高效率高谐波抑制功率放大器的设计  

Design of a highly efficient and high harmonic suppression power amplifier

作　　者：陈思弟 郑耀华[1] 章国豪 

机构地区：[1]广东工业大学,广东广州510006

出　　处：《电子技术应用》2015年第4期60-62,68,共4页Application of Electronic Technique

摘　　要：介绍了一种对功率放大器高次谐波处理的方法 ,该方法通过在输出低通匹配网络中引入多个LC谐振网络来对功率放大器产生的谐波能量进行回收,抑制了负载处的谐波分量,同时也提高了功放的效率。利用该方法采用In Ga P/Ga As HBT工艺设计了一个供电电压为5 V、工作于2 GHz频率的功率放大器。测试结果表明,该功率放大器的增益为35 d B,饱和输出功率为35.2 d Bm,效率为48%,2次到5次的谐波分量分别为:-53 d Bc、-58 d Bc、-65 d Bc、-60 d Bc。This paper presented a method to process the high order harmonic component of power amplifier. This method improved the efficiency and the harmonic performance of power amplifier by introducing some LC resonant network in the lowpass output matching network. With this method, a power amplifier worked on the 2 GHz was designed using InGaP/GaAs HBT technology and a supply voltage of 5 V. The measure results showed that a gain of 35 dB and the 35.2 dBm saturated output power were achieved. When worked in the saturated situation, the power amplifier showed 48% of PAE. From second to fifth order, the harmonic components were -53 dBc, -58 dBc, -65 dBc, -60 dBc.

关 键 词：功率放大器 效率 谐波抑制 INGAP/GAAS HBT 

分 类 号：TN432[电子电信—微电子学与固体电子学]