平衡式Ku波段低噪声放大器ADS仿真

平衡放大技术具有驻波特性好,增益高,易级联等特点。这里把平衡放大技术应用到Ku波段低噪声放大器的设计当中,在保证低噪声和功率增益的同时,用以提高低噪放的驻波比和增益平坦度。ADS仿真结果显示,在10～12 GHz频带范围内,低噪声放大器绝对稳定,噪声系数≤0.7 dB,功率增益达到≤10 dB,通过采用平衡放大技术,输入输出驻波比≤1.12∶1,带内波动≤0.5 dB。提高了低噪声放大器的有效工作带宽。

Simulation of a Balanced Ku Band Low Noise Amplifier Based on ADS

Being possessed the advantages such as good voltage standing wave ratio（VSWR）,high gain and easily to be cascaded,the balanced amplifying technique is applied in a Ku band low noise amplifier（LNA） simulation in this paper to improve VSWR and gain flatness of LNA while ensuring the low noise and power gain.The simulation results by using ADS show that the LNA is absolutely stable within the band range of 10～12GHz,and the noise figure≤0.7dB,and power gain reaches≤10dB.By utilizing balanced amplifying technique,the input and output VSWR≤1.12∶1,and in-band ripple≤0.5dB,the effective operation bandwidth of the LNA is improved.