This paper investigates the characteristics of surface waves propagating on a grounded\nanisotropic dielectric slab. Distinct from the existing analyses that generally assume that the fields of\nsurface wave uniformly distribute along the transverse direction of the infinitely large grounded slab,\nour method takes into account the field variations along the transverse direction of a finite-width slab.\nBy solving Maxwell�s equations in closed-form, it is revealed that no pure transverse magnetic (TM)\nor transverse electric (TE) mode exists if the fields are non-uniformly distributed along the transverse\ndirection of the grounded slab. Instead, two hybrid modes, namely quasi-TM and quasi-TE modes,\nare supported. In addition, the propagation characteristics of two hybrid modes supported by the\ngrounded anisotropic slab are analyzed in terms of the slab thickness, slab width, as well as the\nrelative permittivity tensor of the anisotropic slab. Furthermore, different methods are employed to\ncompare the analyses, as well as to validate our derivations. The proposed method is very suitable\nfor practical engineering applications.
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