Forward-backward domain decomposition method for finite element solution of electromagnetic boundary value problems

Ozgun, Ozlem
Kuzuoğlu, Mustafa
We introduce the forward-backward domain decomposition method (FB-DDM), which is basically an improved version of the classical alternating Schwarz method with overlapping subdomains,for electromagnetic, boundary value problems. The proposed method is non-iterative in some cases involving smooth geometries, or it usually converges in a few iterations in other cases involving challenging geometries, via the utilization of the locally-conformal PML method. We report some numerical results for two- dimensional electromagnetic scattering problems. (c) 2007 Wiley Periodicals, Inc.


Multicenter perfectly matched layer implementation for finite element mesh truncation
Ozgun, Ozlem; Kuzuoğlu, Mustafa (Wiley, 2007-04-01)
We present the multicenter perfectly matched layer (PML) technique, which is an easy and practical conformal PML implementation, obtained by the complex coordinate stretching, to the problem of mesh truncation in the finite element method. After developing the analytical background of this method. we demonstrate its performance in electromagnetic radiation/scattering problems. (c) 2007 Wiley Periodicals, Inc.
An efficient solution of the generalized eigenvalue problems for planar transmission lines
Prakash, VVS; Kuzuoğlu, Mustafa; Mittra, R (Wiley, 2001-11-05)
This paper presents an efficient solution for solving the generalized eigenvalue equation arising in the finite-element (FE) formulation of propagation characterization of planar transmission-line structures. A two-dimensional (2-D) finite-element method (FEM) is used for analyzing the uniform planar transmission lines. The Arnoldi algorithm is used in conjunction with the multifrontal decomposition of the system matrix for solving the eigensystem. Convergence is typically obtained within a few iterations o...
Electromagnetic Target Classification using time frequency analysis and neural networks
Sayan, Gönül; Leblebicioğlu, Mehmet Kemal (Wiley, 1999-04-01)
This paper demonstrates the feasibility and advantages of using a self-organizing map (SOM)-type neural network classifier for electromagnetic target recognition. The classifier is supported by a novel feature extraction unit in which the Wigner distribution (WD), a time-frequency representation, is utilized for the extraction of natural-resonance-related energy feature vectors from scattered fields. The proposed target classification technique is tested for a set of canonical targets, displaying an excelle...
Numerical Constructions of Testing Functions for Improving the Accuracy of MFIE and CFIE in Multi-Frequency Applications
Karaosmanoglu, Bariscan; Altinoklu, Askin; Ergül, Özgür Salih (EMW Publishing, 2016-01-01)
We present a new approach based on numerical constructions of testing functions for improving the accuracy of the magnetic-field integral equation (MFIE) and the combined-field integral equation (CFIE) with low-order discretizations. Considering numerical solutions, testing functions are designed by enforcing the compatibility of the MFIE systems with the accurate coefficients obtained by solving the electric-field integral equation (EFIE). We demonstrate the accuracy improvements on scattering problems, wh...
Quasi-static solutions of elliptical, cylindrical-coupled parallel coplanar waveguide, and coupled parallel coplanar waveguide with finite ground planes
Duyar, Mehmet; Akan, Volkan; Yazgan, Erdem; Bayrak, Mehmet (Wiley, 2007-07-01)
This article presents the quasi-static analyses of elliptical-coupled parallel coplanar waveguide (ECP CPW), cylindrical-coupled parallel coplanar waveguide (CCP CPW), and coupled parallel coplanar waveguide (CP CPW) with finite ground planes. Conformal-mappi ng techniques have been used through the analyses. The obtained results show good agreement with IE3D electromagnetic-circuit solver software's simulations for the planar case. In addition, the results have been compared with others available in the li...
Citation Formats
O. Ozgun and M. Kuzuoğlu, “Forward-backward domain decomposition method for finite element solution of electromagnetic boundary value problems,” MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, pp. 2582–2590, 2007, Accessed: 00, 2020. [Online]. Available: