Power efficiency in beamforming RF systems
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United States of America Patent
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Sep 8, 2020
Grant Date -
Sep 14, 2017
app pub date -
Mar 10, 2017
filing date -
Mar 11, 2016
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Abstract
A satellite communication system processes a plurality of input signals to generate beamformed signals, drives a plurality of nonlinear power amplifiers with the beamformed input signals to produce RF signals for transmission; and transmits the RF signals with a plurality of Tx antenna elements. Conversion to and from linear signals to and from nonlinear or digitized signals is performed. Temporal or spatial decorrelation of the beamformed signals is employed to reduce the impact of intermodulation products. In some cases the power amplifiers are nonlinear, and can be one-sided or two-sided and produce two or three distinct output levels.
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