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File Name: Impact of Backplane Connector Pin Field on Trace Impedance and Crosstalk

The signal integrity effects of lowered impedance and induced crosstalk are well understood when signals traverse through the PTH vias. However, the signal integrity impact on trace impedance and crosstalk in the vertical direction between the traces in the adjacent stripline layers are not well understood when signals are simply passing through the connector pin field region. These effects are present because of the lack of full ground cover for the stripline signal traces in the pin field region due to the large anti-pads for the PTH vias. This paper addresses the impact of these effects on the system margins. Both single ended and differential connector pin fields are considered.

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Download Now: designcon2007kolliparapaper.pdf