Design of a C-Band High-Efficiency Doherty Power Amplifier With Harmonic Control

被引：2

作者：

Shi, Wen ^{[1
]}

He, Songbai ^{[1
]}

Shi, Weimin ^{[2
]}

Shen, Ce ^{[1
]}

Li, Chuan ^{[1
]}

Wu, Jiayan ^{[1
]}

Xiao, Zehua ^{[1
]}

You, Fei ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Elect Engn, Chengdu 611731, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2022年 / 32卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Harmonic analysis; Delays; Impedance; Transistors; C-band; Power system harmonics; Wireless communication; Doherty power amplifier (DPA); equivalent parasitic network (EPN); harmonic control; postmatching;

D O I：

10.1109/LMWC.2022.3157775

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A design methodology of a C-band high-efficiency Doherty power amplifier (DPA) with harmonic control is presented in this letter. The equivalent parasitic network (EPN) of the packaged device is constructed by a deembedding technique. The phase delay caused by the transistor parasitics is calculated using the scattering matrix of the EPN. Besides, the influence of the phase delay on DPA design is analyzed. To improve the efficiency at output back-off (OBO) power level, postmatching network (PMN) is used to control the second harmonic. A high-efficiency DPA working over 6.4-7.1 GHz is implemented, fabricated, and measured. The DPA delivers a saturation output power ( $P_{sat}$ ) of 39.6-41.6 dBm. Meanwhile, the drain efficiencies in the interested frequency band are 45.1%-53.2% and 34.5%-43.1% at the $P_{sat}$ and 6-dB OBO power levels, respectively.

引用

页码：875 / 878

页数：4

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