NTF transformation in lossy media

8. NTF transformation in lossy media

The near-to-far field transformation is usually applied in air, being the most typical environment for antennas. However, there are cases when transforming near fields to far fields in homogeneous media other than air is of interest. These may be biomedical applications or other cases of microwave propagation in large bodies. NTF transformation in lossless homogeneous dielectrics was provided in version 5.0, and now in version 6.0 it has been extended to lossy media. The region between the NTF box and absorbing boundaries must be homogeneous but may be filled with a medium of arbitrary permittivity er, permeability µr, conductivity sigma and magnetic loss sigmam. Please refer to Section UG 2.3.6 for examples of application and description of normalisation used.

Postprocessing dialogue (left) obtained after using ntfbkg.udo (right).