Patent ID: 8670732
Filing Date: 2014-03-11
Classification: H03F,H04L

Abstract:
1. A system for modulating a radio frequency (RF) carrier signal with a baseband signal and amplifying the modulated RF carrier signal to provide an amplified RF signal, the system comprising: a quadrature combiner configured to provide an output signal at an associated output port; a first main amplifier configured to receive a first modulated RF signal and provide a first output to a through port of the quadrature combiner; a second main amplifier configured to receive the first modulated RF signal and provide a second output to a coupled port of the quadrature combiner; an auxiliary amplifier configured to receive a second modulated RF signal and provide a third output to an isolation port of the quadrature combiner; and an RF modulator configured to provide the first modulated RF signal and the second modulated RF signal, the RF modulator comprising a phase shifter that can be used to continuously adjust the phase of the second modulated RF signal relative to the first modulated RF signal.