摘要随着无线通信技术的迅猛发展，各种新型无线通信系统的不断涌现，极大地刺激了微博有源和无源器件的快速发展，也对滤波器的性能提出了更高的要求。

在微波滤波器的设计阶段,由于使用商用电磁软件进行优化所耗费的时间成本巨大,滤波器的整体仿真优化是一个十分繁杂的过程,空间映射方法正是针对商用电磁软件优化耗时这一缺点提出的。本文的工作放在空间映射法在滤波器设计中的应用上,给出了平行耦合微带滤波器的设计实例,这些方法对工程应用有一定的借鉴意义。63689

本文共分为三章,第一章主要介绍了课题背景,选题意义以及本文的主要工作。在第二章中主要介绍了空间映射方法,给出了它们的算法流程。第三章主要讨论的是平行耦合微带滤波器设计的实例，阐述空间映射方法在滤波器设计中的应用，证明了该设计方法的有效性。

毕业论文关键词：滤波器  空间映射  参数提取  平行耦合  优化

毕业设计说明书（论文）外文摘要

Title  Design of Parallel-Coupled Microstrip Filters Based on Space-Mapping Framework

Abstract With the rapid development of wireless communication technology, various new wireless communication system emerged, which stimulated rapid development of microwave active and passive components, also put filter performance forward higher request.

In the design stage of the microwave filters, due to the optimization by using the commercial EM(electromagnetic)simulator which takes a huge amount of time, the simulation and optimization of the filter is a very complex process. The method of space-mapping is just proposed to fix the defect of the optimization by using the EM simulator.

In this paper, a lot of work in the application of the method of space-mapping in filter design has been done by giving a detailed design example of parallel-coupled microstrip filter. These methods can be seen as a reference for the engineering application.

This Paper is pided into four chapters, the first chapter mainly introduces the background and meaning of the design method and the main work of this paper. In the second chapter, this paper introduces the space-mapping method and gives its algorithm flow. The third chapter explains space-mapping method in filter design application by giving a parallel-coupled microstrip filter design example and proves the effectiveness of the design method. The last chapter summarizes the work of this paper and proposed prospects of future’s work. 

Keywords filter space-mapping parameter-extraction parallel-coupled  optimization

 目   录

1  绪论 1

1.1  研究背景及意义 1

1.2  空间映射方法的提出和研究现状 1

1.3 本文主要工作 2

2  空间映射算法理论 3

2.1  空间映射优化思想及其数学表达 3

2.2  主动空间映射算法介绍 5

3  空间映射法优化平行耦合微带线滤波器实例 8

3.1  计算粗糙模型最优解 8

3.1.1  平行耦合微带线滤波器设计原理 8

3.1.2  设计指标 9

3.1.3  粗糙模型的建立 9

3.2  获取精确模型响应 16

3.3  精细模型响应的参数提取