A 2.0 GHz CMOS triple cascode push-pull power amplifier with second harmonic injection for linearity enhancement

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

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

Abstract

A novel linearization technique to a CMOS push-pull power amplifier (PA) by second harmonic injection has been proposed. In order to inject second harmonics to the PAs, a new balun with a branching filter has been proposed and fabricated by using multi-layered organic substrates. The PA was fabricated in 0.18-μm CMOS process and was implemented on the balun by flip-chip connection. Because of the low breakdown voltage of CMOS power transistors, triple cascode configuration was adapted. The proposed push-pull PA has delivered an output power of 28.6 dBm with a power-added efficiency (PAE) of 42.2 % at 2.0 GHz and 5.4 V supply voltage. It has been also demonstrated that using second harmonic injection from input port of the PA, PAE and output power with a wideband code division multiple access (WCDMA) modulated signal are improved by 5 % and 2.0 dB respectively at adjacent channel leakage power ratio (ACLR) of-39 dBc.

Original languageEnglish
Title of host publicationEuropean Microwave Week 2014
Subtitle of host publication"Connecting the Future", EuMW 2014 - Conference Proceedings; EuMIC 2014: 9th European Microwave Integrated Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages321-324
Number of pages4
ISBN (Electronic)9782874870361
DOIs
Publication statusPublished - 2014 Dec 23
Event9th European Microwave Integrated Circuits Conference, EuMIC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014 - Rome, Italy
Duration: 2014 Oct 62014 Oct 7

Publication series

NameEuropean Microwave Week 2014: "Connecting the Future", EuMW 2014 - Conference Proceedings; EuMIC 2014: 9th European Microwave Integrated Circuits Conference

Conference

Conference9th European Microwave Integrated Circuits Conference, EuMIC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
CountryItaly
CityRome
Period14/10/614/10/7

Keywords

  • CMOS power amplifiers (PA)
  • adjacent channel leakage power ratio (ACLR)
  • balun
  • harmonic injection
  • linearity
  • planar balun
  • wideband code division multiple access (WCDMA)

ASJC Scopus subject areas

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

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