The unimoment method applied to elliptical boundaries

Jian Ming Jin, Ninglong Lu

Research output: Contribution to journalArticlepeer-review


A hybrid finite-element method (FEM) is presented for electromagnetic scattering by inhomogeneous dielectric cylinders of arbitrary cross section. The method employs an artificial elliptical boundary to enclose the scatterer and divide the solution region into interior and exterior regions. The field in the interior region is formulated using the FEM, and the field in the exterior region is represented by an eigenfunction expansion involving Mathieu functions. These fields are coupled at the elliptical boundary by enforcing field continuity conditions. A numerical example is given to demonstrate the advantages of the method.

Original languageEnglish (US)
Pages (from-to)564-566
Number of pages3
JournalIEEE Transactions on Antennas and Propagation
Issue number3
StatePublished - 1997


  • Electromagnetic scattering
  • Finite-element methods

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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