S波段宽带微波固态功率放大器的设计

Design of S-band Wideband Microwave Solid State Power Amplifier

微波功率放大器是发射机的重要组件,它的设计成了微波发射系统的关键.文中使用ADS仿真软件对一款功率放大器进行电路设计和仿真,根据晶体管的小信号S参数和I-V曲线,对功率管的输入、输出阻抗匹配电路及其偏置电路进行优化设计,使其性能达到设计要求.在2～2.5GHz的频段内,对输入功率为0dBm射频信号,使用功放模块可以输出40dBm的射频信号,带内波动≤±1.5dB.

An microwave power amplifier is the key component of transmitters.Its design becomes the most important.The ADS simulation software was used to design and simulate a power amplifier.According to transistor＇s small signal S parameters and I-V curves,an optimized design is made of the power tube＇s input and output impedance match circuit and its bias circuit making its performance to achieve the requirements.With the 2～2.5 GHz frequency band,the radio frequency signal with odbm input power can be output 40 dBm by using a power amplifier module,and its fluctuation band is equal to and less than ±1.5 dB.