Title :
MR-preconditioned ACA for sub-wavelength discretization
Author :
Echeverri, M. ; Vipiana, Francesca ; Vecchi, Giuseppe ; Francavilla, Matteo A.
Author_Institution :
Antenna & EMC Lab. (LACE), Politec. di Torino, Turin, Italy
Abstract :
A stable fast solver is proposed for the EFIE-MoM analysis of problems with significant sub-wavelength details and/or discretization, and overall sizes up to a few wavelengths. The Adaptive Cross Approximation is used to compress the EFIE-MoM matrix, while a Multiresolution preconditioner is used to improve the ill-conditioning associated to the EFIE in the low frequency and/or dense-discretization regime. Numerical results shows the effectiveness of the proposed approach.
Keywords :
approximation theory; conductors (electric); electric field integral equations; electromagnetic wave scattering; matrix algebra; method of moments; EFIE-MoM analysis; EFIE-MoM matrix compression; MR-preconditioned ACA; adaptive cross approximation; dense-discretization regime; electric field integral equation; frequency regime; ill-conditioning improvement; low frequency regime; method-of-moments; multiresolution preconditioner; perfect electric conductor problems; subwavelength discretization; Antennas; Approximation methods; Convergence; Electromagnetic compatibility; Matrix decomposition; Method of moments; Skeleton; Method of moments; adaptive cross approximation; fast solver; multiresolution;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6710692
