Power tracks instead of planes to reduce radiated electromagnetic fields

The noise voltage in the reference or ground of a printed circuit board is often the cause of unwanted radiated emission. Power supply planes attribute to the noise voltage. By replacing the power supply planes by tracks, the noise voltage in the reference or ground can be reduced, which leads to a considerable reduction of the radiated electromagnetic fields. A potential disadvantage of using power tracks is a decreased power quality, due to a higher ripple voltage. Actual circuits, fed via power planes or power tracks have been designed and measured showing the impact on radiated electromagnetic fields with constant power quality