BROADBAND HIGH EFFICIENCY AMPLIFIER SYSTEM AND A METHOD OF CONSTRUCTING HIGH POWER AMPLITUDE MODULATED RF SIGNAL

摘要

A broadband high efficiency (RF) radio frequency amplifier architecture is disclosed. Systems and methods are provided for generating an amplified radio frequency (RF) signal representing a baseband input signal. First, second, and third signal paths are configured to amplify first, second, and third intermediate signals to provide respective amplified signals. A signal combiner assembly is configured to combine the amplified signals to produce the compound amplified RF signal. The signals are combined such that a first amplified signal modulates a load impedance at respective outputs of an active device associated with the plurality of amplifiers in the second signal path, and one of the first amplified signal, the second amplified signal, and a sum of the first and second amplified signals modulates a load impedance of an active device associated with the plurality of amplifiers in the third signal path.

主权项

1. A system for providing a compound amplified radio frequency (RF) signal representing a baseband input signal, the system comprising:
a first signal path, configured to amplify a first intermediate signal to provide a first amplified signal; a second signal path comprising a plurality of amplifiers configured to amplify a second intermediate signal to provide a second amplified signal; a third signal path, comprising a plurality of amplifiers, configured to amplify the third intermediate signal to provide a third amplified signal; and a signal combiner assembly configured to combine the first amplified signal, the second amplified signal, and the third amplified signal to produce the compound amplified RF signal, such that the first amplified signal modulates a load impedance at respective outputs of at least one of a plurality of active devices associated with the plurality of amplifiers in the second signal path and one of the first amplified signal, the second amplified signal, and a sum of the first amplified signal and the second amplified signal modulates a load impedance of at least one of a plurality of active devices associated with the plurality of amplifiers in the third signal path.