the vanes (2) form a vane inscribing circle (diameter: Da (mm)). Pole pieces (8, 9) expand like funnels from through-holes (inner diameter: DPP1 (mm), DPP2 (mm)) facing to the end hats (6, 7) and pinch the cathode (5). The shape of the magnetron satisfies, H‰¦8.5, H/Da‰¦0.95, DEH1/DPP1‰¦0.8, DEH1/DPP2‰¦08, DEH2/DPP1‰¦0.8, DEH2/DPP2‰¦0.8, 0.92‰¦Da/DPP1‰¦0.95, and 0.92‰¦Da/DPP2‰¦0.95.</p> |
