Inverse active load-pull in an inverse Doherty amplifier

Thomas M. Hone, Souheil Ben Smida, Kevin A. Morris, Mark A. Beach, Joe P. McGeehan, Jonathan Lees, Johannes Benedikt, Paul J. Tasker

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

1 Citation (Scopus)


A dedicated inverse Doherty amplifier is presented in this paper using commercially available 10W GaN HEMT devices. Results show that an emulated 1W peaking amplifier and a 10W carrier amplifier can be used to create a highly efficient amplification architecture. Ideal inverse active load-pull is introduced theoretically with experimental results showing good agreement with the theory. A generic characterization scan of the inverse Doherty amplifier yields state of the art drain and power added efficiency in the output power back-off. A drain and power added efficiency of 60% and 50% are obtained at 10dB output power backoff respectively with a maximum output power of 41dBm at 2.1GHz.
Original languageEnglish
Title of host publication 2013 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications
Number of pages3
ISBN (Electronic)978-1-4673-2918-7
ISBN (Print)978-1-4673-2915-6
Publication statusPublished - 2013


  • Digital Doherty
  • Dual-drive
  • Inverse active load-pull


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