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Diffraction of creeping waves by conical points

机译:锥形点蔓延波的衍射

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We briefly review out recent results on evaluation of the diffracted wave for electromagnetic creeping waves scattered by a conical point at a perfectly conducting surface. The theory uses matched asymptotic expansions and the reciprocity principle, and reduces the problem to the need to evaluate the "canonical" conical diffraction coefficients at the boundary. The latter is a special case of the theory developed and implemented by us before. Additional technical difficulty comes from the need to evaluate the diffraction coefficients at the boundary which within the application of our "spherical" boundary integral equation method leads to the need to evaluate appropriate singular integrals. The latter was resolved using the discrete Fourier Transform and the whole strategy has been implemented numerically. We report sample numerical results demonstrating convergence of the algorithm.
机译:我们简要介绍了最近的结果,用于评估通过在完美导电的表面处散射的电磁爬行波的衍射波的评估。该理论使用匹配的渐近扩展和互惠原理,并减少了评估边界处“规范”锥形衍射系数的需要。后者是我们之前开发和实施的理论的特殊情况。额外的技术难度来自需要评估边界处的衍射系数,其“球形”边界积分方程方法的应用导致需要评估适当的奇异积分。后者使用离散的傅里叶变换解决,整个策略已经在数字上实施。我们报告了示例数值结果,证明了算法的收敛性。

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