摘要超宽带技术具有高速率、低成本等特点，是目前雷达通信等领域最具有前景的技术之一。作为雷达电磁波收发部件的超宽带天线一直是国内外天线研究领域的热点。本文主要比较了几种常用超宽带天线的性能，重点研究了指数渐变槽Vivaldi超宽带天线及其阵列，用电磁仿真软件HFSS13.0从天线结构、时域特性、频域特性对Vivaldi天线进行了分析和仿真，讨论了各部分参数对辐射性能的影响，提出了一种微带线—槽线宽频带馈电结构，实现了从不平衡到平衡的转换，并通过加载栅栏完善了天线结构。最后，介绍了阵列天线的基本理论，利用Vivaldi天线单元组成阵列，实现课题天线指标要求。66203

毕业论文关键词  超宽带；Vivaldi天线；HFSS13.0；阵列天线

Title         The  design  of  UWB  radar  antenna                  

Abstract

Because ultra-wideband technology has high-speed, low-cost and other excellent properties, it has become the most promising and competitive technology in radar, communications and other fields. As a radar wave transceiver components UWB antenna has been a hot research field in antenna abroad. This paper compares several typical structure of ultra-wideband antenna performance. Focuses on the exponential tapered slot Vivaldi UWB antenna and array, using the electromagnetic simulation software HFSS13.0 analysis the antenna structure, time domain characteristics, frequency domain characteristics. Discusses the various parts of the influence parameters on the radiation performance, proposed a micro strip line - slot line broadband feed structure, realized from unbalanced to balanced converter, and perfected by loading the fence antenna structure. Finally, it also describes the basic theory of the array antenna. The array of antenna was composed with Vivaldi elements, realized antenna index requirements.

Keywords  Ultra-wideband; Vivaldi antenna ; HFSS13.0; array antenna 

毕业设计说明书（论文）外文摘要 

目录

1 绪论 2

1.1 课题研究背景和意义 2

1.2 UWB天线发展历史及其在雷达中的作用 2

1.3 UWB天线研究现状和发展趋势 3

1.4 Ansoft_HFSS13.0软件介绍 4

1.5本文主要工作及安排 5

2 超宽带天线理论基础 6

2.1 UWB天线的基本特性 6

2.2 UWB天线主要性能参数 7

2.3 UWB天线分类与比较 10

3. Vivaldi天线单元设计及仿真 13

3.1 Vivaldi天线相关理论 13

3.2 Vivaldi天线单元结构设计 17

3.3 Vivaldi天线单元仿真分析结果 22

3.4渐变槽vivaldi天线改进 31

4. Vivaldi天线阵仿真结果分析 35

4.1 阵列天线基本理论 36

4.2一维Vivaldi天线阵设计与仿真 40

4.3 二维Vivaldi天线阵设计与仿真 42

结论 45

致谢 46

参考文献