Microwave browning plate
AssigneeRaytheon Company
InventorsGeorge H. MacMaster, Kenneth W. Dudley
Life of this patent
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Abstract
A microwave browning plate utilizing members of a relatively low dielectric constant material is provided having a conductive coating on three sides with a load supported on the uncoated side. The induced currents in the conductive material provides for current induced in the dielectric material. An exponentially decreasing fringing electric field is provided as a standing wave adjacent to the uncoated side. A low dielectric constant material may be utilized with the conductive coating and an overall height of one-quarter of a wavelength will result in a thinner microwave plate. Means are provided for restricting the current flow to a desired mode.
Claims2
A utensil for heating with microwave energy at a predetermined frequency comprising:
- a plurality of members of a low dielectric constant material having four parallel sides;
- siad dielectric members having a height of approximately one-quarter of a guided wavelength of energy at said frequency propagated within the dielectric members;
- a coating of a conductive material on three sides of said members;
- means for supporting said members in a parallel array with intervening spaces and the uncoated sides exposed to receive a load to be heated;
- and
- said uncoated sides providing a fringing electric field in close proximity to the load when microwave energy is applied.
Dependencies are inferred from the claim text.