The Aerospace Corporation

Gwendolyn M Shaw

David A Ksienski

Samuel S Osofsky

James P McKay

Keven S MacGowan

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

An intermodulation suppression method using phased array antenna electronics insignificantly degrades the desired primary main beams while substantially suppressing undesired intermodulation product beams, and particularly undesired third-ordered intermodulation product beams. The beam smearing method has two aspects, including phase smearing and angle smearing for respective subarrays to reduce the intermodulation-product beams of the phased array antenna beam patterns. With a 1 dB degradation of the primary main beams, a 6 dB to 10 dB suppression of the intermodulation product beams is achieved.

Phased array antenna intermodulation suppression beam smearing method

A grating lobe suppression method is applied to a phased array antenna system having antenna array elements that are grouped in regularly spaced subarrays each having a plurality of regularly spaced antenna elements within the subarrays for suppressing intermodulation grating lobes generated within a field of view of the antenna system when amplifying two modulated carrier communication signals at respective two different frequencies.

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Torrance, CA, United States of America

Gwendolyn M Shaw