Patent ID: 8658953

Claim:
An antenna cover assembly for a high-temperature operating environment, comprising: a waveguide for installation within a cook cavity, the waveguide comprising an outer wall, an inner wall, and a plurality of slot antennae formed in the inner wall for permitting energy to be emitted through the inner wall into the cook cavity; at least one cover plate configured to cover one or more of the slot antenna, the at least one cover plate having an inner side and an outer side and a plate edge, and being translucent to at least one selected frequency of electromagnetic energy; one unitary gasket per cover plate, each unitary gasket comprising at least two elastomeric gasket portions, wherein one of the gasket portions is configured for sealingly engaging the plate edge against the inner side to provide an inner sealing interface, and wherein another gasket portion is configured for sealingly engaging the plate edge against the outer side to provide an outer sealing interface, wherein the gasket provides a clearance distance of about 0.375 inches or less between the cover plate and the inner wall of the waveguide; a plurality of retainer plates adapted for attachment to a structure located in a high-temperature operating environment, each retainer plate having a sealing flange adapted for clamping one of the cover plates generally adjacent an antenna portion of a waveguide.