The Aerospace Corporation

Keven S MacGowan

David A Ksienski

Samuel S Osofsky

Albert M Young

James P McKay

Gwendolyn M Shaw

Thomas T Tam

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 product reduction or cancellation amplifier received two input signals that are split in quadrature wherein the inphase outputs are summed and then amplified as an inphase signal, and the quadrature outputs are fixed-phase phase-shifted, then summed and then amplified as a quadrature signal. The inphase and quadrature signals are fed into an output hybrid for canceling intermodulation products, where the fixed-phase phase shift is +/&#x2212;60&#xb0; for reducing 3rd order, +/&#x2212;36&#xb0; for reducing 5th order, and +/&#x2212;25.71&#xb0; for reducing 7th order intermodulation products, for examples, for improved signal communications of the two signals over a common antenna or link.

Multiple signal intermodulation reduction system

The hybrid active combiner and circulators serves as a coupler and is a three port network that integrates a directional coupler topology with active devices placed in the coupling paths in order to synthesize a low-loss active combiner circuit or a circulator device with minimal insertion losses. The coupler can have multiple stage amplifiers with transconductance values set according the Pascal's triangle for improved performance, and can function as a low cost and low weight transceiver well suited for various communications systems.

Growing community of inventors

Rancho Palos Verdes, CA, United States of America

Keven S MacGowan