Uniaxial and Biaxial Substrate Effects On Finline Characteristics

The effect of uniaxial and biaxial substrates on the frequency-dependent properties of a bilateral finline is investigated in this article. The finline characteristics are obtained by using the spectral-domain procedure in conjunction with the Galerkin method. Investigation of uniaxial substrates indicates that there is a particular optical axis direction for which the permittivity component in that direction dominates the finline behavior. In addition, a study has been carried out which determines the error which results when the material layer anisotropy is neglected.