并发双波段Doherty射频功率放大器  

Design of Concurrent Dual-band Doherty RF Power Amplifier

作　　者：李瑞阳[1] 刘太君[1] 叶焱[1] 张勋[1] 王洋[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《固体电子学研究与进展》2015年第1期52-55,共4页Research & Progress of SSE

基　　金：国家自然科学基金资助项目(61171040);浙江省自然科学基金资助项目(Y1101270);宁波大学学科项目(XKL141038)

摘　　要：通过分析并发双波段阻抗变换网络,设计了双波段延时线以及双波段四分之一波长阻抗变换网络。在传统Doherty功率放大器基础上,运用双波段阻抗变换网络,设计了一款并发双波段Doherty。为了验证该并发结构的可行性,采用CREE公司的GaN功放管,设计了一款工作在2.1GHz以及2.5GHz频带的Doherty功率放大器,并实现了双频带内输出功率回退6dB时漏极效率大于33%,输出功率大于41.5dBm,且合路增益10dB左右。测试结果表明,并发双波段Doherty功放将更适合现代通信对多模多波段的要求。By analyzing concurrent dual-band impedance transformation network,the dualband delay line and dual-band quarter-wave impedance transformation network are designed.According to the conventional Doherty amplifier′s technology,a concurrent dual-band Doherty is presented by using dual-band impedance transformation network.To verify the feasibility of the concurrent structure,a dual-band Doherty power amplifier was designed by employing CREE′s GaN power amplifier in 2.1GHz and 2.5GHz.The results were,at 6dB of output power backoff,the drain efficiency higher than 33%in the dual-band,and the maximum power higher than41.5dBm,as well as the gain around 10 dB.The experimental results demonstrate the concurrent dual-band Doherty amplifier will be more suitable for the requirements of the multi-mode multi-band communication.

关 键 词：DOHERTY 功率放大器 双波段 

分 类 号：TN722[电子电信—电路与系统]