High-Frequency Doherty Power Amplifiers: Challenges and Design Approaches

#MTT-S #AP-S #EMC #YP #DL #IEEE
Share
Abstract
Doherty power amplifiers are widely used to achieve high efficiency with high-PAPR signals, but their extension to millimetre-wave frequencies is far from trivial. At high frequency, classical Doherty assumptions no longer hold, and efficiency, gain, bandwidth, linearity, and implementation constraints become strongly interdependent.
This lecture provides a design-oriented perspective on the key challenges limiting high-frequency Doherty operation and discusses practical methodologies to address them. Topics include gain behaviour, on-chip power combination, bandwidth limitations, and linearity degradation, with emphasis on architectural trade-offs rather than idealized solutions. The discussion is supported by measured GaN MMIC examples for 5G and satellite applications.

  Date and Time

  Location

  Hosts

  Registration


  • Add_To_Calendar_icon Add Event to Calendar

Loading virtual attendance info...

  • Contact Event Hosts

  Speakers

Prof Vittorio Camarchia

Topic:

High-Frequency Doherty Power Amplifiers: Challenges and Design Approaches

Abstract

Doherty power amplifiers are widely used to achieve high efficiency with high-PAPR signals, but their extension to millimetre-wave frequencies is far from trivial. At high frequency, classical Doherty assumptions no longer hold, and efficiency, gain, bandwidth, linearity, and implementation constraints become strongly interdependent.

This lecture provides a design-oriented perspective on the key challenges limiting high-frequency Doherty operation and discusses practical methodologies to address them. Topics include gain behaviour, on-chip power combination, bandwidth limitations, and linearity degradation, with emphasis on architectural trade-offs rather than idealized solutions. The discussion is supported by measured GaN MMIC examples for 5G and satellite applications.

Biography:

Vittorio Camarchia is an Associate Professor at the Department of Electronics and Telecommunications, Politecnico di Torino, Italy. His research focuses on high-efficiency and high-linearity RF/microwave power amplifiers for 5G/6G and satellite communications, with emphasis on load-modulated architectures, including Doherty, Chireix, and LMBA amplifiers, GaN/GaAs MMIC design, and broadband linearization. He is Chair of IEEE MTT-S TC-23 Wireless Communications for 2025–2026, a member of IEEE MTT-S TC-12 Microwave High-Power Techniques, and an IEEE MTT-S Distinguished Microwave Lecturer for 2026–2028.