6.5~10 GHz超宽带低噪声放大器的抗干扰设计  

Interferer Rejection Design of a 6.5~10 GHz UWB Low Noise Amplifier

作　　者：高宇飞 雷倩倩[1,2] 徐化 刘启航 李连碧 冯松[1,2] GAO Yu-fei;LEI Qian-qian;XU Hua;LIU Qi-hang;LI Lian-bi;FENG Song(School of Science,Xi’an Polytechnic University,Xi’an,Shaanxi 710048,China;Engineering Research Center of Flexible Radiation Protection Technology of Universities of Shaanxi Province,Xi’an,Shaanxi 710048,China;Shenzhen New Radio Technology Co.,Ltd.,Shenzhen,Guangdong 518000,China)

机构地区：[1]西安工程大学理学院,陕西西安710048 [2]射线柔性防护技术陕西省高校工程研究中心,陕西西安710048 [3]深圳市纽瑞芯科技有限公司,广东深圳518000

出　　处：《电子学报》2023年第7期1970-1976,共7页Acta Electronica Sinica

基　　金：国家重点研发计划(No.2018YFB2200500)。

摘　　要：本文基于SMIC 28 nm CMOS工艺设计了一款应用于超宽带协议的具有带外噪声抑制功能的全集成低噪声放大器(Low Noise Amplifier,LNA),并提出了一种新型的LC串并联两级滤波结构.通过利用滤波器极点补偿LNA带内增益的设计方法,合理设计滤波负载等效电路的极点,使其略高于零点频率,在保证了LNA通带增益和噪声的情况下提高了滤波深度.对所设计的LNA进行了EMX建模及仿真验证.结果表明,该LNA在6.5~10 GHz的工作频带内,S_(21)高达21.17~25.28 d B,S_(11)小于-10.58 d B;S_(22)小于-11.20 d B,带内噪声系数仅为2.14~2.51 d B;带阻滤波器在5.8 GHz处可提供-35.45 d B的噪声抑制;在0.9 V供电电压下,LNA的静态功耗仅为9.36 m W.In this paper,a fully integrated low noise amplifier(LNA)with interferer rejection(IR)for ultra wide band(UWB)protocol is designed based on SMIC 28 nm CMOS process.And a novel series and parallel LC two-stage filtering configuration is proposed.By using the poles of the filter to compensate the LNA gain,the pole of the equivalent circuit of the filtering load is designed properly.By setting the pole to be slightly higher than the zero,the filtering depth is optimized while the gain and noise of the LNA band keep unharmed.EMX modeling and simulation of the LNA are implemented,and the results show that the S_(21)of the LNA is 21.17~25.28 dB in the band of 6.5~10 GHz,S_(11)and S_(22)are less than-10.58 dB and-11.20 dB respectively,the in-band noise figure is 2.14~2.51 dB.The notch filter achieves-35.45 dB IR ratio at 5.8 GHz.The static power consumption of LNA is only 9.36 mW under 0.9 V supply voltage.

关 键 词：超宽带 零极点分析 LC滤波器 低噪声放大器 

分 类 号：TN722.3[电子电信—电路与系统]