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A plated-through-hole (PTH) via is commonly used to route vertical signal transitions between layers of a multi-layered PCB. It is well known that a via stub, the portion of the PTH via not directly involved in the layer transition, can have a significant impact on signal integrity, effectively acting as a bandpass filter, degrading the design margin or even potentially causing failures. This paper...
Dense, complex, and cost conscious board designs often make it impractical to avoid using non-ideal return paths in board-level transmission line interconnections. For example, vertical transitions without specific local return vias and split reference plane constructions are frequently used. The use of non-ideal return paths is likely to result in signal power loss and/or unwanted coupling excited...
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