Texas Instruments CC3100 SimpleLink Wi-Fi User Manual page 9

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4.2.2 Layer-2
Layer-2 is primary ground plane for the board reference (see
section, which is per the antenna guidelines. This return current path for the input de-coupling capacitors
(C11, C13, and C18) is routed on L2 using thick traces to isolate RF ground from a noisy supply ground.
This is also required to meet the IEEE spectral mask specifications.
SWRU370B – June 2014 – Revised August 2018
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Figure 4. Layer-2
CC3100 and CC3200 SimpleLink™ Wi-Fi
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Figure 4). It has a void for the antenna
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