Efficient calculation of interior scattering from cavities with partial IBC wall
ELECTRONICS LETTERS(2020)
摘要
The magnetic field integral equation based method of moments (MoM) with the Kirchhoff approximation can predict the interior scattering from cavities with impedance boundary condition (IBC) walls. However, if the IBC wall is a small part of the whole wall and is modified multiple times, the conventional MoM may be time-consuming due to the repeated and expensive lower-upper (LU) decompositions of impedance matrices. In this Letter, the Sherman-Morrison-Woodbury (SMW) formula is used to mitigate the problem. The authors only require to perform the LU decomposition of the cavity without IBC walls, and to efficiently obtain the solutions of the cavity with different IBC walls by reusing the LU decomposition and the SMW formula.
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关键词
electromagnetic wave scattering,method of moments,integral equations,magnetic field integral equations,electric field integral equations,matrix algebra,efficient calculation,interior scattering,Kirchhoff approximation,impedance boundary condition walls,IBC wall,conventional MoM,impedance matrices,Sherman-Morrison-Woodbury formula,LU decomposition,different IBC walls
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