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.