一款应用于802.11ax的5.3~7.4 GHz CMOS低噪声放大器设计  

A 5.3⁃7.4 GHz CMOS LNA Design for 802.11ax Applications

作　　者：蒋欣怡 石春琦[1,2] 黄磊磊 徐珑 张润曦[1] JIANG Xinyi;SHI Chunqi;HUANG Leilei;XU Long;ZHANG Runxi(Institute of Microelectronic Circuits and Systems,East China Normal University,Shanghai,200241,CHN;Key Laboratory of Multidimensional Information Processing,East China Normal University,Shanghai,200241,CHN)

机构地区：[1]华东师范大学微电子电路与系统研究所,上海200241 [2]华东师范大学上海市多维度信息处理重点实验室,上海200241

出　　处：《固体电子学研究与进展》2025年第1期52-58,共7页Research & Progress of SSE

基　　金：上海市科委资助项目(22DZ2229004);中央高校基本科研业务费专项资金资助项目(40500-20103-222178)。

摘　　要：为满足IEEE 802.11ax应用的低噪声和大带宽需求,设计了一款5.3~7.4 GHz宽带低噪声放大器(Low noise amplifier, LNA)。采用无源变压器作为辅路,实现噪声抵消,在优化噪声系数的同时不增加功耗,与未采用噪声抵消的方案相比,噪声系数改善0.27 dB。采用开关电容阵列,实现可调谐级间网络,子带带宽和整体调谐带宽分别为700 MHz和2.1 GHz。基于等Q圆策略设计宽带输出匹配网络。该款LNA采用22 nm CMOS工艺实现,芯片测试结果表明:3 dB带宽达到2.1 GHz,峰值增益为26.5 dB,在5.3~7.4 GHz频段内,噪声系数均小于2.53 dB,增益大于23.5 dB,功耗为43.05 mW。To fulfill the requirements for low noise and wide bandwidth in IEEE 802.11ax applica-tions,a wideband low noise amplifier(LNA)operating at 5.3-7.4 GHz was designed.By utilizing a passive transformer for noise cancellation,the noise figure is improved by 0.27 dB compared to non-cancellation designs,without increasing power consumption.The device incorporated a switched capacitor array for a tunable inter-stage network,providing 700 MHz sub-band and 2.1 GHz overall tuning bandwidths.Additionally,a wideband output matching network was designed based on the constant-Q circle strategy.Fabricated in 22 nm CMOS process,the chip testing results demonstrate a 3 dB bandwidth of 2.1 GHz and a peak gain of 26.5 dB.Furthermore,the noise figure remains below 2.53 dB,and the gain exceeds 23 dB across the entire 5.3 to 7.4 GHz spectrum,with a power con-sumption of 43 mW.

关 键 词：低噪声放大器 无源辅路噪声抵消 调谐宽带 802.11ax 

分 类 号：TN432[电子电信—微电子学与固体电子学]