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US 2008/0174509 A1Published application
Subwavelength Aperture Monopulse Conformal Antenna
AssigneeLockheed Martin Corporation
InventorBrett A. Williams
Life of this patent
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Abstract
In various aspects and embodiments, incident electromagnetic radiation is received through a subwavelength aperture in a lens, the subwavelength aperture being defined by a substrate encased in a dielectric medium.
Claims61
A subwavelength electromagnetic wave receiver comprising:
- a lens, including:
- a dielectric medium;
- a substrate encased in the dielectric medium and defining an subwavelength aperture;
- and
- a detector receiving energy transmitted through the lens.
2 more elements
An apparatus comprising:
- a radome;
- an evanescent wave-coupled lensing system in the radome, including an opposed pair of forward-looking lenses, each lens comprising:
- a dielectric solid;
- and
- a grating defining a subwavelength aperture, the grating being encased by the dielectric solid;
- and
- a detector capable of receiving energy transmitted through the lensing system.
4 more elements
A radio frequency antenna, comprising:
- a lensing system including a subwavelength aperture;
- means for defining the geometry of the lensing system and in which the lensing system is disposed;
- and
- a radio frequency detector capable of being evanescent-wave coupled to the lensing system and detecting a radio frequency signal received through the lensing system.
1 more element
An apparatus, comprising:
- a metal substrate defining a subwavelength aperture therein;
- and
- a dielectric solid encasing the metal substrate.
A method, comprising:
- receiving energy through a pair of opposing subwavelength apertures;
- and
- determining a target angle from the steep change of amplitude versus angle presented by the aperture's beamwidth.
A lens, comprising:
- a substrate defining a subwavelength aperture therethrough and a periodic surface feature thereon;
- and
- a dielectric medium encasing the substrate.
An apparatus comprising:
- a sleek missile radome;
- a lensing system in the missile radome, including an opposed pair of forward-looking lenses, each lens comprising:
- a dielectric solid;
- and
- a grating defining a subwavelength aperture, the grating being encased by the dielectric solid, the dielectric solid filling the aperture;
- and
- a detector capable of receiving energy transmitted through the lensing system.
4 more elements
A method, comprising:
- receiving an optical frequency signal through a foreshortened lens to which a non-reflective coating has been applied;
- and
- determining target angle from the received optical frequency signal.
A method, comprising:
- receiving a returned radio frequency signal through a subwavelength aperture defined in a metal substrate underlying a least a portion of a dielectric medium;
- and
- detecting the received signal.
An apparatus comprising:
- an opposing pair of antennas, separated by a predetermined distance, each antenna including:
- a dielectric medium;
- a metal substrate defining subwavelength aperture, the grating being encased by the dielectric medium, the dielectric medium filling the aperture;
- and
- a detector capable of receiving energy transmitted through the aperture.
2 more elements
A missile, comprising:
- a sleek radome;
- a lensing system, including a pair of lenses, each lens comprising:
- a dielectric medium;
- and
- a substrate encased in the dielectric medium and defining a subwavelength aperture therethrough and a periodic surface feature thereon;
- a pair of detectors, each detector capable of receiving energy transmitted through the lens;
- a flight control mechanism;
- and
- a controller capable of non-coherent Fresnel direction finding a target from the received energy and transmitting a flight correction signal to the flight control mechanism responsive thereto.
6 more elements
Dependencies are inferred from the claim text.