摘要双工器是一种广泛应用于通信领域的三端口无源微波器件，其作用是将一路输入信号分为两路信号输出或将两路输入信号合并成一路信号输出。波导型双工器因其结构简单、易于实现而受到广泛关注。67770

该文主要围绕H面波导双工器的设计展开，在逐步分析了滤波器的原理与设计流程、T接头的匹配方式以及膜片的原理与应用等相关内容后，针对具体的课题内容，设计了一款中心频率为73.5GHz和83.5GHz的H面波导频带双工器。其中，滤波器部分采用半波长传输线作为微波谐振腔，T接头部分采用膜片与金属圆柱相结合的匹配方式。

此外，本课题主要借助HFSS软件与Visual C++软件，HFSS软件用于建模与仿真，Visual C++软件用于编程计算。

毕业论文关键词  波导双工器  滤波器  T接头

毕业设计说明书（论文）外文摘要

Title        H-Plane Waveguide Diplexer For 80GHz        

Abstract

The diplexer is a kind of three-port passive microwave devices which are widely used in communication field, and its role is to pide an input signal into two output signals or combine two input signals into one output. Waveguide diplexer received widespread attention because of its simple structure and  easy to realize. 

The paper focuses on the design of H-plane waveguide diplexer, after gradually analyzing the principle and design processes of filter, the matching method of T-connection,  the application of diaphragm and some other related content, according, a H-plane waveguide band diplexer design with center frequencies of 73.5GHz and 83.5GHz is designed in this paper. Among them, the filter part uses a half-wavelength transmission line as a microwave resonant cavity and adopts the shunt connection as a inverted converter, the T-joint part uses the combination of diaphragms and the metal cylinder as a way of matching. 

In addition, this topic mainly uses the softwares of HFSS and Visual C++, HFSS software is used for modeling and simulating, Visual C++ software is used for the programming and calculating.

with other softwares, it is decided that: Use software Flash to achieve figurativeness, and use Matlab for computing and designing GUI, and finally combine the two kinds of software, and ultimately achieve the expected requirements.

Keywords  waveguide diplexer  filter  T-joint  

目   次

1  引言 1

1．1  双工器的研究背景及发展历史 1

1．2  双工器的结构 2

1．3  本文的主要研究内容 3

2  微波滤波器理论及设计方法 3

2．1  滤波器的一般概念 3

2.1.1  工作特性 3

2.1.2  逼近函数 4

2．2  滤波器的设计与实现 5

2.2.1  低通原型滤波器 5

2.2.2  带通滤波器与低通原型滤波器的频率变换 6

2.2.3  倒置变换器 7

2.2.4  倒置变换器的微波实现