3～6GHz微波宽带限幅放大器的研制

Design of 3 ～ 6GHz Broadband Limiting Amplifier

根据微波晶体管的饱和输出特性和并联负反馈的宽带电路匹配方法，并采用模块化的设计方法，研制出3～6GHz微波宽带限幅放大器。该放大器应用厚膜、混合集成电路工艺，由多个限幅放大器模块级联组成，仿真结果表明。在3-6GHz频带内，小信号增益大于73dB，输入输出驻波比小于2．0：1，噪声系数小于4．5，在输入信号动态范围-50-0dBm时，饱和输出功率为6±2dBm。

A 3 ～ 6 GHz broadband limiting amplifier is realized in the theories about the output saturation power of transistor and the matching technology of broadband amplifier. The limiting amplifier is implemented by cascade of several gain stage modules and thick film assembly process, The gain of the amplifier is higher then 75dB and the VSWR is Less then 2.0 for an over 3 ～ 6 GHz frequency range. The output saturation power is 7 ± 2dBm for an over - 60 ～ 0dBm input dynamic range.