Reduction in radiated emission by symmetrical power-ground layer stack-up PCB with no open edge

Power-ground plane resonance of multi-layer PCB causes a large amount of emission from the edges of power-ground plane. To reduce the emission, symmetrical power-ground layer stack-up PCBs with no open edge have been developed. The symmetrical boards significantly reduce the emission to almost no peak and additionally have the great advantages of signal integrity and packaging density.