AT41511射频低噪声放大器的仿真设计
关键词 低噪声放大器 ADS 软件 噪声系数 输入匹配 稳定性
Title The Simulation Design of RF Low Noise Amplifier
Abstract
With the development of wireless communication technology, especially
in the last ten years, the scale of the mobile communication's users
has been rapid expanded, so radio communication system has been widely
used. At the same time, higher requirements have been put forward on
the RF receiver system. The low noise amplifier (LNA) is the front
circuit of the RF receiving system, whose performance has a critical
influence on the entire system. Therefore, how to design a low noise
amplifier, which has a wide bandwidth, low noise, good input and output
matching, good stability, is becoming more and more important.
This paper mainly introduces the design principle and parameters of a
low noise amplifier. We will use ADS software to design two low noise
amplifiers and optimize their performance. A bipolar transistor AT41511
and a high electron mobility transistor ATF54143 have been chosen, and
the design frequency range is from 1950MHz to 2050MHz. After each design,
some stability optimization methods are presented. Through simulation,
the amplifier has achieved the anticipated target.
Keywords Low noise amplifier, ADS software, noise figure, input matching, stability.
目 录
1 绪论 1
1.1 低噪声放大器简介 1
1.2 低噪声放大器的发展历史及研究现状 2
1.3 本课题的主要工作及内容安排 3
2 低噪声放大器的理论基础 4
2.1 低噪声放大器的基本结构 4
2.2 低噪声放大器的主要指标 4
3 设计的前期准备工作 8
3.1 ADS 软件及设计流程简介 8
3.2 工作频段选择 8
4 使用双极性晶体管设计低噪声放大器 10
4.1 晶体管选择和设计指标的确定 10
4.2 晶体管参数扫描和偏置电路设计 11
4.3 输入输出匹配电路设计 17
4.4 整体电路的优化 22
4.5 最终版图的生成 25
5 使用高电子迁移率晶体管设计低噪声放大器 27
5.1 晶体管选择和设计指标的确定 27
5.2 晶体管直流扫描和偏置电路设计 28
5.3 输入输出匹配电路设计 31
5.4 整体电路的优化 33
5.5 最终版图的生成 35
6 级联低噪声放大器的实现 37
结论 40
致谢 41