A calderón-preconditioned single source combined field integral equation for analyzing scattering from homogeneous penetrable objects

Felipe Valdés, Francesco P. Andriulli, Hakan Bagci, Eric Michielssen

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A new regularized single source equation for analyzing scattering from homogeneous penetrable objects is presented. The proposed equation is a linear combination of a Calderón-preconditioned single source electric field integral equation and a single source magnetic field integral equation. The equation is immune to low-frequency and dense-mesh breakdown, and free from spurious resonances. Unlike dual source formulations, this equation involves operator products that cannot be discretized using standard procedures for discretizing standalone electric, magnetic, and combined field operators. Instead, the single source equation proposed here is discretized using a recently developed technique that achieves a well-conditioned mapping from div- to curl-conforming function spaces, thereby fully respecting the space mapping properties of the operators involved, and guaranteeing accuracy and stability. Numerical results show that the proposed equation and discretization technique give rise to rapidly convergent solutions. They also validate the equation's resonant free character. © 2006 IEEE.
Original languageEnglish (US)
Pages (from-to)2315-2328
Number of pages14
JournalIEEE Transactions on Antennas and Propagation
Volume59
Issue number6
DOIs
StatePublished - Jun 2011

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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