Novel DC-biasing circuits with arbitrary harmonics-control capability for compact high-efficiency power amplifiers

Shinichi Tanaka, Tomoya Oda, Kento Saiki

Research output: Contribution to journalArticle

1 Citation (Scopus)


The next generation mobile communication systems impose challenging performance, size, and cost requirements on the power amplifiers (PAs). This paper presents novel DC-biasing circuits, which are compact and yet can control the harmonics almost arbitrarily. The proposed circuit consists of a composite right-/left-handed (CRLH) transmission line (TL) stub, of which the size and harmonics-control function can be tuned by modifying the dispersion diagram of the stub line. As a proof of concept, a compact 2-GHz 7-W GaN HEMT class-F PA using the versatile CRLH-TL stubs was fabricated, demonstrating 85.8% drain efficiency and 77.3% power-added efficiency.

Original languageEnglish
JournalInternational Journal of Microwave and Wireless Technologies
Publication statusPublished - 2019 Jan 1



  • Class-F amplifiers
  • Composite right-/left-handed transmission lines
  • DC-biasing circuit
  • Dispersion diagram
  • Harmonic tuning techniques
  • Power amplifiers
  • Power-added efficiency

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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