The Aerospace Corporation

James P McKay

David A Ksienski

Walter L Bloss

Eric K Hall, Ii

Samuel S Osofsky

Gan-Tai Tseng

Keven S MacGowan

Gwendolyn M Shaw

A phased array antenna system with intermodulation beam nulling device includes nulling phase shifters.

Phased array antenna system with intermodulation beam nulling

An antenna system includes a heptagonal antenna array having one center antenna element and seven circumferentially surrounding antenna elements offering improved near and far sidelobe rejection, which is well suited for mechanically-gimbaled and time delayed electrical steering antenna applications.

Heptagonal antenna array

Heptagonal antenna array system

A transmission line junction for a coaxial conductor line has mating ends of interfitting cores, sleeves, and dielectrics for communicating broadband signals through the junction that blocks DC currents and voltages, the junction maintaining a quarter wavelength junction length for high frequency coupling while providing improved low frequency coupling across the junction.

Compact broadband non-contacting transmission line junction having inter-fitted elements

A receiving system includes a combiner configured to receive signals from two or more antenna elements and to generate sum and difference outputs, and a switch configured to sequentially provide the sum and difference outputs as inputs to a receiver.

Switched combiner GPS receiver system

A method for reducing intermodulation beams includes applying a beam-smearing phase distribution in addition to a beam-steering distribution for scanning to an array of antenna elements such that multiple higher-order intermodulation products are simultaneously reduced.

Higher-order intermodulation reduction using phase and angle smearing

A phased array antenna system divides the array into a plurality of subarrays that are driven by fine phase shifters with each subarray having a plurality of antenna elements driven by respective coarse phase shifters that are preferably MEMS coarse phase shifters having low weight and low cost and are infrequently used for improved reliability for selecting a coarse beam coverage area while the fine phase shifters are used to scan a high-gain antenna pattern within the selected coarse beam coverage area. Two-bit MEMS phase shifters are used to scan the beams from subarrays to various coverage areas within the required antenna field of view, thereby providing coarse beam steering for an array.

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Hermosa Beach, CA, United States of America

James P McKay