Robust millimeter-wave integral approach for efficient modeling of asymmetric coplanar lines

A millimeter-wave modal integral technique has been devoted to fast and accurate modeling of asymmetric coplanar-type structures. By introducing a quasi-symmetric approach, CPU-time required to analyze asymmetric coplanar lines was significantly reduced, leading to faster models without sacrificing the overall design accuracy. To achieve this aim, a rigorous formulation was developed; trial functions of C- and π-modes were obtained from the quasi-symmetric model and applied to the asymmetric case. The proposed approach was demonstrated through successful comparison with published data.