Balanced Electric-Magnetic Absorber Green's Function Method for MoM Matrix Thinning and Conditioning

Naor R. Shay, Daniel S. Weile, Raphael Kastner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A balanced (Weston-type) absorber, characterized by both electric and magnetic loss mechanisms, can be placed within the null field inside the equivalent surface currents replacing a perfectly conducting or homogeneous scatterer. The absorber, referred to as the filler, substantially reduces the interactions between pairs of opposing basis/testing functions. The resultant moment matrix, formulated with the filler Green's function (GF), is thinned accordingly. Moreover, most annulled elements need not be computed at all, thereby reducing substantially the matrix fill time. The lossy nature of GF also serves to eliminate spurious internal resonances and thus makes the electric or magnetic field integral equation matrix to be well conditioned without resorting to a combined field integral equation.

Original languageEnglish
Pages (from-to)2996-3001
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume66
Issue number6
DOIs
StatePublished - Jun 2018

Keywords

  • Electric field integral equation (EFIE)
  • ill- and well-conditioning
  • method of moments (MoM)
  • sparse matrices

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