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1. (WO2017156449) IMPROVING POWER EFFICIENCY IN BEAMFORMING RF SYSTEMS

Pub. No.:    WO/2017/156449    International Application No.:    PCT/US2017/021891
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: H04B 17/13
H04B 7/06
Applicants: SEAKR ENGINEERING, INC.
Inventors: BUEHLER, Erik
Title: IMPROVING POWER EFFICIENCY IN BEAMFORMING RF SYSTEMS
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.