基于耦合线加载的多传输零点高选择性宽带滤波器

摘要宽带带通滤波器作为现代无线通信的重要组件，其设计也被赋予了重要意义和价值。现代无线通信的迅猛发展使得频率资源日益紧张，而滤波器作为选频器件的一种,其性能的好坏对整个通信系统的通信质量有着重要影响。在宽带滤波器的设计中，除了满足带宽需求，还对低损耗、小型化、高抑制、高选择性等性能提出一定要求。本文主要研究基于耦合线加载的多传输零点的高选择性宽带带通滤波器。
首先对宽带滤波器的研究背景进行介绍，并介绍目前国内外的研究现状；
介绍一些理论知识：滤波器的原理、常见耦合线的特性、信号干扰技术原理；
.提出两种基于信号干扰技术的多零点的宽带带通滤波器。由短路分支线与耦合线组成的两条传输路径实现端口1到端口2信号传输。
关键词带通滤波器信号干扰技术短路分支线耦合线传输零点
毕业论文设计说明书外文摘要
Title   High selectivity wideband bandpass filter with multiple transmission
        zeros based on coupled transmission line with loaded stubs
Abstract
As an important component of modern wireless communication, the design of bandpass filter has been given importance and value. The modern wireless communication develops so rapidly that the frequency resources are increasingly strained. As a frequency selection component, the filter has an important impact on the communication quality of the communication system. In the design of bandpass filter, not only to meet the bandwidth demands, but also meet some certain performance requirements such as low-loss, small size, high rejection, high selectivity . In this paper, we introduce high selectivity wideband bandpass filter with multiple transmission zeros based on coupling transmission lines.
   Firstly, the history and the development of microwave filters are introduced briefly. The current research status in the word is given latter.
   Secondly, introduce some theoretical knowledge: the principle of filter, characteristics of some common coupled lines, sigal-interaction concepts.
   Thirdly, two novel high selectivity fifth-order wideband bandpass filters (BPFs) with multiple transmission zeros based on transversal signal-interaction concepts are proposed in this letter. Two transmission paths consist of a shorted stub and two open coupled lines are used to realize signal transmission from Port 1 to Port 2.
Keywords Bandpass filter, sigal-interaction concepts, short stub, coupled line, transmission zeros
目   次
   1 绪论 1
1.1 本课题的研究背景 1
1.2 国内外研究现状 1
1.3 论文的主要研究内容及框架 4
2 滤波器的基本理论和信号干扰技术理论6
2.1 滤波器基本理论6
2.2 常用耦合线的特性分析8
2.3 信号干扰技术理论12
2.4 小结 14
3 带外具有优尔个传输零点的宽带带通滤波器 16
3.1 引言 16
3.2 滤波器理想电路的设计与理论分析 16
3.3 滤波器结构模型的仿真与分析 16
3.4 小结   23
4 带外具有十个传输零点的宽带带通滤波器 25
4.1 引言 25
4.2 滤波器理想电路的设计与理论分析 25
4.3 滤波器结构模型的仿真与分析 27
4.4 小结 29
结论 30
致谢 31
参考文献32 基于耦合线加载的多传输零点高选择性宽带滤波器:http://www.youerw.com/tongxin/lunwen_23373.html