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A hybrid spectral-element finite-difference time-domain (FDTD) method is proposed for electromagnetic simulation in this letter. This proposed hybrid method takes full advantage of the efficiency of FDTD method with the traditional Yee's grid and the flexibility of spectral-element time-domain method in modeling complex geometry, and it inherits the powerful ability in parallelism. Furthermore, the...
This paper proposes a spectral-element time-domain method for the analysis of PIN diode limiter circuits. Physical model of PIN diode is used here and analyzed by the drift-diffusion model. Then the semiconductor device is incorporated into the circuit simulation. Numerical results demonstrate the accuracy and effectiveness of the proposed method.
Based on high order hierarchical vector function, the finite-element time-domain (FETD) method combined with tearing and interconnecting (TI) algorithm is presented. This method is efficient for time domain analysis of substrate integrated waveguide (SIW) structures, since the SIW structures have a lot of fine via holes. By means of the high order hierarchical vector function, the accuracy and ability...
An efficient direct method based on hierarchical matrices (H-matrices) was developed for the solution of large sparse finite element systems. H-matrix technique provides a data-sparse way to approximate the inverse of a finite element matrix which is dense originally. The approximate inverse can be computed and stored in the algebra of hierarchical matrices with almost linear complexity. The accuracy...
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