Convolutional Perfectly Matched Layer ABC for 3-D LOD-FDTD Using Fundamental Scheme

We present the convolutional perfectly matched layer (CPML) absorbing boundary condition (ABC) for fundamental scheme based 3-D LOD-FDTD. Methods to minimize the resultant computational load for solving 3-D microwave structures are proposed in addition to freeing the right hand side of the resultant update equations of matrix operations. A comparison with the conventional LOD-FDTD-CPML in terms of CPU time and memory requirements reveals the merits of the proposed F-LOD-FDTD CPML method in terms of lighter calculation burden and higher efficiency. Numerical results are presented to illustrate the significance of the proposed approach.