2.4 GHz高增益极低噪声放大器设计

摘要

基于ADS仿真技术，提出了微带线代替电感的负反馈方式，保证电路稳定性的同时，采用微带线代替电感、电容实现放大器的匹配，方便调试并节省了成本。经过优化与调试，最终设计了一种2.4 GHz频段极低噪声高增益的低噪声放大器。实测结果与仿真结果保持一致，在2.4 GHz~2.5 GHz范围内，驻波比VSWR≤1.45，增益GAIN≥12 dB，噪声系数NF≤0.63。高增益极低噪声放大器用于WLAN系统，能提高通信距离和通信容量，改善通信质量。%Based on the ADS simulation technology, a negative feedback way is proposed to ensure stability of the circuit by using microstrip line instead of lump inductance, at the same time, matching of noise ampliifer is achieved by using microstrip line instead of lump inductance or capacitance, it is easy to debug and cost saving. Finally, it is designed that A low noise of 2.4 GHz band possess lower noise ifgure and high gain after optimizing and tuning. The experimental results are consistent with the simulation results within a range of 2.4 GHz~2.5 GHz,VSWR≤1.45,GAIN≥12 dB, noise ifgureNF≤0.63. The lower noise ifgure and high gain ampliifer can increase the communication distance and communication capacity, and improve communication quality by using WLAN system.