低噪声放大器毕业设计_西电子科技大学.docVIP

摘要 随着通讯工业的飞速发展，人们对各种无线通讯工具的要求也越来越高，功率辐射小、作用距离远、覆盖范围大已成为各运营商乃至无线通讯设备制造商,的普遍追求，这就对系统的接收灵敏度提出了更高的要求 ，这就对处于接收机最前端的低噪声放大器提出更高的要求：低噪声，合适的增益，工作频段内的稳定性。 本文详细介绍用ADS设计微波低噪声小信号放大器。放大器增强型伪高电子迁移率晶体管(E-pHEMT)，频率范围在。本文Abstract With the rapid development of communications industries, there is a variety of wireless communication tools have become more sophisticated requirements, small power radiation, the role of distance, large-scale coveragehas become the largest operator of wireless communications equipment as well as manufacturers, the general pursuit of this sensitivity of the system to receive a higher demand, which on most front-end receiver in the low-noise amplifier to higher requirements: low-noise, the appropriate gain, the stability of working frequency band. This paper describes the use of ADS software design of microwave low-noise small-signal amplifier. Selection of Agilent Technologies?s ATF-54143 amplifier transistor (E-pHEMT), Work in which frequency range 2010MHz ~ 2025MHz. This article first analyzes the general low-noise amplifier of the basic structure and requirements of indicators and design principles. Re-ATF54143 transistors based on the preliminary design of matching networks, bias circuits, and methods to resolve the instability. Finally, ADS software simulation through good circuit design optimization and a good PCB circuit diagram drawn to complete the circuit design and circuit debug and test the actual circuit. Various test results show that low-noise amplifier performance. Key words: low-noise amplifier ATF54143 ADS simulation SMITH Chart impedance matching RF (microwave) 第一章 绪论 4 1.1 低噪声放大器 4 1.1.1 概念 4 1.1.2 主要功能 5 1.1.3 主要应用领域 5 1.2 低噪声放大器的研究现状 5 1.3 本文的主要研究成果和内容安排 7 第二章 低噪声放大器的分析与研究 8 2.1 低噪声放大器的基本结构 8 2.2 低噪声放大器的基本指标 8 2.2.1 噪声系数 9 2.2.2 增益 9 2.2.3 输入输出驻波比 10 2.2.3 反射系数 10 2.2.4 放大器的动态范围（IIP3） 10 2.3 低噪声放大器设计设计的基本原则 11 2.3.1 低噪声放大管的选择原则 11 2.3.2 输入输出匹配电路的设计原则 11 第三章 低噪声放大器的设计 14 3.1 放大器设计的主要流程 14 3.2 低噪声