FEM full-wave analysis of substrate integrated waveguide with reduced model method

A H-LU decomposition-based direct method enhanced second-order Krylov subspace projection based model order reduction (MOR) is presented. The construction of the projection matrix is the most important process in the Krylov subspace projection based MOR where an inverse of the sparse matrix is involved in the construction of the projection matrix. It will be intractable for the computational capacity of a personal computer when the size of the problem is large. A H-LU decomposition-based direct method is employed to the MOR. Numerical results for the analysis of the substrate integrated waveguide (SIW) bandpass filter demonstrate the validity of the proposed algorithm.