HIGH FREQUENCY HEATING APPARATUS

摘要

A high requency heating apparatus including a door assembly having a high frequency energy shielding member and a plurality of glass plate members disposed in front and on the outer side of the shielding member. The distances between the shielding member and plurality of glass plate members are such that a composite-impedance ZT made up of the impedance of the shielding member, the impedance of the glass plate members and the impedance of the space around the heating apparatus becomes approximately equal to or smaller than the composite impedance Zs made up of the impedance of the shielding member and the impedance of the external space in the absence of the glass plate member for reducing microwave leakage at the front portion of the door assembly.