【2017年整理】微带线天线研究.doc

微带天线研究 摘要 通信系统的发展带来了天线行业的勃勃生机，在众多的天线类型中微带天线已成为当前研究的前沿之一，很具有研究前景与实用意义。特别是微带缝隙天线，以其重量轻、剖面薄、平面结构且易与载体共形，馈电网络可与天线结构一起制成等优点已经引起天线工作者的广泛关注。本文简要介绍了微带天线和微带缝隙天线的分类、分析方法、主要参数，然后提出了一种三角形缝隙微带天线。在介质基板的一面一个三角形缝隙，另一面采用一个等腰三角形微带线进行馈电。通过仿真给出了天线的s参数，VSWR和方向图。 关键词：天线参数，微带天线，微带缝隙天线，三角形缝隙微带天线设计 目录 一、绪论···································································· 3 1.1 简介······································································3 1.2 微带天线的发展····························································3 1.3 微带天线的特点···························································3 二、微带天线基本知识·························································4 2.1 微带天线的辐射机理························································4 2.2微带天线的分析方法························································4 2.3微带天线的主要电参数··························· ··························5 2.3.1 输入导纳·····························································5 2.3.2 辐射电阻和品质因数··················································5 2.3.3 带宽································································6 2.3.4 方向性系数、增益和天线效率··········································6 2.3.5 方向图······························································7 2.4 激励方法································································7 2.4.1 微带馈电····························································7 2.4.2 同轴线馈电··························································8 三、微带缝隙天线····························································8 3.1 矩形缝隙天线···························································9 3.1.1 输入阻抗··························································9 3.1.2 方向图····························································11 3.2 环形缝隙天线····························································11 3.3 锥形缝隙天线天线························································12 四、三角缝隙宽缝微带天线······················································13 4.1 天线设