A Z-transform implementation of higher-order perfectly matched layer

作者：Feng Naixing^*; Li Jianxiong

来源：Chinese Journal of Computational Physics, 2012, 29(2): 271-276.

• Complex frequency shifted
• Electromagnetic wave interaction
• Evanescent wave
• Finite difference time-domain
• Finite width
• Higher order
• Higher-order scheme
• Low frequency
• Numerical validations
• Perfectly Matched Layer
• Z-transform methods

With stretched coordinate perfectly matched layer(SC-PML) formulations and Z-transform method, an efficient and unsplit-field implementation of higher-order PML scheme with more than one pole is proposed which truncates finite-difference time-domain(FDTD) lattices. The higher-order PML has advantages of both conventional PML and complex frequency shifted PML (CFS-PML) in terms of absorbing performances. A numerical validation of the proposed formulations is provided through a 2D TE-polarized electromagnetic wave interaction with an infinitely long perfectly electric conductor (PEC) sheet with finite width. It is shown that the proposed PML formulations with higher-order scheme are efficient in terms of attenuating low-frequency propagating waves and evanescent waves and reducing late-time reflections. It has better absorbing performances than conventional SC-PML and convolutional PML (CPML) with CFS scheme.

• 出版日期2012
• 单位天津工业大学