Sensitivity of AM/AM linearizer to AM/PM distortion in devices

F. L. Ogboi, P. Tasker, Z. Mohkti, J. Lees, J. Benedikt, S. Ben Smida, K. Morris, M. Beach, J. McGeehan

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

2 Citations (Scopus)

Abstract

Baseband injection is a technique that can provide a cost-effective linearizing solution that can be combined with supply modulation techniques such as envelope tracking (ET), to minimize AM/AM distortion and potentially simplify the DSP linearization requirement and associated cost. Recently [8], a new approach for computing the baseband injection stimulus, formulated in the envelope domain, was introduced. The concept was originally demonstrated using a 10W Cree GaN-on-SiC HFET device. In this work its robustness with respect to alternative device technology is investigated using 25W Nitronex NPTB00025 GaN-on-SiC HEMT depletion-mode and a 10W, high-voltage LD-MOS, enhancement-mode devices. Its effectiveness in dealing with AM/AM distortion is confirmed.
Original languageEnglish
Title of host publication83rd ARFTG Microwave Measurement Conference
PublisherIEEE
ISBN (Electronic)9781479944231
DOIs
Publication statusPublished - 18 Sep 2014

Keywords

  • Distortion
  • Modulation
  • Multi-tone
  • Power amplifiers
  • signal

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