Comparison of CBFM-Enhanced Iterative Methods for MoM-Based Finite Antenna Array Analysis
Artikel i vetenskaplig tidskrift, 2022

In this paper we compare different iterative techniques enhanced by the CBFM, that are used to analyze finite arrays of disjoint antenna elements. These are based on the stationary-type methods (Jacobi, Gauss-Seidel, macro-block Jacobi), the nonstationary GMRES and the hybrid alternating GMRES-Jacobi (AGJ) method which combines these two types. In each iteration, the reduced CBFM system is constructed based on the previous iterates, the solution of which is used to update the solution vector in the next iteration with improved accuracy. In this way, the convergence of the classical iterative techniques can be greatly improved. The convergence rates and computational costs of the CBFM-enhanced iterative methods are analyzed by considering several MoM-based problems. The GMRES-based method, which employs the block-Jacobi preconditioner, outperforms the other methods when the MoM matrix is ill-conditioned. For well-conditioned MoM matrices with reduced diagonal dominance due to increased presence of the inter-element coupling effects, the AGJ method or the methods based on the stationary-type iterations may require smaller computational effort to converge to the desired solution accuracy in comparison to the GMRES-based approach.

Antenna arrays

Jacobian matrices


Computational efficiency

Antenna arrays

Iterative methods

method of moments (MoM)

Finite element analysis

iterative methods

mutual coupling

Method of moments

characteristic basis function method (CBFM)

macrobasis functions


Tomislav Marinovic

KU Leuven

Rob Maaskant

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

R. Mittra

University of Central Florida

Guy A.E. Vandenbosch

KU Leuven

IEEE Transactions on Antennas and Propagation

0018926x (ISSN) 15582221 (eISSN)

Vol. 70 5 3538-3548




Matematisk analys



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