微波双频带通滤波器的仿真设计

毕业设计

题目微波双频带通滤波器的仿真设计

学生姓名高宇洋学号 **********所在学院物理与电信工程学院

专业班级电子1201班

指导教师贾建科

完成地点物电学院实验室

2016 年 06 月 5 日

微波双频带通滤波器的仿真设计

作者：高宇洋

（陕西理工学院物理与电信工程学院电子信息工程专业 12级1班陕西汉中 723000）

指导教师：贾建科

[摘要] 为了满足无线通信向着多频段、多模式方向发展的需要，并简化多频段通信系统的结构，减小其体积和重量，降低生产成本，对多通带微波滤波器的研究及设计有重要的意义。基于此提出了一种双频带通滤波器的设计。该设计首先运用分立元件通过两次频率变换由一个低通原型滤波器变换成为双频带通滤波器，以此来验证双频带通滤波器的可行性。然后通过电路转换，引入导纳倒置变换器，将电路简化成为只有导纳倒置变换器和串联LC谐振器的双频带通滤波器。最后通过引入λ/4微带开路线将双频带通滤波器转换成为微波双频带通滤波器，并利用ADS (Advanced Design system) 软件对滤波器进行仿真，仿真结果表明达到设计指标要求。

[关键词]：双频滤波器；频率转换；导纳倒置变换；微带线

The simulation of microwave dual-band bandpass

filter design

Author: Gao Yuyang

(Grade 12,Class 1，Major of Electronic and Information Engineering，School of Physics and Telecommunication Engineering，Shaanxi University of Technology, Hanzhong 723000,Shaanxi)

Tutor: Jia Jianke

Abstract：I n order to meet the wireless communication to the needs of the development of multiband, multimode direction, and simplify the structure of multiband communication system, reduce the volume and weight, reduce production cost, to research and design of microwave bandpass filter has an important significance.Based on this proposed a dual-band bandpass filter design.First, the design applies discrete component by twice frequency conversion by a low-pass prototype filter transformation become the dual-band bandpass filter, in order to verify the feasibility of the dual-band bandpass filter. And then through the circuit transformation, the introduction of admittance inversion converter, to simplify the circuit become only admittance inversion converter and series LC resonator dual-band bandpass filter. Finally, by introducing the λ / 4 microstrip line into dual-band bandpass filter microwave dual-band bandpass filter, and by using ADS (Advanced Design system) software, the simulation was carried out on the filter, the simulation results show that meet the requirements of design index.

Keywords：Dual-band filter Frequency conversion Admittance inverted transform Microstrip line

目录

1引言 (1)

2 微波滤波器基本原理 (3)

2.1 滤波器简介 (3)

2.2 滤波器的基本类型 (3)

2.2.1 巴特沃士滤波器 (3)

2.2.2 切比雪夫滤波器 (4)

2.2.3 椭圆函数滤波器 (5)

2.3 频率变换 (5)

2.3.1 低通滤波器与低通原型的变换 (6)

2.3.2 高通滤波器与低通原型的变换 (7)

2.3.3 带通滤波器与低通原型的变换 (7)

2.3.4 带阻滤波器与低通原型的转换 (8)

2.4倒置变换器和变形低通原型 (9)

2.4.1倒置变换器和变形低通原型 (9)

2.4.2 倒置变换器的实现 (12)

3 设计方案 (13)

3.1两次频率变换设计 (13)

3.2 电路变换 (15)

4设计实例 (20)

4.1 集总参数元件设计 (20)

4.2微带线设计仿真 (22)