-
摘要近些年来，无线通信技术的发展备受瞩目， 阵列天线已经被广泛地运用到移动 、 无线 、 卫星以及雷达通讯系统中 ， 如何设计出满足性能指标要求的天线阵列成为摆在面前的迫切需要解决的一项重要课题 。 计算机数值仿真作为天线设计理论分析的一门重要技术被广泛研究 。 有限元方法由于其强大的几何模拟能力 ， 复杂环境适应能力成为计算机数值仿真技术中主流算法之一。本文研究了有限元方法的基本步骤及原理 ， 采用完全匹配层作为截断边界条件分析天线辐射问题 。 阵列天线辐射通常为电大尺寸仿真问题 ， 对计算机硬件要求较高 ， 针对此问题 ， 本文研究了有限元区域分解法分析大规模周期结构的微带阵列天线 ， 将整个区域分解为多个小区域 ， 对每个小区域单独处理 ， 我们只需由九个典型的基本子域通过区域扩展方式来模拟 ， 简化建模同时节省计算资源 。 文章通过数值算例验证了有限元方法在分析天线辐射问题的正确性及分析周期结构阵列天线的优势。59994
- 上一篇：铁氧体微波器件的时域谱元法研究
- 下一篇：基于GaN HEMT的功率放大器设计
毕业论文关键词 ： 有限元方法，完全匹配层，区域分解法，有限元撕裂对接法，阵列天线
Abstract Abstract Abstract AbstractIn recent years, the development of wireless communication technology has attractedworldwide attention, and antenna arrays as a research focus have been widely used to the asthe wireless communication system. T he designing of antenna array which meet theperformance requirement has been an important issue in recent study. Computer s imulation asan antenna design of an important theoretical analysis technology has been widely studied.Finite element method becomes one of the mainstream algorithms in c omputer s imulation forits powerful geometric simulation ability and complex environment applicability.In this thesis, we study the basic steps of the finite element method and we analysis theradiation problem of antenna with the finite element system using perfectly matched layerboundary condition. Array antenna radiation is usually electrically large simulation problemswhich need the high requirements of computer hardware. To solve this problem, we study thefinite element domain decomposition method to analysis microstrip antenna array which hasperiodic structure. The large region is separated into several small regions, each region iscomputed separately. For the microstrip antenna arrays arranged in a planar array, only ninebasic sub-domains are needed to compute by regional expansion. Therefore the modeling issimplified, and the computing resources can be saved significantly. Numerical results of theexamples are presented to demonstrate the accuracy and efficiency of the finite elementmethod in the analysis of antenna radiation, and it also shows that DDM method has a goodadvantage of solving the periodic structure antenna array.
Key Key Key Key word: word: word: word: F inite element metho d , P erfect matched layer , D omain decomposition metho d ,F inite element tearing and interconnecting , A ntenna array
目录
摘要........IIII
ABSTRACTABSTRACTABSTRACTABSTRACT....IIIIIIII
目录....IIIIIIIIIIII
1111绪论........1111
1.1研究的背景和意义.1
1.2研究的历史和现状.2
1.3本文内容安排2
2222有限元方法4444
2.1概述.4
2.2有限元基本步骤..4
2.3有限元基本原理..6
2.4有限元开域问题边界条件.8
3333天线辐射问题区域分解法分析........12121212
3.1概述..12
3.2区域分解法基本原理.12
3.2.1区域分解法特点.12
3.2.2区域分解法原理.13
3.3区域分解法分析周期性阵列问题..17
3.3.1周期问题基本子域17
3.3.2周期问题计算复杂度分析..18
3.4天线辐射问题有限元区域分解分析.20