Investigation of Numerical Stability of 2D FE/FDTD Hybrid Algorithm for Different Hybridization Schemes

Neelakantam VENKATARAYALU  Yeow-Beng GAN  Le-Wei LI  

IEICE TRANSACTIONS on Communications   Vol.E88-B    No.6    pp.2341-2345
Publication Date: 2005/06/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.6.2341
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on 2004 International Symposium on Antennas and Propagation)
FE/FDTD,  numerical stability,  hybrid algorithms,  

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Numerical Stability of the Finite Element/Finite Difference Time Domain Hybrid algorithm is dependent on the hybridization mechanism adopted. A framework is developed to analyze the numerical stability of the hybrid time marching algorithm. First, the global iteration matrix representing the hybrid algorithm following different hybridization schemes is constructed. An analysis of the eigenvalues of this iteration matrix reveals the stability performance of the algorithm. Thus conclusions on the performance with respect to numerical stability of the different schemes can be arrived at. Further, numerical experiments are carried out to verify the conclusions based on the stability analysis.