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

Beibei Kong*, Pasi Yla-Oijala, Ari Sihvola

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

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.

AlkuperäiskieliEnglanti
Artikkeli9234056
Sivut2790-2797
Sivumäärä8
JulkaisuIEEE Transactions on Antennas and Propagation
Vuosikerta69
Numero5
DOI - pysyväislinkit
TilaJulkaistu - toukokuuta 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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