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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-09-09
Miniaturized Dual-Band Matching Technique Based on Coupled-Line Transformer for Dual-Band Power Amplifiers Design
By
Shun Li,

    Mr. Shun Li

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Bihua Tang,

    Dr. Bihua Tang

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yuan'an Liu,

    Dr. Yuan'an Liu

    School of Telecommunication Engineering,

    Beijing University of Posts and Telecommunications

    China

    Homepage

Shulan Li,

    Dr. Shulan Li

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Cuiping Yu,

    Dr. Cuiping Yu

    School of Telecommunication Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Yongle Wu

    Prof. Yongle Wu

    School of Electronic Engineering

    Beijing University of Posts and Telecommunications

    China

    Homepage

Progress In Electromagnetics Research, Vol. 131, 195-210, 2012
doi:10.2528/PIER12072004 | Google Scholar

Abstract
This study presents a novel miniaturized dual-band coupled-line impedance transformer. This dual-band matching technique uses the characteristics of coupled-line and dual-band stubs to realize matching arbitrary complex impedance to arbitrary complex impedance at two arbitrary uncorrelated frequencies. Especially, it satisfies the demand of dual-band matching at two relatively closed operating frequencies (n= f2 / f1 ≤ 1.2), and occupy a very small circuit area with inherent DC-Block function. The proposed synthesis approach is validated by the design and fabrication of a 30 W gallium nitride (GaN)-based class-AB power amplifier (PA) for GSM and WCDMA at 1800 MHz and 2140 MHz. The PA's output matching network based on the proposed structure can accurately match 50 Ω to the ideal load impedances of the transistor at two designed frequency simultaneously and has 20% and 15% bandwidth for which the reflection coefficient magnitudes are less than 0.1, respectively.
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Citation
Shun Li, Bihua Tang, Yuan'an Liu, Shulan Li, Cuiping Yu, and Yongle Wu, "Miniaturized Dual-Band Matching Technique Based on Coupled-Line Transformer for Dual-Band Power Amplifiers Design," PIER, Vol. 131, 195-210, 2012.
doi:10.2528/PIER12072004
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