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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2400066


Design of wideband symmetrical large back-off range Doherty power amplifier based on impedance and phase hybrid optimization


Author(s):  Zhongpeng NI, Jing XIA, Xin Yu ZHOU, Wa KONG, Wence ZHANG, Xiao-Wei ZHU

Affiliation(s):  School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang 212013, China; more

Corresponding email(s):   jingxia@ujs.edu.cn

Key Words:  Back-off power range, Doherty power amplifier, Fragment-type structure, Impedance-phase hybrid function


Zhongpeng NI, Jing XIA, Xin Yu ZHOU, Wa KONG, Wence ZHANG, Xiao-Wei ZHU. Design of wideband symmetrical large back-off range Doherty power amplifier based on impedance and phase hybrid optimization[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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author="Zhongpeng NI, Jing XIA, Xin Yu ZHOU, Wa KONG, Wence ZHANG, Xiao-Wei ZHU",
journal="Frontiers of Information Technology & Electronic Engineering",
volume="-1",
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pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2400066"
}

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%T Design of wideband symmetrical large back-off range Doherty power amplifier based on impedance and phase hybrid optimization
%A Zhongpeng NI
%A Jing XIA
%A Xin Yu ZHOU
%A Wa KONG
%A Wence ZHANG
%A Xiao-Wei ZHU
%J Journal of Zhejiang University SCIENCE C
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%@ 2095-9184
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/FITEE.2400066

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T1 - Design of wideband symmetrical large back-off range Doherty power amplifier based on impedance and phase hybrid optimization
A1 - Zhongpeng NI
A1 - Jing XIA
A1 - Xin Yu ZHOU
A1 - Wa KONG
A1 - Wence ZHANG
A1 - Xiao-Wei ZHU
J0 - Journal of Zhejiang University Science C
VL - -1
IS - -1
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EP -
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Y1 - 1998
PB - Zhejiang University Press & Springer
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DOI - 10.1631/FITEE.2400066


Abstract: 
The present paper proposes an optimization design method for the Doherty output matching network (OMN) using impedance-phase hybrid objective function constraints, which possess the capability of enhancing the efficiency consistency of the doherty power amplifier (DPA) using integrated enhancing reactance (IER) during the power back-off range. By calculating the desired reactance for an extended power back-off range and combining it with the two-impedance matching method, the S-parameters of the OMN are obtained. Meanwhile, the impedance and phase constraints of the OMN are proposed to reduce the distribution range of the IER. Furthermore, a fragmenttype structure was employed in the OMN optimization so as to enhance the flexibility of the circuit optimization design. To validate the proposed method, a 1.7–2.5 GHz symmetrical DPA with a large back-off power (BOP) range was designed and fabricated. Measurement results demonstrate that across the entire operating frequency band, the saturated output power >44 dBm, and the efficiency ranges from 45% to 55% at a 9 dB BOP.

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