电磁散射中三维腔体的鲁棒积分公式
Robust integral formulations for electromagnetic scattering from three-dimensional cavities
AI总结:
本文提出一种新的鲁棒积分方程,用于求解嵌入无限完美导体半空间中的通用开放腔体的电磁散射问题,通过后处理步骤中的连续性方程实现低频下的稳定求解,并展示了高阶精度的Nystrom离散化方法。
摘要:
大型开放腔体结构的散射在多种电磁应用中具有重要意义。本文提出了一种新的良好条件的积分方程,用于求解嵌入无限完美导体半空间中的通用开放腔体的散射问题。该积分表示允许在后处理步骤中使用连续性方程稳定地求解电场和磁场,即使在低频情况下。我们建立了存在性和唯一性结果,并在旋转腔体情况下展示了该方案的性能。使用广义高斯求积的Nystrom离散化方法获得了高阶精度。
英文摘要:
Scattering from large, open cavity structures is of importance in a variety of electromagnetic applications. In this paper, we propose a new well conditioned integral equation for scattering from general open cavities embedded in an infinite, perfectly conducting half-space. The integral representation permits the stable evaluation of both the electric and magnetic field, even in the low-frequency regime, using the continuity equation in a post-processing step. We establish existence and uniqueness results, and demonstrate the performance of the scheme in the cavity-of-revolution case. High-order accuracy is obtained using a Nystrom discretization with generalized Gaussian quadratures.
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