Contactless Characterization of Coplanar Stripline Discontinuities by RCS Measurement

This paper presents a contactless approach to characterize coplanar stripline discontinuities based on a radar cross section measurement method. With this approach, the values of the equivalent lumped element models are determined for two discontinuities often encountered in practice: open circuit and short circuit. The discontinuities are incorporated into two different very simple resonators. But contrarily to what is usually done, here the resonators are considered as radar resonant targets and are illuminated by a plane wave. The incremental electrical length due to the discontinuities causes a shift of the resonance frequency, which is used for the extraction of the parameters. The values obtained from full-wave simulations are compared to measurements and to other data available from previous studies.