Sparse solution of an integral equation formulation of scattering from open PEC targets

A recently developed compression and sparse solution strategy for electromagnetic problems is applied to integral-equation formulations of scattering from perfectly conducting targets in three dimensions. It is shown that the resulting representations of both the impedance matrix and its inverse are sparse at low-to-moderate frequencies. Limitations and possible extensions of the sparse algorithms are also discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 476–480, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21383