Subwavelength aperture monopulse conformal antenna
First Claim
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1. 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 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.
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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.
10 Citations
32 Claims
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1. A missile, comprising:
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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 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. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a radome in which a pair of opposed subwavelength apertures are positioned and angled away from each other; a lens that positions the subwavelength apertures in the radome and includes; a dielectric medium; and a substrate encased in the dielectric medium and defining at least one of the subwavelength apertures; a detector receiving energy transmitted through the subwavelength apertures and generating a signal representative of the patterns of the received energy; and a computing apparatus that, in operation, combines the patterns of the detected energy to find an angle to a point of reflection for the received energy using an amplitude comparison. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method, comprising:
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receiving reflected energy through a pair of opposed subwavelength apertures encased in a dielectric that are angled away from each other; separately detecting the energy received through each of the subwavelength apertures; generating a pair of signals representative of the patterns of the separately detected energy; and combining the patterns of the detected energy as represented in the signals to find an angle to a point of reflection for the received energy using an amplitude comparison, including non-coherent Fresnel direction finding. - View Dependent Claims (24, 25)
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26. An apparatus, comprising:
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means for receiving reflected energy through a pair of opposed subwavelength apertures that are angled away from each other, the means comprising; a radome in which the subwavelength apertures are positioned; a pair of lenses that position the subwavelength apertures in the radome, each lens including; a dielectric medium; and a substrate encased in the dielectric medium and defining a respective one of the subwavelength apertures; means for separately detecting the energy received through each of the subwavelength apertures; means for generating a pair of signals representative of the patterns of the separately detected energy; and means for combining the patterns of the detected energy as represented in the signals to find an angle to a point of reflection for the received energy using an amplitude comparison. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification