前馈线性功率放大器的设计与关键技术  

Design and Key Technology of Feed-forward Linear Power Amplifier

作　　者：付瑞改[1] 韩军[1] 皇甫一江 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]海军驻北京地区电子设备军事代表室,北京100089

出　　处：《计算机与网络》2008年第13期29-31,共3页Computer & Network

摘　　要：介绍了前馈线性功率放大器的基本原理和设计方案,指出实际中采用的是自适应的前馈功率放大器系统;指出前馈线性功率放大器设计的关键技术主要是:矢量调节器的设计、自适应方法和控制系统;指出矢量调节器中的关键器件是数字可变移相器,提出了一种数字可变移相器的设计方案;提出了3种自适应方法:导频法、最小功率检测法和相关检测法,并分析其优缺点;提出控制系统是前馈线性功率放大器系统的核心器件,也是设计的关键器件。The basic principle and the design scheme of the feed-forward linear power amplifier are introduced.It is the adaptive feed-forward linear power amplifier that is adopted in practice.Core technologies for the feed-forward linear power amplifier are pointed out including design of vector adjuster,design of self-adaption and of control system.In the vector adjuster,the key device is the digital variable phase shifter and a design scheme for it is presented.Three adaptive methods are put forward and analyzed including pilot signal,minimizing the measured power signal and relativity of the measured power signal.Finally,it is pointed out that the control system is the key device in the feed-forward linear power amplifier.

关 键 词：前馈线性功率放大器 矢量调节器 自适应 控制系统 

分 类 号：TN722.75[电子电信—电路与系统]