Georgia Tech Research Corporation

Fei Wang

Hua Wang

Huy Thong Nguyen

Song Hu

Shaojie Xu

An embodiment of the present disclosure relates to a method of controlling a power amplifier (PA). The PA can comprise a main PA path and an auxiliary PA path. The auxiliary PA path can have a plurality of turn-on settings. The method can comprise: determining a power back off gain and a lower bound gain for the PA; and performing an iterative auxiliary PA turn-on setting selection process. The selection process can comprise: determining an instantaneous power input to the PA; based on the instantaneous power input, choosing a turn-on setting in the plurality of turn-on settings of the auxiliary PA path that causes an instantaneous gain of the PA to be between the power back off gain and the lower bound gain; and applying the chosen turn-on setting to the auxiliary PA path.

Power amplifiers and methods of controlling same

The disclosed technology includes device, systems, techniques, and methods for amplifying a complex modulated signal with a broadband power amplifier. A broadband power amplifier may include an input network connected a long an input signal path, a driver stage, an interstage matching network stage, a power amplification stage, and a broadband matching output network. The broadband matching output network may include two coupled transmission lines and a compensation line connected between the two coupled transmission lines. Further, the broadband matching output network may include a capacitor connected with a secondary winding and a capacitor connected to each of the primary windings. The disclosed technology further includes transmission systems incorporating the broadband power amplifier.

Power amplifiers and transmission systems and methods of broadband and efficient operations

The disclosed technology includes device, systems, techniques, and methods for amplifying a complex modulated signal with a mixed-signal power amplifier. A mixed-signal power amplifier may include an input network for splitting an input signal to multiple signals with corresponding phase and amplitude offsets, a main power amplification path including at least an analog power amplifier for amplifying a first signal, one or more auxiliary power amplification paths including at least one digitally controlled analog power amplifier in each path for amplifying a second signal, and an output network for combining the two amplified signals. The main power amplification path and the auxiliary power amplification paths can operate together to achieve load modulation to enhance the overall power amplifier efficiency at power back-off mode and the overall power amplifier linearity. The disclosed technology further includes transmission systems incorporating the mixed-signal power amplifier.

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Atlanta, GA, United States of America

Fei Wang