10.3 Interferers

RF receiver performance is impacted due to interferers on the board that radiate noise into the antenna or coupling into the RF traces that go to the LNA input. Follow the guidelines given below to avoid the performance degradation:

• Ensure that there is no noisy circuitry placed anywhere near the antenna or the RF traces.
• All noise-generating circuits must also be shielded so they do not radiate noise that is picked up by the antenna.
• Ensure that there are no traces routed underneath the RF portion of the ATWINC15x0B.
• Ensure that there are no traces routed underneath any of the RF traces from the antenna to the ATWINC15x0B input. This applies to all layers. Even if there is a ground plane on a layer between the RF route and another signal, the ground return current could flow on the ground plane and couple into the RF traces.