Title :
A robust iterative scheme for FEM applications terminated by the perfectly matched layer (PML) absorbers
Author :
Botros, Youssry Y. ; Volakis, John L.
Author_Institution :
Radiation Lab., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Because of their superior absorption characteristics, the Perfectly Matched Layer (PML) absorbers are used in truncating finite element domains. However, their implementation is equivalent to imposing active elements inside the main mesh. Consequently, the condition number of the resulting systems deteriorates. In this work, an efficient preconditioned generalized minimal residual (GMRES) iterative solver is developed and applied to systems truncated by PML absorbers. This iterative scheme is implemented and tested for different cases representing actual microwave circuit structures
Keywords :
convergence of numerical methods; electromagnetic wave absorption; finite element analysis; iterative methods; microstrip circuits; microwave circuits; FE domain truncation; FEM applications; PML absorbers; absorption characteristics; finite element domains; generalized minimal residual iterative solver; microwave circuit structures; perfectly matched layer; preconditioned GMRES iterative solver; robust iterative scheme; Absorption; Attenuation; Convergence; Dielectrics; Finite element methods; Iterative algorithms; Microwave circuits; Packaging; Perfectly matched layers; Robustness;
Conference_Titel :
Radio Science Conference, 1998. NRSC '98. Proceedings of the Fifteenth National
Conference_Location :
Cairo
Print_ISBN :
0-7803-5121-5
DOI :
10.1109/NRSC.1998.711512
