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首页> 外文期刊>Applied Computational Electromagnetics Society journal >A New Iterative Method to Compute the Higher Order Contributions to the Scattered Field by Complex Structures
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A New Iterative Method to Compute the Higher Order Contributions to the Scattered Field by Complex Structures

机译：计算复杂结构对散射场的高阶贡献的一种新的迭代方法

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摘要

A method to compute the higher order contributions to the scattered field by complex structures is presented in this paper. The method is based on a new interpolation technique to represent the induced current with a very low amount of sample points and computational cost. The amplitude and phase of the current are represented separately. Both are defined by an interpolating function, which is built using Bezier surfaces. These functions provide the amplitude and the phase at any given point of the scattering surface in an easy way. The higher order contributions to the scattered field are obtained by using a new iterative method based on Physical Optics (PO) and the Stationary Phase Method (SPM) to compute the integral. The proposed method takes advantage of the saving in computation cost offered by the new representation of the currents reducing the order of the function which is necessary to minimize, in order to obtain the stationary phase points required to evaluate the PO integral. The results obtained show that the method is both efficient and accurate.
机译：提出了一种计算复杂结构对散射场的高阶贡献的方法。该方法基于一种新的内插技术，以非常少的采样点和计算成本来表示感应电流。电流的幅度和相位分别表示。两者均由使用Bezier曲面构建的插值函数定义。这些功能以简单的方式在散射表面的任何给定点提供幅度和相位。通过使用一种新的基于物理光学（PO）的迭代方法和固定相位方法（SPM）来计算积分，可以获得对散射场的高阶贡献。所提出的方法利用了由电流的新表示所提供的节省计算成本的优势，从而减小了必须最小化的函数阶数，以便获得评估PO积分所需的固定相点。所得结果表明，该方法高效，准确。

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