Radar absorbing coatings
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorHarry W. Carpenter
Life of this patent
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Abstract
A method for preventing the discovery of military aircraft and missiles by enemy and infrared detectors. The method involves applying a coating of a ferrite containing glass composition to the surfaces of those metal or ceramic substrates that are susceptible to detection through their radar or infrared signature.
Claims3
A method for minimizing the reflection of microwave radiations from surfaces which normally reflect such radiations comprising the steps of applying to said surfaces a thin coating material composed of a composite mixture of about 50 to 96 weight percent of a radar absorbing spinel ferrite selected from the group consisting of nickel-zinc-ferrite and lithium-zinc-ferrite with the balance of said coating material substantially all glass frit bonding agent and then firing said coating material at a temperature of about 1950° F. for a period of about 5 minutes to form a radar reflecting surface.
In combination with a normally radar reflecting surface, a thin layer bonded to said surface for minimizing the reflections of radar signals that normally impinge upon said surface, said layer composed of a composite mixture of about 50 to 96 weight percent of a radar absorbing spinel ferrite selected from the group consisting of nickel-zinc-ferrite and lithium-zinc-ferrite with the balance of said composite mixture being a glass frit bonding agent.
Dependencies are inferred from the claim text.