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Page 86 of 105

DECEMBER 2018 I DESIGN007 MAGAZINE 87 Starting from the basic parts of PCBs, test- ing has been done on power, ground, and circuit layers to determine if including fractal design principals in their design changes how they perform electrically. The results were quite dramatic. Teams of engineers pointed out changes that point to higher-frequency operations with less radiated noise with the same materials, indicating that no matter what materials are chosen for construction, the design will be improved by incorporating fractal design techniques. There is a general reduction in the amount of radiated noise when proper rules are used Figure 5: Changing small, unused features on a conductive layer can alter the PCB's electrical response. Figure 4: Description of the generating surfaces contributing to PCB edge noise.

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