3.6 Miscellaneous

This section describes the general layout guidelines.

  1. Keep any large metal objects as far away from the antenna as possible to avoid electromagnetic field blocking.
  2. Avoid enclosing the antenna in a metal shield.
  3. Keep any components that may radiate in 2.4 GHz to 2.5 GHz frequency band away from the antenna and, if possible, shield those components. Any noise radiated by the Host board in this frequency band reduces the device's sensitivity.
  4. Ensure that the traces route directly through the pads of the filter capacitors and not by a stub route. The following figure illustrates the correct way to route through a capacitor pad.
Figure 3-16. Correct Routing Through Filtering Capacitor Pad
Figure 3-17. Incorrect Stub Routing to Filtering Capacitor Pad