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

Published online by Cambridge University Press:  22 April 2019

Shinichi Tanaka ,
Tomoya Oda  and
Kento Saiki
Shinichi Tanaka*
Affiliation:
Graduate School of Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
Tomoya Oda
Affiliation:
Graduate School of Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
Kento Saiki
Affiliation:
Graduate School of Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
*
Author for correspondence: S. Tanaka, E-mail: s-tanaka@shibaura-it.ac.jp
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Abstract

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.

Keywords

Power amplifiersClass-F amplifiersPower-added efficiencyHarmonic tuning techniquesComposite right-/left-handed transmission linesDC-biasing circuitDispersion diagram
Type
EuMW 2018
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Special Issue 7: MIKON 2018 / EuMW 2018 (Part II) , September 2019 , pp. 618 - 624
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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