宽频带低噪声放大器设计

摘要

采用Lange耦舍器的宽频带特性设计L/S波段平衡式低噪声放大器电路,并通过仿真设计软件对放大器的工作频带、噪声系数、增益及输入、输出驻波比等几个重要指标进行优化.最后设计的放大器在1.2～2.5 GHz频率范围内增益为33～35 dB,噪声系数不大于1 dB,输入输出驻波比小于1.5,达到了预定的技术指标要求,性能良好.%The broadband characteristic of Lange couplers was used to design L/S band balanced broadband low noise amplifier, and a simulated design software was used to optimize the operating frequency, noise figure, gain, input and output SWR and other several important indicators. The designed amplifier whose gain is 33~35 Db, noise figure^l Db, input and output SWR <1. 5 when the frequency rang is 1. 2~2. 5 GHz. The low noise amplifier has prefect performance and meets the technical requirements.