PCB Loss Measurement Metrology Electrical Design Guide

Channel loss is a dominant factor for the signaling performance of high-speed I/Os. Some platform design guides clearly specify the Printed Circuit Board (PCB) trace-only loss requirement. The via effect has a big impact on the loss of the entire channel and how to characterize the loss of a stripline design with the via effect being de-embedded is very important for a designer to select the right material and manufacturing process control, balancing the platform cost and performance requirement.