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US 5,400,043 AGranted
Absorptive/transmissive radome
AssigneeMartin Marietta Corporation
InventorsWalter S. Arceneaux, Rickey D. Akins, Walter B. May
Life of this patent
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Abstract
An absorptive/transmissive structure is disclosed which can be used to fabricate antenna radomes to thereby reduce the electromagnetic signature of the radome and antenna without disrupting the electromagnetic waves generated by the antenna. An artificial dielectric material is placed on a frequency selective surface to absorb the energy of electromagnetic waves at a particular frequency or range of frequencies.
Claims10
An antenna radome for use with an antenna which emits electromagnetic waves at an operating frequency comprising:
- frequency selective means for allowing electromagnetic waves of said operating frequency to pass through the frequency selective means and for reflecting electromagnetic waves having other frequencies;
- and
- dielectric means, comprising an artificial dielectric which is low loss at said operating frequency, having metal fibers embedded therein and disposed above said frequency selective means relative to an interior of said radome, for absorbing electromagnetic waves having at least one predetermined frequency which impinge on the radome.
An absorptive/transmissive structure comprising:
- frequency selective means for allowing electromagnetic waves of a first frequency to pass therethrough and for reflecting electromagnetic waves having other frequencies;
- and
- dielectric means, comprising an artificial dielectric which is low loss at said operating frequency, having metal fibers embedded therein and disposed on said frequency selective layer, for absorbing electromagnetic waves at a second frequency which impinge on said structure.
Dependencies are inferred from the claim text.