Validation of Higher-Order Approximations and Boundary Conditions for Lossy Conducting Bodies


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Sukharevsky I. O. , ALTINTAŞ A.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, cilt.62, ss.4656-4663, 2014 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 62 Konu: 9
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1109/tap.2014.2331991
  • Dergi Adı: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
  • Sayfa Sayısı: ss.4656-4663

Özet

The problem of high-frequency diffraction by a smooth lossy body with high conductivity is considered. In addition to the geometrical optics approximation, additional asymptotic terms are derived to take into account the curvature of the boundary and material properties. Since these higher-order terms are derived by taking into account exact boundary conditions, it is easy to learn about the limitations of impedance conditions and to determine more accurate approximate conditions. The obtained higher-order boundary conditions and their limitations are numerically validated by solving Muller's second-kind integral equations.