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OwnerJames C. Administrator of the National Aeronautics and Space Administration with respect to an invention of Fletcher, Richard M. Dickinsoninventors
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A structure of a circularly polarized, thin conformal, antenna array which may be mounted integrally with the skin of an aircraft employs microstrip elliptical elements and interconnecting feed lines spaced from a circuit ground plane by a thin dielectric layer. The feed lines are impedance matched to the elliptical antenna elements by selecting a proper feedpoint inside the periphery of the elliptical antenna elements. Diodes connected between the feed lines and the ground plane rectify the microwave power, and microstrip filters (low pass) connected in series with the feed lines provide DC current to a microstrip bus. Low impedance matching strips are included between the elliptical elements and the rectifying and filtering elements.
An antenna array for microwave power conversion comprising a metal sheet cladding a layer of dielectric material, said layer of dielectric material being disposed over a metal backing sheet, and a plurality of circularly polarized antenna elements fabricated on said metal cladding sheet by etching said metal cladding sheet in a pattern which includes conductive strips connecting said antenna elements to a common load terminal and between said antenna elements and said load terminal, at least one microstrip low-pass filter connected to low impedance matching stubs and lodging a rectifying diode in said dielectric material with one terminal connected between said filter and matching stubs, and the other terminal connected to said metal backing sheet.
An antenna array for microwave power conversion comprising a plurality of circularly polarized antenna elements fabricated on a metal front sheet cladding a layer of dielectric material over a metal backing sheet by etching said metal front sheet in a pattern which includes conductive strips connecting the said antenna elements to a common load terminal, each antenna element having at least one microstrip low-pass filter connected to low impedance matching stubs, and at least one rectifying diode lodged in said dielectric material with one terminal connected to said conductive strip between said filter and low impedance matching stubs, and the other terminal connected to said metal backing sheet, each conductive strip feeding from an antenna element into a filter being inset within the periphery of the antenna element to a point of proper impedance to match the input impedance of the filter.
Dependencies are inferred from the claim text.