摘要双工器是一种工作在两种不同工作频带且能保证各工作频带间互不干扰的三端口器件。它由发射通道滤波器和接收通道滤波器及连接部件组成。该文以W 波段滤波器和双工器的综合与设计为主,并研究了与之相关的理论和技术。所研究的毫米波双工器工作频率高,具有插入损耗小、回波损耗大以及收发隔离度高的特点。66662
首先,该文给出了传统Chebyshev滤波器的基本理论、频率变换和设计方法,作为该文的理论基础。继而根据设计指标,作者采用了并联电感膜片耦合的波导结构来实现Chebyshev带通滤波器。然后在计算出模型的各项设计尺寸之后,作者采用了成熟的电磁场分析软件Ansoft HFSS对模型进行仿真,仿真的结果表明了这种80GHz波导E面双工器的可实现性。
论文详细地论述了双工器的分析原理、设计步骤以及后处理优化过程。
毕业论文关键词 双工器 W波段 波导滤波器
毕业设计说明书(论文)外文摘要
Title E-Plane Waveguide Diplexer For WR-12 Band
Abstract
Diplexer is a three port device working in two different frequency band and can guarantee no mutual interference .It is consisted of transmitting channel filter , receiving filter and connecting parts. The design of the W-band filters and diplexers is studied in this thesis as well as the related theories and technologies .The diplexer is of high working frequency ,low insertion loss, big return loss and high transceiver isolation degree.
First of all ,given the basic theory of the traditional Chebyshev filter ,frequency transformation and design method ,as a theoretical basis of this article .Then ,according to the design of indicators,the author adopted parallel inductance diaphragm coupling waveguide structure to implement Chebyshev bandpass filter .And then after to calculate the value of all parameters, the author adopted the mature electromagnetic field analysis software Ansoft HFSS simulation of the model ,the simulation results prove the correctness of the model.
The design methods ,simulation process and post-processing optimization
process are described in detail in this paper.
Keywords diplexer W-band waveguide filter
目 次
1 绪论 1
1.1 引言 1
1.2 双工器的研究背景 1
1.3 双工器的发展现状 2
1.4 本文的主要工作 3
2 微波滤波器和双工器的理论概述 3
2.1 低通滤波器的一般概念 3
2.2 切比雪夫低通原型滤波器 5
2.3 带通滤波器与低通原型的频率变换 6
2.4 低通原型滤波器到耦合谐振腔带通滤波器的变换 8
2.5 倒置变换器的微波实现 9
2.6 带通滤波器的串联支路和并联支路的微波实现 11
2.7 双工器的三端接头 13
2.8 波导中的膜片 13
2.9 微波滤波器中的不连续性 14
2.10 微波滤波器的寄生通带问题 14
3 E面波导双工器的设计 15
3.1 E面波导双工器的项目指标