Just a general question. Why is it necessary to use a buffer when simulating 3-d anisotropic materials with FEM? As in surrounding the 3-d anisotropic body with say a box, with the dielectric properties of vacuum.
Cheers,
Patrick
For isotropic materials FEKO has an already implemented radiation boundary condition on the surface of the FEM region. Surface elements on the FEM boundary are used to couple with the Method of Moments in a hybrid FEM/MoM solution. Or in a FEM only solution, an absorbing boundary condition is used.
While it is theoretically possible to implement a radiation boundary condition for anisotropic FEM dielectrics, it is just not implemented in FEKO yet.
