Patent ID: 7402784
Filing Date: 2008-07-22
Classification: H05B

Abstract:
1. A microwave oven, comprising: a body having a cooking chamber therein, the cooking chamber having one opened side; a microwave source disposed at the body for supplying a microwave to the cooking chamber; a door coupled to the body for opening and closing the cooking chamber; and a multi-stage choke seal formed at the door, having different resonant frequencies at a frequency region higher than a central frequency of the microwave, and having different LC resonant circuits for preventing the microwave from being leaked between the body and the door, wherein the multi-stage choke seal comprises a first choke seal and a second choke seal spaced from each other with a certain gap and cascaded to be in parallel with each other, and wherein the gap between the choke seals is 1/15 to ⅛ of a wavelength of the microwave.