Ultra-wideband low-profile electronic support measure array
First Claim
1. A multi-element, ultra-wideband, circular array comprisinga graded dielectric lens structure comprising,one or more disk-shaped lenses comprising,decreasing thickness from the center of the one or more disk-shaped lenses to an outward edge of the one or more disk-shaped lenses;
- andcorresponding tapered dielectric constants wherein lower frequencies radiate from the center of the one or more disk-shaped lenses and higher frequencies radiate from the outward edge of the one or more disk-shaped lenses; and
a plurality of circularly disposed elements;
a plurality of transmit/receive (T/R) modules comprising a power amplifier (PA), a switch, and a low-noise amplifier (LNA) paired to each of the plurality of circularly disposed elements; and
an RF transceiver to generate and receive signals,wherein the multi-element, ultra-wideband, circular array is configured to provide high efficiency and pattern stability over a frequency bandwidth that exceeds four octaves.
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Accused Products
Abstract
The system and method for using a wideband dielectric lens array to instantaneously and unambiguously determining azimuthal angle of arrival (AoA) of RF energy over a frequency bandwidth of greater than four octaves. By forming two omnidirectional modes with a constant and linear phase response versus azimuth respectively, the AoA of the incident RF signal can be determined unambiguously using a one or two channel receiver architecture that is capable of measuring the phase between the two modal outputs.
9 Citations
20 Claims
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1. A multi-element, ultra-wideband, circular array comprising
a graded dielectric lens structure comprising, one or more disk-shaped lenses comprising, decreasing thickness from the center of the one or more disk-shaped lenses to an outward edge of the one or more disk-shaped lenses; - and
corresponding tapered dielectric constants wherein lower frequencies radiate from the center of the one or more disk-shaped lenses and higher frequencies radiate from the outward edge of the one or more disk-shaped lenses; and a plurality of circularly disposed elements; a plurality of transmit/receive (T/R) modules comprising a power amplifier (PA), a switch, and a low-noise amplifier (LNA) paired to each of the plurality of circularly disposed elements; and an RF transceiver to generate and receive signals, wherein the multi-element, ultra-wideband, circular array is configured to provide high efficiency and pattern stability over a frequency bandwidth that exceeds four octaves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of determining angle of arrival comprising
providing a graded dielectric lens structure comprising, one or more disk-shaped lenses comprising, decreasing thickness from the center of the one or more disk-shaped lenses to an outward edge of the one or more disk-shaped lenses; - and
corresponding tapered dielectric constants wherein lower frequencies radiate from the center of the one or more disk-shaped lenses and higher frequencies radiate from the outward edge of the one or more disk-shaped lenses; and providing a plurality of circularly disposed elements; providing a plurality of transmit/receive (T/R) modules comprising a power amplifier (PA), a switch, and a low-noise amplifier (LNA) paired to each of the plurality of circularly disposed elements; and generating omnidirectional signals using an RF transceiver; generating a first omnidirectional mode that possesses a constant phase vs. azimuth angle; generating a second omnidirectional mode that possesses a linear phase vs. azimuth angle; measuring an angle of a vector ratio of the first and second modes; and determining an unambiguous azimuth angle of arrival over a frequency bandwidth that exceeds four octaves. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification