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July 18, 2017
Measuring Glass Weave Skew and the Identification of an Important Hidden Variable Artifact This article summarizes a technique to measure the magnitude of the glass weave skew effect and an observation of an important hidden variable which might explain why there is so much confusion about this effect in the industry.
Better, Faster, More Confident 25+ Gbps Via Design: Applying Decomposition and Image Impedance Decomposition and image impedance can accelerate and improve design by allowing designers to confidently look inside structures and interpret the results with an intuitive figure-of-merit.
Additional Trace Losses Due to Glass-Weave Periodic Loading This article covers glass weave periodic loading, the impact of trace route to glass weave angle, the impact of meandering trace routes and test structure measurement.
Measuring Characteristic Impedance on Fine Line PCBs When measuring characteristic impedance on fine line traces, it is important to use a long enough test vehicle to enable a good line fit away from TDR pulse settling and launch aberrations so as you can apply launch point extrapolation.
A Practical Method to Model Effective Permittivity and Phase Delay Due to Conductor Surface Roughness When modeling lossy transmission lines, using manufacturers’ published dielectric and conductor material properties, often leads to a discrepancy in Dkeff due to increased phase delay caused by surface roughness. Here is a method to address this issue.
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