Even-mode excited substrate integrated coaxial line for short pulse and ultra wideband applications

In this work, an improved planar coaxial line is presented to meet the demand for the high performance transmission structure in the short-pulse and ultra-wideband (UWB) applications. The proposed transmission line features a lower dispersion as well as the propagation loss than that of the conventional substrate integrated coaxial line (SICL), while the compact size and low crosstalk characteristic of the SICL is maintained. In the experimental validation, time domain parameters, the fidelity and the Euclid distance, are adopted to evaluate the wideband performance of the presented structure. The improvement in dispersion and loss is well validated.