FDTD结合SVD研究混响室

发布时间：2018-01-08 10:21

本文关键词：FDTD结合SVD研究混响室　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：在电磁兼容技术中,混响室具有以下的突出优点:造价低廉并且场强度高。因此,近年来混响室已经迅速发展成为电磁兼容测试技术中一种不可或缺的测试场地,并且得到了深入的研究。本文首先介绍了混响室的研究背景和国内外对混响室的研究动态;然后介绍混响室的相关理论,包括矩形腔体理论、谐振模式。混响室的主要性能参数,包括混响室时间常数、混响室的过模谐振、品质因数、最低可用频率以及模式密度等等。接着阐述了混响室的三种搅拌方式以及混响室的评价标准和混响室的空腔校准的知识。论文第三部分介绍了本篇论文涉及到了电磁算法时域有限差分算法,以及数据后处理的算法矩阵奇异值分解。与此同时,也阐述了电磁仿真的知识以及其他的电磁算法,比如矩量法和有限元法,并且引入了傅里叶变换的知识。最后基于时域有限差分法对混响室腔体内各个部分进行建模与仿真,接着具体分析了各种情形下的电场分布。同时,论文把频域的图像变化到了频域和空间域,探讨了在不同的频率以及不同的搅拌器的搅拌角度下频域和空间域下的观察面上电场分布情况。本文的重点在于基于时域有限差分算法和矩阵奇异值分解算法对混响室建模仿真和性能分析。建模包含了腔体的建模,天线的建模和搅拌器的建模。通过在MATLAB平台上编制FDTD程序分析了混响室矩形腔体内各种情形下的电场分布情况。基于FDTD的电磁场仿真结果,采用SVD技术分析混响室内的电场以及分析了三个矩阵U、矩阵S和矩阵V的物理含义,并且提出了混响室腔体电场阶量的概念。
[Abstract]:In EMC technology, reverberation chamber has the following outstanding advantages: low cost and high field strength. In recent years, reverberation chamber has been rapidly developed as an indispensable test site in electromagnetic compatibility testing technology. Firstly, the background of reverberation chamber and the research trends of reverberation chamber at home and abroad are introduced. Then the related theories of reverberation chamber are introduced, including rectangular cavity theory, resonant mode, main performance parameters of reverberation chamber, including reverberation chamber time constant, reverberation chamber over-mode resonance, quality factor. The lowest available frequency and mode density, etc. Then, three kinds of mixing methods of reverberation chamber, the evaluation standard of reverberation chamber and the knowledge of cavity calibration of reverberation chamber are expounded. The third part of the paper introduces the three kinds of mixing methods of reverberation chamber and the knowledge of the cavity calibration of reverberation chamber. Electromagnetic algorithm. Finite-difference time-domain algorithm. At the same time, the knowledge of electromagnetic simulation and other electromagnetic algorithms, such as moment method and finite element method, are also described. Finally, based on the finite difference time-domain (FDTD) method, modeling and simulation of each part of reverberation chamber is carried out, and then the electric field distribution under various circumstances is analyzed concretely. In this paper, the image in frequency domain is changed to frequency domain and space domain. The electric field distribution in frequency domain and space domain at different frequency and agitator angles is discussed. The emphasis of this paper is based on the finite difference time domain (FDTD) algorithm and matrix singular value decomposition (SVD) algorithm. Reverberation chamber modeling and performance analysis. Modeling includes cavity modeling. The modeling of antenna and agitator. The electric field distribution in the rectangular cavity of reverberation chamber is analyzed by making FDTD program on MATLAB platform. Simulation of electromagnetic Field based on FDTD. Fruit. The SVD technique is used to analyze the electric field in reverberation chamber and the physical meaning of three matrices U, matrix S and matrix V are analyzed, and the concept of electric field level of reverberation chamber cavity is put forward.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN03

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