| 摘要 |
A magnetron comprising an anode portion, a cathode portion provided in a center of the anode portion, a cylindrical interaction space formed of the anode portion and the cathode portion , and iron magnetic pole pieces located at both ends of the interaction space in an tube axis direction thereof. A relationship between a thickness Tg (mm) of a tapered portion of the magnetic pole pieces and a magnetic flux Bg (mT, at 25 DEG C) of a center of the interaction space is set to satisfy 155 < Bg/Tg < 165. It is possible to obtain a magnetron with substantially constant oscillating efficiencies, and it is accordingly possible to stabilize outputs of the microwave oven and to enable easy control of heating food. <IMAGE> |
