Automatic Optimization of Input Split and Bias Voltage in Digitally Controlled Dual-Input Doherty RF PAs

Mattia Mengozzi, Gian Piero Gibiino, Alberto Maria Angelotti, Alberto Santarelli, Corrado Florian and Paolo Colantonio
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Mattia Mengozzi: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi“, University of Bologna, 40136 Bologna, Italy
Gian Piero Gibiino: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi“, University of Bologna, 40136 Bologna, Italy
Alberto Maria Angelotti: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi“, University of Bologna, 40136 Bologna, Italy
Alberto Santarelli: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi“, University of Bologna, 40136 Bologna, Italy
Corrado Florian: Department of Electrical, Electronic, and Information Engineering “Guglielmo Marconi“, University of Bologna, 40136 Bologna, Italy
Paolo Colantonio: Department of Electronic Engineering, University of Roma Tor Vergata, 00133 Rome, Italy

Energies, 2022, vol. 15, issue 13, 1-16

Abstract: Digitally controlled Dual-Input Doherty Power Amplifiers (DIDPAs) are becoming increasingly popular due to the flexible input signal splitting between the main and auxiliary stages. Nevertheless, the presence of many degrees of freedom, e.g., input amplitude split and phase displacement as well as biasing for multiple stages, often involves inefficient trial-and-error procedures to reach a suitable PA performance. This article presents automated parameter setting based on coordinate descent or Bayesian optimizations, demonstrating an improvement in the performance in terms of RF output power and power-added efficiency (PAE) in the presence of broadband-modulated signals, yet maintaining suitable linear behavior for, e.g., communications applications.

Keywords: RF power amplifiers; Doherty amplifier; optimization; parameter search; digital input control; dual-input power amplifiers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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