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1. CN102142812 - Doherty power amplifier

Office China
Application Number 201010605271.1
Application Date 17.12.2010
Publication Number 102142812
Publication Date 03.08.2011
Grant Number 102142812
Grant Date 28.08.2013
Publication Kind B
IPC
H03F 1/07
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
04in discharge-tube amplifiers
06to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
07Doherty-type amplifiers
CPC
H03F 1/0288
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
0205in transistor amplifiers
0288using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers
Applicants Huawei Technologies Co., Ltd.
华为技术有限公司
Inventors Su Yongge
苏永革
Jiao Liuyan
焦留彦
Wang Laiqing
王来清
Yang Lei
杨磊
Zhang Shunzhong
张顺忠
Agents liu fang
Title
(EN) Doherty power amplifier
(ZH) Doherty功率放大器
Abstract
(EN)
The invention discloses a Doherty power amplifier which comprises a wideband shunt, a wideband power amplifying circuit, a wideband combining electric bridge and a nonlinear phase network, wherein the wideband power amplifying circuit comprises a wideband main power amplifier and a wideband auxiliary power amplifier; the wideband shunt is respectively connected with the input end of the wideband main power amplifier and the input end of the wideband auxiliary power amplifier, the output end of the wideband main power amplifier and the output end of the wideband auxiliary power amplifier are respectively connected with the input end of the wideband combing electric bridge, the isolation end of the wideband combining electric bridge is connected with the nonlinear phase network, and the output end of the wideband combining electric bridge is used for connecting with a load; and the nonlinear phase network is used for regulating a reflection phase angle of the isolation end of the wideband combining electric bridge at more than one working frequency band of the Doherty power amplifier. The Doherty power amplifier can reach an optimal working state at a plurality of working frequency band and has high wideband efficiency.

(ZH)

本发明公开了一种Doherty功率放大器,包括:宽带分路器、宽带功率放大电路、宽带合路电桥和非线性相位网络,宽带功率放大电路包括宽带主功率放大器和宽带辅助功率放大器;宽带分路器分别连接宽带主功率放大器和宽带辅助功率放大器的输入端,宽带主功率放大器和宽带辅助功率放大器的输出端分别连接宽带合路电桥的输入端,宽带合路电桥的隔离端连接非线性相位网络,宽带合路电桥的输出端用于连接负载;非线性相位网络用于调节所述宽带合路电桥的隔离端在一个以上Doherty功率放大器的工作频段所需的反射相角。本发明Doherty功率放大器可以在多个工作频段达到最佳工作状态,宽带效率高。