Analysis of optimal outphasing load trajectories for GaN Pas

Paolo Enrico de Falco, Gavin Watkins, Konstantinos Mimis, Souheil Bensmida, Kevin Morris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


This paper presents an analysis of the optimal Z f0 load trajectories of saturated GaN PAs through Z f0 and Z 2f0 load-pull measurements under constant input power on a 900 MHz 10 W PA. It is shown that a DE >50% at 10 dB back-off can be obtained for a range of 160 ? of Z 2f0 when Z f0 is set to its optimal point. The black box combiner design equations are used as a tool to determine the complete outphasing load trajectories for outphasing systems designed for different back-off levels and extract drain efficiency performance for a range of Z 2f0 terminations. When the suboptimal outphasing load trajectories are considered, Z 2f0 is demonstrated to have a greater impact compared to the case Z f0 follows the optimal load trajectories.

Original languageEnglish
Title of host publication2018 Asia-Pacific Microwave Conference (APMC)
Number of pages3
ISBN (Electronic)9784902339451
Publication statusPublished - 17 Jan 2019
Event30th Asia-Pacific Microwave Conference 2018 - Kyoto, Japan
Duration: 6 Nov 20189 Nov 2018


Conference30th Asia-Pacific Microwave Conference 2018
Abbreviated titleAPMC 2018


  • Harmonically tuned PAs
  • Outphasing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Analysis of optimal outphasing load trajectories for GaN Pas'. Together they form a unique fingerprint.

Cite this