摘要随着信息时代的不断发展以及人们通信需求的不断增加，作为通信依托的频率资源被深入地开发利用,不同通信技术间的频率间隔也越来越小，为了防止不同通信技术间的信号干扰，对高性能滤波器的研究逐渐成为国内外通信技术研究的重点。本文主要设计实现了一个X波段发卡式带通滤波器，其主要性能指标为：工作频率8~9GHz，带内插损小于3dB，带外抑制大于60dB。主要采用原型滤波器设计法，即以低通滤波器为原型，通过频率变换确定带通元件参数，然后通过辅助软件的计算以及ADS软件的仿真优化。最终完成符合技术指标的滤波器的设计。67187

毕业论文关键词  X波段 带通滤波器  ADS   

毕业设计说明书（论文）外文摘要

Title  X-band  hairpin  band-pass  filter  design

Abstract

With the development of information and the communication needs of people increasing, frequency resources as communication relies on is in-depth development and utilization, The frequency interval between different communication technology is more and more small,in order to prevent the interference between different communication technologies, the study of high performance filter gradually become the focus of research in communication technology in the world.This paper designs and implements a X band hairpin bandpass filter, the main performance is: the frequency of 8~9GHz, in-band insertion loss is less than 3dB, the out-of-band rejection is greater than 60dB. Mainly uses the prototype filter design method, namely the low-pass filter prototype, through frequency conversion to determine bandpass component parameters, and then through the CAD software and simulation and optimization of ADS software. Finally completed the design meet the technical index of the filter.

Keywords: X-band   bandpass filter   ADS   

目  录

1绪论 1

1.1 研究背景 1

1.2 滤波器的发展 1

1.3 本文结构介绍 2

1.4 本章小结 2

2滤波器基础理论 3

2.1滤波与滤波器 3

2.2滤波器的分类 3

2.3滤波器的主要技术指标 4

2.4本章小结 6

3微波滤波器 7

3.1微波滤波器概述 7

3.2微波滤波器与普通滤波器 7

3.3微波的特性与应用 8

3.4微波滤波器的逼近函数 9

3.5微波滤波器的实现形式 9

3.6本章小结 10

4微带线滤波器 11

4.1微带线滤波器概述 11

4.2微带线 11

4.3 微带线的耦合方式 19

4.4本章小结 20

5微带发卡式带通滤波器的设计与仿真 21

5.1设计流程图 21

5.2低通原型的确定 22

5.3微带参数的确定 23

5.4仿真及优化