Volume integral equations for electromagnetic scattering in two dimensions

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• 作者：Martin Costabel ; ^{costabel@univ-rennes1.fr" class="auth_mail" title="E-mail the corresponding author} ; Eric Darrigrand ; Hamdi Sakly
• 关键词：Volume integral equation ; Electromagnetic scattering ; Double layer potential
• 刊名：Computers & Mathematics with Applications
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：70
• 期：8
• 页码：2087-2101
• 全文大小：419 K

文摘

We study the strongly singular volume integral equation that describes the scattering of time-harmonic electromagnetic waves by a penetrable obstacle. We consider the case of a cylindrical obstacle and fields invariant along the axis of the cylinder, which allows the reduction to two-dimensional problems. With this simplification, we can refine the analysis of the essential spectrum of the volume integral operator started in a previous paper (Costabel et al., 2012) and obtain results for non-smooth domains that were previously available only for smooth domains. It turns out that in the transverse electric (TE) case, the magnetic contrast has no influence on the Fredholm properties of the problem. As a byproduct of the choice that exists between a vectorial and a scalar volume integral equation, we discover new results about the symmetry of the spectrum of the double layer boundary integral operator on Lipschitz domains.