Hi Tazeen,
As suggested please refer a section titled "Defining Anisotropic Tensors" from HFSS help PDF. There you will find more details on tensor conversion from Spherical to
Cartesian co-ordinate system. HFSS accepts definitions for spatial-dependent martial properties only using definitions in a Cartesian coordinate system. Spherical and Cartesian bases are related throgh transformation matrix. Thanks.
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