CAJ | 학술논문

在分析经典Doherty放大器工作原理基础上，对主从放大器使用不同的漏极偏置电压和电路匹配，设计出一种新型Doherty功率放大器，分析了该结构对于效率和线性化的影响．以飞思卡尔公司的MRF6S20010N功放模型，利用ADS2008对放大器进行静态工作点选取，源负载网络匹配和微带线的计算。结果表明这种功率放大器不但能够提高性能指标，还增强了放大器的稳定性。
재분석경전Doherty방대기공작원리기출상，대주종방대기사용불동적루겁편치전압화전로필배，설계출일충신형Doherty공솔방대기，분석료해결구대우효솔화선성화적영향．이비사잡이공사적MRF6S20010N공방모형，이용ADS2008대방대기진행정태공작점선취，원부재망락필배화미대선적계산。결과표명저충공솔방대기불단능구제고성능지표，환증강료방대기적은정성。
Linearization technique of power amplifier （PA） is important in communication system. Efficiency im-provement technique is a key to linear amplifier. Based on the classic Doherty amplifier, a new Doherty power am-plifier is explored, and different drain voltage and matching network are set for both carrier amplifier and peak am- plifier. The efficiency and linearity of the amplifier are analyzed in detail. Through a transistor model provided by Freescale MRF6S20010N, ADS2008 is used for selecting static point, matching the network of load and source im-pedance, and computing the width and length of microstrip line. Simulation results show that this power amplifier performs well in linearity, efficiency and stability.