Wide‐bandwidth thru‐reflect‐line calibration for empty substrate‐integrated coaxial line with grounded coplanar transitions

Abstract

Empty coaxial structures built with printed circuit boards have low radiation, low losses, high quality factor and non‐dispersive features. The full integration of empty substrate‐integrated coaxial line (ESICL) in a planar substrate is nowadays a fact thanks to a grounded coplanar transition. To properly characterize and measure this new ESICL family of devices, a low cost and easy to manufacture thru‐reflect‐line calibration kit is proposed to de‐embed not only the connectors and feeding lines, but also the ESICL transitions.