一种小型化超宽带功率放大器的设计  

Design of a Miniature Ultra Wideband Power Amplifier

作　　者：安士全[1] 郭本青[2] 张瑞[1] 

机构地区：[1]中国电子科技集团公司第38研究所,合肥230031 [2]电子科技大学通信与信息工程学院,成都610054

出　　处：《中国电子科学研究院学报》2014年第6期639-642,共4页Journal of China Academy of Electronics and Information Technology

摘　　要：针对超宽带(0.6 GHz^2.2 GHz)高效率功率放大器的设计要求,选用CREE公司Ga N器件CGH40045,在ADS仿真软件中采用Load-Pull技术确定最佳输入输出阻抗,利用基于集总元件和微带线分布参数元件的方法进行输入输出阻抗的宽带匹配。设计完成后,对电路进行了测试,测试结果表明,在输入为34 d Bm,工作电压为28 V时,0.6 GHz^2.2 GHz频率范围内漏极效率优于50%,输出功率高于45 d Bm,带内增益波动小于1.2 d B,验证了此方法的有效性。Concerning the design goal of a highly efficient power amplifier working across 0. 6 GHz -2. 2 GHz,the Ga N transistor CGH40045 of CREE Company is selected. The optimal input and output impedance is calculated with the help of Load-Pull technology in software ADS,realizing broadband matching with integrative devices and distributed components. Simulation is performed and produced based on the methodology. The measurement results indicate that within 0. 6 GHz - 2. 2 GHz,Drain Efficiency excels 50%,Delivered Power is higher than 45 dBm and Gain Ripple is less than 1. 2 dB as the drain bias and power drive sets to 28 V and 34 dBm respectively. These research data well verified the effectiveness of the methodology.

关 键 词：功率放大器 宽带 高效率 负载牵引 

分 类 号：TG722.1[金属学及工艺—刀具与模具]