基于带通匹配网络理论的宽带高效率功放设计  

Design of a high-efficiency broadband power amplifier based on band-pass match network theory

作　　者：董磊[1] 何松柏[1] 雷奇[1] 

机构地区：[1]电子科技大学集成电路与系统系,四川成都610054

出　　处：《信息与电子工程》2011年第4期449-452,共4页information and electronic engineering

基　　金：国家高技术研究发展863 计划资助项目(60572161)

摘　　要：针对超宽带(2 GHz～4 GHz)高效率功放的设计要求,提出了一种可行的实现方法:采用Load-Pull技术确定最佳输入输出阻抗,并利用基于传输线的带通网络完成了宽带匹配。基于此方法,采用CREE公司GaN HEMT CGH40010进行实际仿真,在输入为27.5 dBm,偏置为28 V时,2 GHz～4 GHz频率范围内功率附加效率优于50%,输出功率高于38.9 dBm,带内增益波动小于2 dB,验证了此方法的有效性。Concerning the design goal of a highly efficient power amplifier working across 2 GHz-4 GHz, this paper proposes an available design methodology： to select the optimal input and output impedance with the help of Load-Pull technology and realize broadband matching with distributed band-pass network. Based on the methodology, using the GaN HEMT CGH40010 from CREE, simulation is performed. The results indicate that within 2 GHz-4 GHz, Power Adding Efficiency excels 50%, Delivered Power is higher than 38.9 dBm and Gain Ripple is less than 2 dB as the Drain Bias and Power Drive sets to 28 V and 27.5 dBm respectively. Hence, the methodology is well verified.

关 键 词：功率放大器 宽带 高效率 集总电路的微带等效 

分 类 号：TN722.75[电子电信—电路与系统]