低温低噪声放大器的设计与实现

发布时间：2018-03-15 01:08

本文选题：高温超导接收机　切入点：低温低噪声放大器　出处：《杭州电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来随着无线通信技术的快速发展,对通信接收系统的性能提出了更高的要求。高温超导接收机以其高灵敏度、高选择性成为当下研究的热点。在民用方面它可以有效扩大通信基站的覆盖能力和通信容量,增加抗干扰能力。在军用方面,性能优异的高温超导接收机具有极强的弱信号提取能力,可以改善接收系统的侦查接收能力。低温低噪声放大器作为高温超导接收前端的第一级有源器件,其噪声系数指标对接收机的灵敏度具有至关重要的影响。因此对于具有极低噪声系数的低温低噪声放大器的研究具有重要的现实意义。本文首先介绍了低噪声放大器(LNA)的发展历史与现状,继而详细的阐述了低噪声放大器的工作原理以及设计方法。随后利用高电子迁移率晶体管(p HEMT)设计实现了两款应用于高温超导接收前端的低温低噪声放大器,并给出了测试结果和性能分析。本文选用的低噪声放大器为安捷伦公司的p HETM管ATF-54143,首先利用射频仿真软件ADS对放大器的偏置电路、稳定性、输入输出匹配电路进行仿真设计。然后引入源级串联负反馈和并联阻性反馈结构,使得放大器在很宽的频带内稳定工作且具有良好的驻波与噪声性能。最后对仿真设计完成的电路进行制作加工。最后在液氮的温度下进行性能测试。测试结果表明所设计的两款LNA的性能指标满足了课题的要求。
[Abstract]:In recent years, with the rapid development of wireless communication technology, the performance of the communication receiving system has been put forward higher requirements. High selectivity has become the focus of current research. In the civilian aspect, it can effectively expand the coverage and communication capacity of the communication base station, increase the anti-jamming capability. The high temperature superconducting receiver with excellent performance has very strong weak signal extraction ability, which can improve the detection and reception ability of the receiving system. Low temperature low noise amplifier is the first stage active device of the high temperature superconducting receiving front end. The index of noise coefficient has a vital influence on the sensitivity of receiver. Therefore, it is of great practical significance to study the low temperature low noise amplifier with very low noise coefficient. This paper first introduces the low noise amplifier. The history and present situation of LNAs. Then, the working principle and design method of LNA are described in detail. Then, two low-temperature LNA used in HTS receiver front end are designed and implemented by using high electron mobility transistor pHEMT. The test results and performance analysis are also given. The low noise amplifier selected in this paper is the ATF-54143 of Agilent's p HETM transistor. Firstly, the bias circuit of the amplifier is stabilized by the radio frequency simulation software ADS. The input and output matching circuit is simulated and designed. Then the source level series negative feedback and the parallel resistive feedback structure are introduced. The amplifier works stably in a wide frequency band and has good standing wave and noise performance. Finally, the circuit designed by simulation is manufactured. Finally, the performance is tested at the temperature of liquid nitrogen. Ming designed two LNA performance indicators to meet the requirements of the subject.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722.3

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