Robust integral formulations for electromagnetic scattering from three-dimensional cavities

JOURNAL OF COMPUTATIONAL PHYSICS

卷:345

Article

Lai, Jun¹  Greengard, Leslie^2,3  O'Neil, Michael^2,4 

[1] Zhejiang Univ, Sch Math Sci, Hangzhou, Zhejiang, Peoples R China

[2] NYU, Courant Inst, New York, NY 10003 USA

[3] Simons Fdn, Simons Ctr Data Anal, New York, NY USA

[4] NYU, Tandon Sch Engn, New York, NY 10003 USA

关键词: Electromagnetic;    Cavity scattering;    Maxwell;    Integral equation;    Axisymmetric;   

DOI  :  10.1016/j.jcp.2017.05.008

来源: Elsevier

【 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. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free