Comparison among different approaches for the full-wave mom characterization of open-ended microstrip lines

The reflection coefficient of an open-ended boxed microstrip line is computed via three different approaches. Two of the approaches are based on the computation of the input impedance at the plane of the excitation, and the third approach is based on the application of the matrix pencil technique. It is shown that the latter approach is more robust and reliable than the former two approaches for the particular problem solved. (C) 1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 246-248, 1999.