Howard
Ansys Employee

Hello turow,

      I am not sure where is the statement is from and meaning of "non-linear", but I suppose it may be for using non-linear permeability for this impedance boundary.

      I believe you are looking for the impedance boundary. Please review Maxwell help manual, to find “Impedance Boundary” and “When to Use Impedance Boundary”.

       There is more information in the manual, in Maxwell 2D Technical Notes -> Boundary conditions -> Impedance. Thanks.

HDLI