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Power Amplifier Design using λ/4 DGS(Defected Ground Structure) Bias Line  

정시균 (전북대학교 공과대학 전자정보공학부 및 정보통신연구센터)
정용채 (전북대학교 공과대학 전자정보공학부 및 정보통신연구센터)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.13, no.9, 2002 , pp. 924-931 More about this Journal
Abstract
In this paper, a new λ/4 bias transmission line that is added dumbbell-shaped defected ground structure(DGS) on ground plane of the conventional λ/4 bias transmission line is proposed. This DGS λ/4 bias transmission line maintains high characteristic impedance, but physical width is wider and length is shorter than that of the conventional bias line. If the proposed bias line is attached on signal transmission line, this bias line can reduces the $3^{rd}$ harmonic signal as well as the$2^{nd}$ harmonic signal. With harmonic reduction characteristics, efficiency and linearity of amplifier are improved. The proposed bias line is adopted in power amplifier on IMT-2000 base-station transmitting band. This paper presents several simulations and experimental results of DGS to show validity of the proposed power amplifier using the new λ/4 bias transmission line. Experimental results represent that the $3^{rd}$ harmonic signal is reduced about 26.5 dB and efficiency is improved about 9.1 % and IMD3 is improved 4.5 dB than the conventional structure.
Keywords
$\lambda$/4 Bias Transmission Line; Power Amplifier; DGS; IMT-2000; 3rd Harmonic;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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