• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2011, Vol. 33 ›› Issue (2): 61-64.doi: 10.3969/j.issn.1007130X.2011.

• 论文 • 上一篇    下一篇

2~5GHz 0.18μm CMOS宽带低噪声放大器设计

何小威,张民选   

  1. (并行与分布处理国防科技重点实验室,湖南 长沙 410073)
  • 收稿日期:2009-10-05 修回日期:2009-12-08 出版日期:2011-02-25 发布日期:2010-02-25
  • 通讯作者: 何小威
  • 作者简介:何小威(1980),男,湖北宜城人,博士生,研究方向为模拟和射频集成电路设计。张民选(1954),男,教授,博士生导师,研究方向为高性能计算机系统结构、微处理器设计及ASIC技术等。
  • 基金资助:

    国家自然科学基金资助项目(60873212)

Design of a 2~5GHz 0.18μm CMOS  Wideband Low Noise Amplifier

HE Xiaowei, ZHANG Minxuan   

  1. (National Laboratory for Parallel and Distributed Processing,Changsha  410073,China)
  • Received:2009-10-05 Revised:2009-12-08 Online:2011-02-25 Published:2010-02-25

摘要:

本文设计实现了一个2~5GHz的两级CMOS低噪声放大器(LNA),可应用在超宽带的下半频段(3.1~5GHz)。LNA由两级组成,第一级是一个共栅级,保持良好的线性度并完成较好的输入匹配;第二级是一个共源级堆叠一个电流源,在保持低噪声系数的同时降低功耗。通过级联共栅和共源结构进行增益补偿,所设计的LNA具有近似恒定的增益和噪声系数。采用0.18μm CMOS工艺实现后,模拟结果表明,增益和噪声系数在2~5GHz频率范围内分别为11.5dB和5.1dB,输入反射系数低于-22dB。在4GHz时,模拟得到的三阶交调点为-10dBm。在1.8V电源电压下,LNA的功耗约为11mW。

关键词: 低噪声放大器, 超宽带, 噪声系数, 三阶交调点

Abstract:

A twostage 25GHz CMOS Low Noise Amplifier(LNA) for the lower side of UltraWideBand(UWB) applications(3.15GHz) is presented. This LNA consists of two stages. The first stage is a commongate structure maintaining good linearity with better input matching; the second stage is a commonsource stage stacked with a current mirror, which obtains low Noise Figure(NF) and reduces the LNA’s power consumption. By introducing commongate and commonsource stages to compensate gain mutually, the proposed LNA has achieved nearly flat power gain and NF. This LNA has been implemented by a 0.18μm CMOS process. The successive simulation results indicate that the power gain(S21) keeps 11.5dB over the wide frequency band of 25GHz with NF 5.1dB and input return loss(S11) below 22dB in the entire band. The simulated inputreferred thirdorder intercept point(IIP3) at 4GHz is 10dBm. The LNA consumes about 11mW under the 1.8V supply.

Key words: low noise amplifier(LNA);ultrawideband(UWB);noise figure(NF);inputreferred thirdorder intercept point(IIP3)