An Approximation for Fresnel Function to Reduce Computation Time Based on DRTM

K. Uchida, J. Honda, Yuuki Kimura
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引用次数: 1

Abstract

This paper is concerned with an approximation for diffraction function composed of a complex type of Fresnel function. The diffraction function is often used when we analyze the electromagnetic diffraction problems by using the discrete ray tracing method (DRTM). In this paper we introduce an approximate expression for the diffraction function in the form of simplified polynomial series resulting in saving much computation time. Numerical examples are carried out for the well-known three diffraction problems, and it is shown that both the accurate and approximate solutions are in good agreement. It is also described that the computation time based on the proposed approximation is about 13% in comparison with the computation time based on the accurate formulation.
基于DRTM的减少计算时间的菲涅耳函数逼近
本文讨论了由复菲涅耳函数组成的衍射函数的近似。用离散射线追迹法(DRTM)分析电磁衍射问题时,经常使用衍射函数。本文以简化多项式级数的形式引入了衍射函数的近似表达式,大大节省了计算时间。对三个著名的衍射问题进行了数值算例,结果表明,精确解与近似解吻合较好。本文还描述了与基于精确公式的计算时间相比,基于所提近似的计算时间约为13%。
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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