Class-AB宽带功率放大器匹配方法的设计与仿真  

Design and Simulation of Class-AB Broadband Power Amplifier Matching Method

作　　者：王毅敏 李佳旺 WANG Yi-min;LI Jia-wang(College of Information and Communication,Harbin Engineering University,Harbin Heilongjiang 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《通信技术》2018年第3期727-733,共7页Communications Technology

摘　　要：随着软件定义无线电第三次通信革命的兴起,宽带射频功率放大器成为软件无线电发射系统的关键一环,具有频带宽、动态范围大、体积小、寿命长等优点。针对软件无线电的特点及当今功率放大器的发展趋势,设计研制了一款输出功率在25W以上、工作在30~500MHz的宽带线性功率放大器。采用同轴线进行宽带匹配,通过分析推挽式高频宽带功率放大器的结构模型和工作特点,利用ADS仿真验证设计。以合适的电抗值使功率管的输入输出阻抗的实部达到同轴线匹配的要求,最终得到同轴线长度、特性阻抗和相关元器件的最佳取值。经过调整和优化,使设计达到所需指标。这种转换模型在实际市场中有很好的分析应用前景。With the rise of the third communication revolution in the software-defined radio,the broadband RF power amplifier becomes the key part of the software radio transmission system,and has the advantages of wide bandwidth,large dynamic range,small size,long service life and so on.According to the characteristics of software radio and the development trend of current power amplifier,a broadband linear power amplifier with output power of over25W and30-500MHz working band is designed and developed.By using the coaxial line for broadband matching,and via analyzing the structure model and working characteristics of the push-pull high frequency broadband power amplifier,ADS simulation is done and the design verified.With the appropriate reactance value,the real part of the input-output impedance for the power pipe is made to meet the requirement of the same axis matching.Finally,the coaxial line length,characteristic impedance and the best value of the related components are acquired.After adjustment and optimization,the design reaches the expected indicators.This transformation model has a good prospect of analysis and application in the actual market.

关 键 词：宽带功率放大器 同轴线匹配 推挽式 ADS 

分 类 号：TN722.75[电子电信—电路与系统]