负载牵引法在开关类功率放大器设计中的应用  

Application of Load-pull in Switch-mode Power Amplifier Design

作　　者：孙殿举[1] 吴学杰[1] 侯磊[1] 刘儒[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《现代电子技术》2010年第5期191-192,196,共3页Modern Electronics Technique

摘　　要：为提高开关类功率放大器设计的准确性,找出功放管的最优输出阻抗值,采用负载牵引法设计开关类功率放大器,得到最佳输出阻抗值,然后设计输出及输入匹配网络及谐波抑制网络,仿真结果输入功率为28 dBm时,功率附加效率达到69.352%,表明功率负载牵引方法为改进开关类放大器设计,优化开关类功放管性能提供了快速而有效的方法,提高了大信号下模型的准确性。To improve the accuracy of switch- mode power amplifier design and find the power amplifier optimum impedance, load- pull approach is adopted to design switch- mode power amplifier, the optimal output impendence is obtained, out- put and input matching network and harmonic traps are designed, the simulation results show that the power - added efficiency of 69. 352 % with the input power of 28dBm is achieved,load- pull provides quick and efficiency approach,raises large- signal model accuracy for improving switch - mode power amplifier design and performance.

关 键 词：负载牵引 开关类 功率放大器 最优阻抗 功率附加效率 

分 类 号：TN722.75[电子电信—电路与系统]