射频功率放大器是无线系统的重要组成部分之一，驱动级功放则为下一级射频功率放大器提供足够的输入功率。传统驱动功放的设计基本是依靠经验调试，搭建基本的电路后进行多次调试，以达到设计指标。该文运用ADS软件仿真和实际测试相结合的方法快速设计射频驱动功率放大器，设计了一款应用于Doherty射频功率放大器的前级驱动功放，中心频率为2.6GHz，平均输出功率为30dBm，功率增益为16dB。驱动功放的实物测试增益为15dB，1dB压缩点的输出功率为39dBm，功率附加效率为31%，基本达到设计要求。利用实际测试校正仿真参数，通过仿真指导实际调试，能够缩短射频功率放大器的设计周期，节约制作成本。%The RF power amplifier is an important component of the wireless system.The driver stage amplifier provides sufficient input power to the next level of RF power amplifier.The traditional design method does many times test by constructing test circuit to meet the design requirement,which depends on test experi-ences.This paper presents a design of drive stage power amplifier for the Doherty RF power amplifier by combination of software simulation and actual test,which operates at 2.6GHz,the average output power is 30dBm,and the power gain is 16dB.The actual test results show that the gain is 15dB,the out power of 1dB c-ompression point is about 39dBm,and the PAE is 31%.The actual test could rectify the simulation parameters, in return,the simulation could guide the actual test.The design method could shorten the design cycle and save the production cost.
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