基于光束追踪的高频渐近算法及其应用

发布时间：2018-03-20 21:52

本文选题：高频渐近算法　切入点：弹跳射线技术　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：高频渐近方法(High Frequency Asymptotical Method, HFAM)是计算电磁学领域的重要研究内容之一,在电磁工程领域具有重要理论意义和应用价值。本文依托于HFAM中最重要的弹跳射线(Shooting and Bouncing Ray, SBR)算法,针对其路径追踪技术的改进问题开展了具体研究,并将成果应用于多个工程领域。本文的主要贡献包括：1.从理论方法入手,详细介绍了传统基于射线追踪的SBR算法(SBR Based on Ray Tracing, RT-SBR)及其实现方案,包括光线追踪算法(Ray Tracing, RT)、几何光学理论(geometry optics theory, GO)和物理光学理论(physical optics theory, PO)。在此基础上,引入传统RT-SBR算法的改进算法——基于光束追踪的SBR算法(SBR Based on Beam Tracing, BT-SBR),阐述了实现该算法的各个重要环节,并与传统RT-SBR算法进行比较,从理论上证明了改进算法在精度和效率上的优势,再辅以多个算例验证。2.着重研究了BT-SBR算法在电磁工程领域的重要应用,包括复杂目标的隐身设计和复杂环境下目标的逆合成孔径雷达(Inverse Synthetic Aperture Radar, ISAR)成像。通过对BT-SBR算法功能的进一步拓展,实现了复合材质的BT-SBR算法,并将其应用于穿墙雷达的成像仿真。同时,也实现了基于方向图激励的BT-SBR算法,用于解决天线、天线阵及其支撑件的一体化仿真问题。在详述算法及其电磁模型的同时,本文也给出了多个算例以展示算法的有效性。最后,在总结全文的理论内容和研究成果的基础上,结合已完成的工作,对今后算法的进一步完善进行了简要阐述。
[Abstract]:High Frequency Asymptotical method (HFAM) is one of the most important research contents in the field of computational electromagnetics and has important theoretical significance and application value in electromagnetic engineering. This paper relies on the most important shooting and Bouncing ray (SBRs) algorithm in HFAM. In this paper, the improvement of the path tracing technology is studied, and the results are applied to many engineering fields. The main contributions of this paper include: 1. Starting with the theory and method, This paper introduces the traditional SBR algorithm based on ray tracing, SBR Based on Ray tracing (RT-SBR) and its implementation scheme, including ray tracing algorithm, RTR, geometry optics theory and physical optics theory. This paper introduces the improved algorithm of traditional RT-SBR algorithm, SBR algorithm based on beam tracing, Based on Beam tracing (BT-SBR), describes the important links to realize this algorithm, and compares it with the traditional RT-SBR algorithm. The advantage of the improved algorithm in accuracy and efficiency is proved theoretically, and then verified by several examples. The important application of BT-SBR algorithm in electromagnetic engineering is studied emphatically. It includes the stealth design of complex target and inverse Synthetic Aperture radar (Isar) imaging of target in complex environment. Through the further expansion of the function of BT-SBR algorithm, the BT-SBR algorithm of composite material is realized. At the same time, the BT-SBR algorithm based on pattern excitation is implemented to solve the integrated simulation problem of antenna, antenna array and its support. At the same time, the algorithm and its electromagnetic model are described in detail. Finally, on the basis of summarizing the theoretical content and research results of the full text, combined with the completed work, the further improvement of the algorithm in the future is briefly described.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O441

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