Surface Integral Equation Method for Soft-and-Hard/DB Boundary Condition

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-05
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
2790-2797
Series
IEEE Transactions on Antennas and Propagation, Volume 69, issue 5
Abstract
A surface integral equation (SIE) method is developed to analyze electromagnetic scattering by 3-D objects with soft-and-hard/DB (SHDB) boundary conditions. The SHDB boundary condition is a generalization of the soft-and-hard (SH) and DB boundary conditions that associate the normal and tangential field components on the boundary. In the developed method, the SHDB boundary condition is expressed in vector form that allows combining it with the tangential field integral equations. The obtained equations can be discretized with the standard method of moments (MoM) using the Rao-Wilton-Glisson (RWG) functions. Different combinations of the integral equations and boundary conditions are derived, and their numerical performance is studied and compared. It is demonstrated with numerical experiments that a much more stable system is obtained by considering the boundary conditions as extra equations, rather than integrating them into the SIEs. The solutions of the proposed nonsquare integral equation are verified with the physical optics approximations.
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Publisher Copyright: © 1963-2012 IEEE.
Keywords
Electromagnetic scattering, soft-and-hard/DB (SHDB) boundary, surface integral equation (SIE)
Other note
Citation
Kong , B , Yla-Oijala , P & Sihvola , A 2021 , ' Surface Integral Equation Method for Soft-and-Hard/DB Boundary Condition ' , IEEE Transactions on Antennas and Propagation , vol. 69 , no. 5 , 9234056 , pp. 2790-2797 . https://doi.org/10.1109/TAP.2020.3030919