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1. CN107453714 - Doherty power amplifier based on two state matching and two state matching method

Office China
Application Number 201710450466.5
Application Date 15.06.2017
Publication Number 107453714
Publication Date 08.12.2017
Publication Kind A
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
H03F 1/42
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
42Modifications of amplifiers to extend the bandwidth
H03F 3/20
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
CPC
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
H03F 1/42
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
42Modifications of amplifiers to extend the bandwidth
H03F 3/20
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
Applicants JIANGSU UNIVERSITY
Inventors XIA JING
CHEN XIAO'EN
ZHU SHUAILEI
KONG WA
DING DAWEI
YANG LIXIA
Title
(EN) Doherty power amplifier based on two state matching and two state matching method
(ZH) 一种基于双状态匹配的Doherty功率放大器及双状态匹配方法
Abstract
(EN)
The invention discloses a Doherty power amplifier based on two state matching and a design method of the Doherty power amplifier. The Doherty power amplifier comprises a power divider, a carrier amplification circuit, a peak amplification circuit and a combiner load. The two output ends of the power divider are connected with the input end of the carrier amplification circuit and the input end of the peak amplification circuit respectively; the carrier amplification circuit is formed by connecting a carrier phase compensation line, a carrier input matching network, a carrier power amplifier tube and a carrier output two state matching network in series sequentially; the peak amplification circuit is formed by connecting a peak phase compensation line, a peak power amplifier tube and a peak output two state matching network in series sequentially; and the output end of the carrier amplification circuit and the output end of the peak amplification circuit are directly connected with the combiner load. The carrier output two state matching network and the peak output two state matching network are designed according to a two state matching method. According to the Doherty power amplifier, a compensation line and a gamma/4 impedance conversion line which are arranged at the output end of a traditional Doherty power amplifier are omitted, the circuit size is decreased, power consumption of the output end is reduced, and the efficiency is improved.

(ZH)
本发明公开了一种基于双状态匹配的Doherty功率放大器及其设计方法,包括功率分配器、载波放大电路、峰值放大电路和合路负载。功率分配器两个输出端分别连接载波放大电路和峰值放大电路的输入端;载波放大电路由载波相位补偿线、载波输入匹配网络、载波功放管、载波输出双状态匹配网络依次串联组成;峰值放大电路由峰值相位补偿线、峰值功放管、峰值输出双状态匹配网络依次串联组成;载波放大电路的输出端与峰值放大电路的输出端与合路负载直接相连。载波和峰值输出双状态匹配网络由双状态匹配方法设计。本发明省略了传统Doherty功率放大器输出端的补偿线和λ/4阻抗变换线,减小了电路尺寸,降低了输出端的功率损耗,提高了效率。