UPML吸收边界在电磁脉冲孔缝耦合计算中的应用

Application of UPML Absorbing Boundary in Calculation of Electromagnetic Pulse Coupling into Slot

用时域有限差分(FDTD)法模拟电磁脉冲与腔体的孔缝耦合过程,利用各向异性理想匹配层(UPML)作为吸收边界截断计算空间。通过对腔体内特定观察点的时、频特性计算,得到了电磁脉冲对孔缝的耦合特性,计算结果表明了UPML吸收边界的有效性。

This article simulates the coupling processes of electromagnetic pulse into a cavity with a slot, and utilizes the uniaxial anisotropic perfectly matched layer （UPML） as absorbing boundary condition to truncate the calculation region by a finite difference time domain method （FDTD）. According to the calculation of electric field and its frequency domain characteristic of some special grids, the rules of electromagnetic pulse coupling into a cavity with a slot are obtained. The result shows that uniaxial anisotropic perfectly matched layer is effective in serving as absorbing boundary.