The resistance of strip conductors embedded in a two-dimensional field distribution

The AC resistance of strip conductors is investigated. A principal difference compared to the classical one-dimensional theory is shown: a distinct intermediate frequency range can be observed between the DC and the skin-effect limit. The author provides details on that range and points out consequences for circuit modeling. This finding applies in particular to miniaturized coplanar waveguide and coupled-strip structures as used in the monolithic microwave integrated circuits (MMICs). In that case, the intermediate range extends over a considerable part of the microwave and millimeter-wave spectrum.<>