文档介绍：华中科技大学
硕士学位论文
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姓名:马世玺
申请学位级别:硕士
专业:软件工程
指导教师:张科峰
20090525
华中科技大学硕士学位论文
摘要
目前无线通信技术的正朝着多标准,宽频段的方向发展,为了使无线通信设备
能在宽频带工作,无线通信设备的射频前端必须满足宽频带的要求。而低噪声放大
器作为射频无线接收机的第一级,也必须满足宽频带的要求,它对整个接收机的性
能起至关重要的作用,特别是对系统的噪声和灵敏度有着决定性的作用。由于 CMOS
易于集成,工艺相对成熟,所以研究 CMOS 宽带低噪声放大器意义重大。
本论文通过对宽带低噪声放大器原理以及基本实现方法的研究,设计了一种可
以在 - 频段范围内工作的宽带低噪声放大器。文章分析了宽带低噪声
放大器设计难点,并对 MOS 管的噪声与增益特性进行了建模和仿真。采用了二阶巴
特沃斯滤波器作为宽带的输入和输出匹配网络,并对它们的滤波特性和匹配特性进
行了仿真。文章还设计了两级 Cascode 作为主放大电路,并设计了电流镜为放大电
路的提供合适的偏置。采用了功耗约束下的噪声优化方法,对噪声和功耗进行了合
理的折中和优化。
最后基于中芯国际 CMOS 的工艺,用 Cadence 仿真软件对设计的宽带低
噪声放大器的整体电路进行了仿真和验证。仿真结果显示,在工作的 - 宽
频带内噪声声系数最大为。最大增益为 17dB,带内的增益波动为 2dB。1dB
压缩点和三阶交调点分别为- 和 ,输入输出反射系数均小于-10dB,具
有良好稳定性和线性度。各项指标达基本达到到了最初的设计要求。

关键词: 射频集成电路,宽带,CMOS,低噪声放大器,滤波器匹配

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华中科技大学硕士学位论文
Abstract
Now the development of the munications is forward to Multi-standard
and wideband. In order to make the munication systems can work in a
wideband frequency, the RF front end of the wireless equipment must have the ability to
wok beyond a very wide frequency rangy. The Low noise amplifier (LNA) is the first
stage of the wireless receiver, so it is very important for the whole performance of the
receiver, except for the whole noise and Sensitivity. Because of CMOS is easy to
integrated and the technology is very popular, it is very important to researcher the CMOS
wideband low noise amplifier.
After researching the basic theories of the wideband LNA and the way of realization
the wideband LNA, This paper design a wide low noise amplifier working through the
- frequency thesis describes the basic theories of CMOS RF
designing and the ponents and its characters. This paper also analyzes the
theory and model of the noise, and then simulates the characters of the MOS noise modle.
Then from the parameters of LNA, no ideal of the LNA is discussed. This paper also
designs two o