Abstract: Disclosed are various devices, systems and methods for testing broadband differential coupling circuits that are capable of measuring the amount of extraneous interference and noise in such circuits. In preferred embodiments, NEXT and FEXT crosstalk performance characteristics of differential coupling circuits are provided.

Abstract: A stripline structure. The stripline structure includes a stripline transmission line, a first ground plane, a first dielectric layer overlaying the first ground plane, a conductive trace overlaying the first dielectric layer, a second dielectric layer overlaying the conductive trace, a second ground plane overlaying the second dielectric layer, multiple first conductive vias, and multiple second conductive vias. Each first conductive via and each second conductive via electrically connects the first ground plane to the second ground plane. The multiple first conductive vias are located along a first line parallel to the conductive trace, and the multiple second conductive vias are located along a second line parallel to the conductive trace. The first line and the second line are located on opposite sides of the conductive trace.