How Understanding Anisotropic Materials & Tolerances Could Increase Performance at 112/224Gbps & Beyond
While perfectly transparent virtual channels can be designed in simulations, real fabricated boards differ due to manufacturing variations and limited understanding of material anisotropy. As channel bandwidths increase to 56 GHz and above, accurately defining material behavior in simulations becomes crucial. This paper analyzes second-order design features using precision measurements of test vehicles. We propose a metric-driven methodology based on AI/ML to determine relevant parameters for simulating anisotropic behavior that matches both time and frequency domain measurements.
