Full-Wave Fast Solver for Circuit Devices Modeling

The analysis of complex circuit components with electrically small size is an important problem for radio frequency circuit modeling. In this paper, we present a fast solver which is based on low-frequency stable integral equation and accelerated with the multilevel accelerated Cartesian expansion algorithm (MLACEA). MLACE algorithm is usually based on electric field integral equation which suffers from low-frequency breakdown problems. To keep the algorithm stable, the augmented electric field integral equation (AEFIE) is used in our solver. Regarding the truncation order of the expansion, the efficiency and accuracy of MLACEA are investigated. By adjusting the truncation order, we can keep the algorithm in good performance. Numerical examples show the efficiency and the capability of the proposed method.