Electromagnetic Time-Reversal for reverberation chamber applications using FDTD

I. El Baba, S. Lalléchère, P. Bonnet
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引用次数: 12

Abstract

This paper deals with the use of Time-Reversal (TR) method in electromagnetism and its applications in ElectroMagnetic Compatibility (EMC) in a reverberating environment. The proposed study leans on Mode Stirred Reverberation Chamber (MSRC) of the EMC team, LASMEA (LAboratoire des Sciences et Matériaux pour l'Électronique et d'Automatique, Clermont University), France. Based upon the equivalence between backward propagation and reversibility of the wave equation, many TR experiments were led successfully in acoustics [1]. In this paper, an original way of using TR in electromagnetics is detailed (principally concerning the ability of the technique to focus a signal in time and space). First, the theoretical principles of TR are described and illustrated using Finite Difference in Time Domain (FDTD, [2]) computing of Maxwell's equations. Then, the aim is to accurately describe the influence of various parameters (from FDTD numerical experiments) above focusing. Thus, particular interests rely on the numbers and locations of TR sensors, directivity of source, presence of scatterers, impact of MSRC. Finally, considering characteristics of EMC applications in MSRC, a closer look will be set to the advantages of TR numerical tools for innovating studies in reverberation chambers.
FDTD混响室应用的电磁时间反转
本文讨论了时间反转(TR)方法在电磁学中的应用及其在混响环境下电磁兼容(EMC)中的应用。拟议的研究依赖于EMC团队的模式搅拌混响室(MSRC), LASMEA(实验室des Sciences et mat riaux pour l'Électronique et d' automatique, Clermont大学),法国。基于波方程的反向传播和可逆性的等价性,在声学领域成功地进行了许多TR实验。本文详细介绍了在电磁学中使用TR的一种原始方法(主要是关于该技术在时间和空间上聚焦信号的能力)。首先,利用麦克斯韦方程组的时域有限差分(FDTD,[2])计算描述和说明了TR的理论原理。在此基础上,通过时域有限差分(FDTD)数值实验,准确描述各种参数对聚焦的影响。因此,特定的兴趣取决于TR传感器的数量和位置、源的指向性、散射体的存在、MSRC的影响。最后,结合MSRC中电磁兼容性应用的特点,详细介绍了TR数值工具在混响室创新研究中的优势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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