17.2. Trace design
Figure 27: Trace design: Layout
Figure 28: Reference design: Stack-up
• Top layer is used for routing, filled with ground plane except area under the module
and antenna free area.
• Second layer is filled with ground plane, except the antenna free area.
• Third layer is the supply layer, except antenna free area. Some routing is allowed, not
dividing the supply layer in to many or too small parts.
• Bottom layer is used for routing and filled with ground.
Proteus-III reference manual version 1.3
© August 2020
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