Abstract
This paper describes an efficient model-reduction method for the modeling of composite configurations comprising metallic and non-metallic boundaries arising in electromagnetic problems based on the tangential vector finite element method (TVFEM). The field equations are formulated using the Laplace-domain vector finite element method and are reduced to lower-order models using the complex frequency hopping (CFH) technique. CFH is a moment matching technique which has been used successfully in the circuit simulation area for the solution of large sets of ordinary differential equations. The proposed technique is faster than the conventional approach by one to three orders of magnitude. The accuracy and computational efficiency of the algorithm are discussed and illustrative examples are presented for cavity resonators and stripline.
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