A perturbation technique to analyze the influence of fiber weave effects on differential signaling

We study differential signaling via a pair of striplines in a substrate that is comprised of an epoxy/fiberglass woven composite structure. The transmission characteristics, which are deteriorated due to the presence of the fiber weave, are analyzed via an efficient modeling technique for nonuniform transmission lines. This technique is based on the solution of the pertinent differential equations using a perturbation approach. For a challenging application example, it is shown that the unavoidable phase errors can be controlled by subdividing electrically long lines into smaller pieces, as such increasing accuracy whilst maintaining efficiency.