有限元区域分解技术分析阵列天线辐射特性
本文首先介绍了有限元区域分解法的基本理论；然后运用有限元区域分解法分析了具有周期结构的微带阵列天线；接着分别分析了微带阵列天线，矩形波导阵列天线以及波导宽边缝隙天线阵。通过对比以上三种天线阵元和天线阵列的辐射方向图，可以很明显地发现阵列天线较之阵元单元能获得更好的增益及方向性。
关键词 计算电磁学 有限元区域分解 阵列天线 辐射特性
毕业论文设计说明书（论文）外文摘要
Title Analyzing the radiation pattern of antenna array by
Finite Element Domain Decomposition Method
Abstract
As an efficient numerical method, Finite Element Method stands out in a variety of numerical methods with its powerful fitting of various electromagnetic structure and superiority in analyzing complex medium electromagnetic problems. However, If the area has large size, such as the antenna array referred in the paper, the quantity of the unknowns will dramatically increase, resulting in a sharp increase in memory consumption and slow down in solving equations. In order to solve this problem, the Domain Decomposition Method was introduced in the paper, which has the "pide and conquer" mentality. The Domain Decomposition Method will break down the target area into a number of non-overlapping sub-regions to solve, and then re-join them together by impose a particular boundary condition to the surface of the sub-region. This method overcomes the shortcomings of the Finite Element Method in dealing with large-scale problems due to excessive memory consumption.
This paper firstly described the basic theory of the Finite Element Domain Decomposition Method. Then use Finite Element Domain Decomposition Method to analyze periodic Microstrip antenna array, rectangular waveguide array and broadside waveguide slot array. By comparing these three antenna unit’s radiation pattern with array’s, it is obvious that the array get better gain and directivity.
Keywords Computational electromagnetics Finite Elemen Domain Decomposition antenna array radiation pattern
目 次
1 绪论 1
1.1 研究背景 1
1.2 研究历史和现状 2
1.3 本文的内容安排 3
2 有限元区域分解法分析天线阵列的辐射特性 4
2.1 引言 4
2.2 有限元区域分解法基本原理 4
2.3 有限元区域分解法分析具有周期结构的微带阵列天线 6
2.5 本章小结 8
3 微带阵列天线特性分析 9
3.1 概述 9
3.2 设计指标和天线几何结构参数计算 9
3.3 微带天线阵元 11
3.4 微带天线阵列 17
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