Simulation of Electromagnetic Wave Propagation in 3D Integrated Module Based on 3D ADI-FDTD Algorithm

In order to solve the problem of electromagnetic propagation in three-dimensional (3-D) heterogenous integrated modules. This paper presents an alternating direction implicit finite-difference time-domain (ADI-FDTD) method. This method can be well applied to 3-D electromagnetic problems. The excitation source suitable for this method is given in this paper. In order to effectively analyze electromagnetic problems at infinity, the ADI-FDTD algorithm combines the uniaxial PML(UPML) and the Mur first order absorbing boundary condition; the former is used for wave propagation in direction z, and the latter used for other boundaries. Finally, a demo is given to compare the results calculated by ADI-FDTD with that calculated by conventional FDTD algorithm. Numerical results show that the ADI-FDTD is not constrained by conditional stability, the calculation time can be greatly shortened and the calculation efficiency of FDTD is increased. The introduction of absorption boundary condition makes the numerical simulation more accurate and the calculation more efficient.