Patent ID: 7592573

Claim:
A microwave cooker, comprising: a body having a cooking chamber therein, the cooking chamber having one opened side; a microwave source disposed at the body for supplying 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 and having different resonant frequencies and 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 cascaded to be in parallel with each other, wherein the first choke seal of the multi-stage choke seal has an LC resonant circuit comprising only an inductance (L) and a capacitance (C) connected to the inductance in series, and the second choke seal of the multi-stage choke seal has an LC resonant circuit comprising only an inductance (L) and a capacitance (C) connected to the inductance in parallel.