Application of shifted frequency internal equivalence to multifrequency scattering problems

Sevda Özdemir, Alper Ünal, Adnan Köksal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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 ω by equivalent volume and current sources at internal frequency ω0 , 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%.

Original languageEnglish
Article number7983003
Pages (from-to)4790-4796
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Volume65
Issue number9
DOIs
Publication statusPublished - Sept 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 1963-2012 IEEE.

Keywords

  • Electromagnetic scattering
  • Shifted frequency internal equivalence (SFIE)
  • Surface tangent field equation (STFE)
  • Volume field equation (VFE)
  • Wideband method of moments (MoM)

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