The improvement of efficiency in L-band 10W GaN HEMT power amplifier by harmonic injection

Kenichi Fujii, Kazuma Terajima, Takuji Sonoda, Tadashi Takagi, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

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

1 Citation (Scopus)

Abstract

This paper presents the improvement of efficiency of power amplifiers by 2nd and 3rd harmonics injection with a newly developed triplexer. An L-band 10W GaN HEMT PA with input and output triplexers have been fabricated. The dependence of injection power level on the improvement of efficiency from both input and output injection is studied. The 2nd harmonics injection delivers higher efficiency improvement than that of 3rd harmonics injection. The best injection power of 2nd harmonics for improvement of extended power added efficiency (including additionally harmonics injection power as input power) is 20.5dBm and 26.5dBm for input and output injection, respectively. The PA has achieved the excellent improvement of 10.6% by both input and output 2nd harmonics injection simultaneously. The maximum extended power added efficiency of 64.7% with an output power of 39.9dBm is obtained at 1.5GHz.

Original languageEnglish
Title of host publication2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages786-788
Number of pages3
ISBN (Electronic)9784902339314
Publication statusPublished - 2014 Mar 25
Event2014 Asia-Pacific Microwave Conference, APMC 2014 - Sendai, Japan
Duration: 2014 Nov 42014 Nov 7

Publication series

Name2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014

Other

Other2014 Asia-Pacific Microwave Conference, APMC 2014
Country/TerritoryJapan
CitySendai
Period14/11/414/11/7

Keywords

  • Efficiency improvement
  • GaN HEMT
  • Harmonics injection
  • High power amplifier

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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