Loss calculation of single and coupled strip lines by extended spectral domain approach

The extended spectral domain approach is used to calculate the losses of strip lines of arbitrary thickness. This versatile method is applicable to single and coupled strip lines with isotropic and/or anisotropic substrates. Both the simpler quasistatic and the rigorous hybrid-mode formulation can be developed on the same basis. Numerical examples presented include loss calculations for strip lines with thick conductors as well as thin conductors, with thickness comparable to or less than the skin depth. Numerical results show the usefulness and the limitation of the quasistatic analyses.<>