Edge-coupled offset stripline with one dielectric below and one above the traces
As in the case of the single-ended Offset Stripline construction this structure can be made up as a dual construction with a mirrored edge-coupled differential pair set a distance from the upper reference plane. The lower pair is routed orthogonal to the upper to minimise layer to layer coupling and cross-talk.
The model below shows a structure with two layers below the traces and one above and includes the resin rich region between the traces
Edge-coupled offset stripline structure modelling the resin-rich region between the traces