基于平衡结构的高效率E类功率放大器设计  

Design of High Efficiency Class E Power Amplifier Based on Balance Structure

作　　者：南敬昌[1] 杜学坤[1] 

机构地区：[1]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105

出　　处：《微电子学》2013年第5期593-597,共5页Microelectronics

基　　金：国家自然科学基金资助项目(60971048);辽宁省博士启动基金资助项目(20091033)

摘　　要：针对E类功率放大器输入输出回波损耗较大的缺陷,提出采用平衡结构的E类功率放大器的设计方法。仿真结果显示,在输入为28dBm时,功率附加效率(PAE)达到最大(85.2%),集电极效率η为88.3%,输出功率为42.4dBm;在320～360 MHz频率范围内,S11小于-19dB,S22小于-15dB,输入驻波系数小于1.3,输出驻波系数小于1.4;在325～355MHz范围内,PAE达到60%以上,具有较大的高效率带宽。输出匹配网络采用二次谐波抑制技术,谐波失真得到较好的抑制,二次谐波失真达到-92.4dBc。A Class E power amplifier based on balance structure was designed to deal with its large input/output return loss Simulation results showed that, for an input power of 28 dBm, the proposed circuit had a maximum power added efficiency （PAE） of 85. 2%, a collector efficiency of 88. 3%, and an output power of 42. 4 dBm; in the frequency range from 320 MHz to 360 MHz, it achieved an Sn less than-19 dB, an S22 less than -15 dB, input and output VSWR below 1. 3 and 1. 4, respectively; and in the frequency range between 325 MHz and 355 MHz, the power amplifier obtained a PAE over 60%, indicating a large and high-efficiency bandwidth. Secondary harmonic suppression technique was adopted for output rnatching network to obtain better secondary harmonic inhibition, which reached-92. 4 dBc.

关 键 词：平衡结构 E类放大器 驻波系数 二次谐波抑制 

分 类 号：TN722.7[电子电信—电路与系统]