Reduction of FDTD Stair-Casing Error regarding to Metamaterials by Using High-Order Polynomial Transformation Functions

Figure 5

Material parameters of the fifth-order function: (a) the cloak, (b) the rotator, and (c) the concentrator. The parameters had smaller changes near boundaries and larger changes in the middle compared to those obtained with f₃.

(a)

(b)

(c)