Large aperture rectenna based on planar lens structures
First Claim
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1. A method of generating electrical power for use aboard an aircraft or a satellite, the method comprising:
- a. deploying a sheet of dielectric material in an orientation, the sheet of dielectric material being associated with, coupled to and/or forming a part of said aircraft or satellite, the sheet of dielectric material having a plurality of metallic lenslets disposed on the sheet of dielectric material and a plurality of diodes disposed on or adjacent the sheet of dielectric material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets, the diodes being coupled together for supplying electrical power for use by systems aboard said aircraft or satellite, andb. directing the orientation of the sheet of dielectric material to receive incident radiation from a source of electromagnetic radiation.
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Abstract
A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets.
234 Citations
13 Claims
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1. A method of generating electrical power for use aboard an aircraft or a satellite, the method comprising:
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a. deploying a sheet of dielectric material in an orientation, the sheet of dielectric material being associated with, coupled to and/or forming a part of said aircraft or satellite, the sheet of dielectric material having a plurality of metallic lenslets disposed on the sheet of dielectric material and a plurality of diodes disposed on or adjacent the sheet of dielectric material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets, the diodes being coupled together for supplying electrical power for use by systems aboard said aircraft or satellite, and b. directing the orientation of the sheet of dielectric material to receive incident radiation from a source of electromagnetic radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of designing an electromagnetic energy receiving surface having a dielectric film with conductive patches formed thereon and arranged as a lens, the receiving surface being responsive to an incoming electromagnetic field, the method comprising:
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(1) assume that the dielectric film is preferably planar and is patterned with the conductive patches disposed in a geometric arrangement; (2) treat the conductive patches as resonators having a resonance frequency; (3) characterize the metal patches in terms of scattered field (magnitude and phase) for various frequencies with respect to the resonance frequency; (4) select a shape and a position of the conductive patches such that fields from all of the metal patches add up in phase at a focal point or focus of the lens; (5) build a scattering matrix that describes the field at a chosen point on the lens as a function of the incoming electromagnetic field, the scattering matrix including interaction among the conductive patches forming the lens; and (6) optimize the resonance frequencies of the conductive patches so that the field at the focal point or focus of the lens is a maximum.
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Specification