Application of Shifted Frequency Internal Equivalence to Multifrequency Scattering Problems


ÖZDEMİR S. , Unal A., KÖKSAL A.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, cilt.65, ss.4790-4796, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 65 Konu: 9
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1109/tap.2017.2728119
  • Dergi Adı: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
  • Sayfa Sayıları: ss.4790-4796

Özet

In this paper, a simple solution is presented for multifrequency electromagnetic scattering from inhomogeneous bodies. Shifted frequency internal equivalence is used to replace the electromagnetic problem at operating frequency omega by equivalent volume and current sources at internal frequency omega(0), and hence repeated calculation of system matrix as in the solution of volume integral equation at multiple frequencies is avoided. The volume field equation and surface tangent field equations obtained from the internal and external problems, the substitutes of the original scattering problem internally and externally, are solved by method of moments with pulse function expansion and point matching. Numerical results demonstrate that the proposed method is accurate and efficient within a wideband, fractional bandwidth being typically 100%.