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Fast Waveguide Eigenanalysis by Wide-Band Finite-Element Model-Order Reduction

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3 Author(s)
Shih-Hao Lee ; Dept. of Electr. Eng., Graduate Inst. of Commun. Eng., Taipei, Taiwan ; Huang, Ting-Yi ; Wu, Ruey-Beei

An efficient method for fast wide-band eigenmode analysis is presented in this paper. The finite-element solution space is projected to a subspace containing frequency-dependent information obtained at a single frequency by a Lanczos algorithm and modified perturbation theory, resulting in a single-point reduced-order model accurate over an extremely wide frequency range. A numerical procedure is developed to extract a desired mode from the reduced-order model for fast frequency sweep and is then applied to several practical problems, which demonstrate the solution accuracy and computational efficiency of the proposed method.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 8 )