基于变压器反馈的紧凑型宽带低噪声放大器  

Compact wideband low noise amplifier using transformer feedback

作　　者：孟伟良 文进才[1] MENG Weiliang;WEN Jincai(Key Laboratory for RF Circuits and Systems,Ministry of Education,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学射频电路与系统教育部重点实验室,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2023年第1期8-14,共7页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(61941103)。

摘　　要：运用变压器反馈技术,基于65 nm CMOS工艺设计了一款紧凑型宽带低噪声放大器。电路采用两级共源共栅结构,基于变压器的输入匹配网络实现了宽带输入匹配,漏源正反馈提高了电路的增益,漏源负反馈增强了其稳定性,电路总面积仅为0.156 mm^(2)。仿真结果表明,设计的宽带低噪声放大器的最大增益为18.2 dB,3dB带宽为31~45 GHz,1 dB带宽为32~44 GHz。在36 GHz时,最低噪声系数为4.5 dB,1dB带宽内噪声系数均低于5.2 dB。Using transformer feedback technique,a compact broadband low noise amplifier is designed based on 65 nm CMOS process.The circuit adopts a two-stage cascode structure.The transformer-based input matching network realizes broadband input matching.The drain-source positive feedback improves the gain of the circuit,and the drain-source negative feedback enhances its stability.The total circuit area is only 0.156 mm^(2).The simulation results show that the designed wideband LNA has the maximum gain of 18.2 dB,the 3dB bandwidth of 31~45 GHz,and the 1dB bandwidth of 32~44 GHz.At 36 GHz,the lowest noise figure is 4.5 dB,and the noise figures are all below 5.2 dB in the 1dB bandwidth.

关 键 词：毫米波 低噪声放大器 共源共栅 变压器反馈 

分 类 号：TN432[电子电信—微电子学与固体电子学]