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In part one of this article, Bert Simonovich explained how air entrapment is the primary reason for Dkeff and phase delay discrepancies between simulation and DUT measurements. Read on to discover how to fix this issue.
In this article, Bert Simonovich shows how using Dkeff calculated from phase or time delay measurement method will lead to inaccurate simulation results for printed circuit board (PCB) transmission lines.
The first available roughness models, such as Hammerstad, Hemispherical, Huray aimed to predict loss increase due to metal roughness. However, there was a problem. Read on to find out more.
