摘要随着通信技术的迅速发展，无线电设备也朝着小型化，便携化发展。人们发现微带定向耦合器就具有结构紧凑，易于制造和方便集成的特点，引起了人们的极大的研究兴趣，可以直接做在电路板上，占用空间小，容易和其它电路元件的特性相连接，所以用它做微波电路很合适。但是，微带定向耦合器，也有其自身的不足，主要是耦合度和方向性没有很优秀。为了克服这两个缺陷，研究人员找到了一些改进的措施，本文将用微波理论知识和ADS相结合，设计一种微带分支线定向耦合器来实现耦合和定向性能的改善和提高。文章从背景引起，介绍所设计的微带分支线定向耦合器的工作原理，利用ADS（先进设计系统）完成设计和仿真，详细说明了每一个设计步骤，对仿真结果进行了分析讨论。78448

毕业论文关键词  ADS 微带线  仿真 定向耦合器 

毕业设计说明书外文摘要

Title   The Design of Microstrip Directional Coupler Based on ADS 

Abstract With the rapid development of communication technology,radio devices also toward miniaturization and portable 。 People find microstrip directional coupler with compact structure, are easy to production and convenient integration features, has attracted great research interest, can be directly on the circuit board, small footprint, easy and other connected to the characteristics of the circuit element, so it is very suitable for microwave circuit。 Microstrip directional coupler, however, also has its own limitation, main coupling and no direction is very good。 In order to overcome these two defects, the researchers found some improvement measures, combining with the microwave theory knowledge and advertising, design a kind of directional coupler coupling microstrip branch line directional performance improvement and improve。 From the background, the working principle of mechanism design microstrip directional coupler branch line using advertising design system (advanced) to complete the design and simulation, each design steps are described in detail, the simulation results are discussed。

Keywords    ADS    microstrip line   simulation   coupler

目  录

1。  绪论 1

1。1  微波技术的历史背景及发展趋势 1

1。2  先进设计系统ADS的介绍 1

1。3  定向耦合概念  2

1。4  定向耦合器的用途 3

1。5  微带线的概念 3

1。6  微带线的损耗 4

1。7  特征参数 5

2。  工作原理 7

2。1  定向耦合器 7

2。2  基本技术指标 7

2。3  测量方法 9

2。4  各技术指标表示 9

2。5  本章小结 9

3。  设计步骤 10

3。1  创建工作空间，原理图操作平台 10

3。2  微带线的计算