现代通信系统混频器的设计和研究
关键词 混频器 AD8343 阻抗匹配 微带线 PCB
Title Design about the Mixer of Moderncommunication systems
Abstract
The 21st century is the era of information technology, With the development
of information technology, Communications technology has played an
increasingly important role in the modern society, As the core circuit of
superheterodyne receiver in the modern communication systems,a mixer’s
performance will directly affect the performance of the entire system. This
paper describes a design of mixer circuit based on the AD8343 chip. This
paper introduces the working principles of the mixer and the data
parameters of the chip in details, gives the detailed design process of
the mixer under 1GHz, including the simulation of S parameters as well as
input and output ports impedance match, finally achieved the practical
application via single-ended to differential conversion. In addition, This
paper also discusses the design of PCB circuit board in detail,take the
impedance of the microstrip line into consideration in order to reduce the
electromagnetic interference, designs the PCB board by Altuim Designer,
finally manufactured the board and debugged it.
Keywords Mixer AD8343 Impedance matching Microstrip line PCB
目次
1 绪论 1
1.1 研究背景及意义 1
1.2 本文研究的主要内容与成果1
1.3 本文内容安排2
2 系统概述3
2.1 引言 3
2.2 发射机概述 3
2.3 接收机概述 3
3 混频器原理 5
3.1 引言 5
3.2 混频器原理与分类 5
3.3 混频器的相关参数 6
3.4 混频器的应用8
4 混频器设计与阻抗匹配. 10
4.1 AD8343 芯片介绍. 10
4.2 混频器原理图设计 . 12
5 PCB 板的设计与调试 23
5.1 传输线阻抗匹配 . 23
5.2 原理图设计 . 25
5.3 PCB 板图设计 27
5.4 PCB 的制板与调试 31
结 论 37
致 谢 38
参 考 文 献. 39
1 绪论
1.1 研究背景及意义
近年来，伴随着信息化高速公路的快速建设，无线通信技术得以迅速发展，并越
来越广泛的应用于计算机，通信，微电子以及现代医疗设备等各个方面。当下电子信
息技术的不断发展与成熟，不仅使得我们越来越多地享有信息社会的快捷，甚至，上
升到国家层面，还会关系到国家的国防安全，只有掌握核心技术的国家和民族，才能
在未来激烈的信息化竞争中占据主导地位。对于核心技术的竞争，不但关系到知识积
累和人才的储备，更是对科技战略主导权的竞争， 掌握现代无线通信核心技术的国家，