High speed and RF PCB routing: Best practices and recommendations

This white paper presents practical PCB routing guidelines for RF, high-speed digital, and EMC-sensitive designs. It emphasizes the importance of a solid grounding strategy, recommending four-layer PCBs with uninterrupted ground planes to minimize impedance and noise. The document explains transmission line effects, impedance matching, microstrip and stripline routing, and methods to prevent signal reflections. It also covers component selection, PCB placement, grounding techniques, decoupling, via usage, and minimizing parasitic inductance. Additional recommendations include avoiding split ground planes, reducing signal loop areas, managing RF track crossings, and using ground via stitching. Following these practices improves signal integrity, EMC performance, and overall PCB reliability.