L波段正交调制接收机系统分析与设计
毕业论文关键词 接收机 混频器 电磁兼容 端口匹配
Wireless communications is currently the most widely used and fastest growing means of communication, and the receiver is a wireless communication system is the most important part. Modern receiver tends to be more on the design and implementation of high-performance, highly integrated direction. To improve the integration of the receiver, the key is to improve the receiver analog front-end integration. In this paper, superheterodyne receiver architecture, the use of modular design with balanced quadrature demodulation method, a receiver system analysis and design. First, the overall receiver performance analysis calculated and discussed each module design. Then, in particular on the RF front-end circuit electromagnetic compatibility problems have been studied and proposed to eliminate the problem of electromagnetic compatibility of specific measures. Finally, focusing on the RF port of the S-parameter matching analysis, and the use of ADS software port of the RF circuit emulation port matching to achieve maximum power transfer.
Keywords receiver mixer electromagnetic compatibility port match
目次
1绪论1
1.1研究背景1
1.2本文研究的主要内容及成果1
1.3本文内容安排2
2接收机整体性能分析与systemview仿真3
2.1引言3
2.2接收机系统概述3
2.3接收机系统指标分析4
2.3.1接收机性能指标概述4
2.3.2接收机系统主要性能指标分析4
2.3.3整体指标要求及所用芯片9
2.3.4对本系统进行计算分析10
2.4接收机系统的Systemview仿真11
2.4.1Systemview仿真软件简介11
2.4.2系统模型的建立12
2.4.3系统级仿真结果13
3接收机各模块设计15
3.1引言15
3.2低噪声放大器模块设计15
3.2.1设计思路简介15
3.2.2芯片RF3261概述16
3.3混频器模块设计16
3.3.1混频器的基本原理及主要参数17
3.3.2AD8343芯片概述17
3.4本地振荡器模块设计18
3.4.1引言18
3.4.2锁相芯片ADF4360-7简介18
3.5中频滤波与放大模块设计19
3.6解调与自动增益控制模块设计19
3.6.1引言19
3.6.2正交解调原理19
3.6.3AD8348概述20
3.6.4AD8362概述20
3.6.5AGC功能的实现方法21
3.6.6硬件设计21
4电磁兼容（EMC）介绍及设计规则22
4.1电磁兼容中常用定义22
4.1.1电磁兼容22
4.1.2电磁干扰23
4.1.3电磁敏感度23
4.2PCB射频能量的产生与传输线概述23
4.2.1PCB中射频能量的产生23
4.2.2传输线概述24
4.3影响印制电路板级电磁兼容的因素26
4.3.1布局不当26
4.3.2布线不当26
4.3.3器件边沿速率27
4.3.4高频电流27