MoL-analysis of periodic structures

A new algorithm for the analysis of finite three-dimensional symmetrical periodic structures by the Method of Lines (MoL) is presented and substantiated. It combines the numerical stable impedance transformation with the Floquet´s theorem. A numerically stable way of obtaining Floquet modes using open- or short-circuit matrix parameter description of two-ports is proposed. To validate the described method, a microstrip meander line is designed, realized and measured. Comparison between measured and simulated results is given.