摘要在多数通信系统中，微波、毫米波滤波器是信道选择和信号分离的重要器件,它的电气性能对于整个系统至关重要。滤波器要求同时满足低插入损耗、高回波损耗和高频率选择斜率性能要求。而且，这样的滤波器还应是结构紧凑的和免调试的。68596

    首先本文分析了折叠E面滤波器，在其结构中引入源端负载端耦合或标准交叉耦合会产生有限频率的传输零点的。基于E面和脊波导技术的滤波器具有高频率选择斜率的准椭圆函数特性，这种滤波器比传统的E面滤波器结构短小紧凑。这种滤波器能通过电铸方法制造，具有准确性和可重复性。

    接着分析了新颖的、低成本、高性能直耦E面滤波器和膜片耦合滤波器。这种利用多模腔的设计也具有准椭圆传输函数特性。这种滤波器在同一个滤波器中同时使用源端负载端耦合和多模腔融合技术，使滤波器的频率选择斜率和阻带性能得到改善。

毕业论文关键词  微波毫米波，波导滤波器

毕业设计说明书（论文）外文摘要

Title  Millimeter-wave waveguide filter design                                         

Abstract

In most communication systems, microwave,millimeter-wave filter device is an important channel selection and signal separation,it is essential for the performance of the entire electrical system.Filter requirements while meeting the low insertion loss, high return loss and high frequency selection slope performance requirements.Moreover,such filters should be compact and free debugging.

First,this paper analyzes the folded E-plane filter,introduced in its structure,the source terminal coupled to the load or the standard cross-coupling will produce a limited frequency transmission zero.Based on characteristics of quasi-elliptic function E and ridge waveguide technology with high frequency selection filter slope, this filter than conventional E-plane short and compact filter structure.This filter is manufactured by the electroforming method,with accuracy and repeatability.

Then analyzes the novel,low-cost,high-performance direct coupled E-plane coupling membrane filters and filter.This use of multi-cavity design also has a quasi-elliptic transfer function characteristic.This filter is used in the same filter while the source and the load terminal coupled to a multi-cavity fusion,and the slope of the frequency selection filter stop band performance is improved.

Keywords microwave and millimeter wave,waveguide filters

目   次

一、绪论…………………………………………………………………………1

1.1本课题研究背景……………………………………………………………1

1.2 研究历史与现状……………………………………………………………2

1.3本文主要研究内容…………………………………………………………3