Efficient finite element solution of low-frequency scattering problems via anisotropic metamaterial layers

Ozgun O., KUZUOĞLU M.

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, cilt.50, sa.3, ss.639-646, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Sayı: 3
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1002/mop.23167
  • Dergi Adı: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.639-646
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We introduce a new technique which remedies the drawbacks in the Finite Element solution of low-frequency electromagnetic scattering problems, through the usage of an anisotropic metamaterial layer which is designed by employing the coordinate transformation approach. The usual finite element method should utilize a "challenging" mesh generation scheme to accurately simulate the "small" objects in scattering problems; on the contrary, the proposed technique provides a considerable reduction in the number of unknowns, and requires a more convenient and simpler mesh structure inside the computational domain. The most interesting feature of the proposed method is its capability to handle arbitrarily shaped "small" scatterers by using a "single" mesh and by modifying only the constitutive parameters inside the matamaterial layer. We report some numerical results for two-dimensional electromagnetic scattering problems. (c) 2008 Wiley Periodicals, Inc.