Accurate computation of wide-band response of electromagnetic systems utilizing narrow-band information

Krishnamoorthy Kottapalli, Tapan K. Sarkar, Yingbo Hua, Edmund K. Miller, Gerald J. Burke

Research output: Contribution to journalArticle

88 Scopus citations

Abstract

Cauchy's technique for interpolating a rational function from samples of frequency responses and/or their derivatives is investigated. This technique can be used to speed up the numerical computations of parameters, including input impedance and RCS of any linear time-invariant electromagnetic system. This technique is utilized to find the far field of a slit conducting cylinder (TM incidence) over a bandwidth utilizing the information about the current and its derivatives at a few sample points. The numerical results presented are in good agreement with exact computational data. This technique is a true interpolation/extrapolation technique as it provides the same defective result as the original electric field integral equation at a frequency which corresponds to the internal resonance of the closed structure.

Original languageEnglish (US)
Pages (from-to)682-687
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Volume39
Issue number4
DOIs
StatePublished - Apr 1 1991

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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