帮忙翻译一篇摘要,急求……自1873年麦克斯韦(Maxwell)建立了电磁场基本方程以来,电磁波理论得到了迅速的发展.目前,电磁波的研究已深入到各个领域,应用十分广泛,如天线电波传播、光纤通信

Question

帮忙翻译一篇摘要,急求……
自1873年麦克斯韦(Maxwell)建立了电磁场基本方程以来,电磁波理论得到了迅速的发展.目前,电磁波的研究已深入到各个领域,应用十分广泛,如天线电波传播、光纤通信和移动通信、雷达技术、微波、电磁成像等等.电磁波在实际环境中的传播过程十分复杂,例如各种复杂目标的散射、复杂结构天线的辐射、在波导和微带结构中的传播等等.随着电子计算机技术的飞速发展,大量的电磁场的数值计算方法不断涌现,并得到广泛地应用.电磁场数学模型的分析实际就是求解Maxwell方程组,由于Maxwell方程组是一组微分方程或积分方程,电磁场的主要数值分析方法分为基于空间离散化的微分方程方法和基于散射体表面或内部离散化的积分方程方法两大类.时域有限差分法(FDTD)属于微分方程法,时域有限差分法具有简单、结果直观、网格剖分简单等优点.近些年FDTD的发展十分迅速,在许多方面均有重要应用,包括天线设计、微波电路设计、电磁兼容分析、电磁散射计算、光子学应用等等.
本文首先给出了电磁场计算方法的概述,然后分析了FDTD算法的基本原理算法的基本原理,依次给出了一维、二维和三维的电磁波传播模拟的matlab语言编程的步骤和应注意的问题,并分析了它们仿真结果,最后得出用matlab语言对基于FDTD算法的电磁波传播模拟编程的一些结论.

Answer 1

Since 1873 Maxwell (Maxwell) built since the basic equations of electromagnetic field theory, electromagnetic waves obtained a rapid development. At present, the research into the electromagnetic fields, already used widely, such as the antenna radio waves propagation, optical fiber communication and mobile communications, radar technology, microwave and electromagnetic imaging, etc. Electromagnetic wave propagation in the actual environment is very complex, such as all kinds of complicated target scattering, complex structure in the radiation, the antenna waveguide and microstrip structure of transmission, etc. With the rapid development of the computer technology, a large amount of numerical calculation method of the electromagnetic fields are constantly emerging, and get widely. Electromagnetic field of mathematical model is solving actual analysis, due to Maxwell equations, Maxwell equations is a set of differential equation or integral equation, electromagnetic field main numerical analysis method based on spatial discretization into the differential equation method and based on the surface or internal scattering body discretization integral equation method two kinds big. FDTD method was) belong to the differential equation method, finite difference time domain method is simple, intuitive and mesh dissection results of simple, etc. In recent years the FDTD is developing very rapidly, and in many ways are important application, including antenna design, microwave circuit design, emc analysis, electromagnetic scattering calculation, photonics, application, etc.
This paper firstly gives an overview of the electromagnetic field calculation method, then analyzed the basic principle algorithm FDTD algorithm are given, the basic principle of one-dimensional, in turn 2d and 3d electromagnetic wave propagation simulation by matlab language programming steps and problems should be paid attention to, and analyzed their simulation results with matlab language, finally come to the electromagnetic wave propagation FDTD algorithm based on simulated programming, some conclusions.