User's Manual

16
6. ANTENNA KEEP OUT AREA
Figure 6: PCB design around ACX antenna
Figure four above illustrates how PCB design around the antenna of WT11 should be
made. The most important thing is that there is no copper (ground plane or traces)
underneath or in the close proximity of the ACX antenna.
It’s also very important to have grounding vias all the way in the border between ground
plane and free space, as illustrated with black and gray dots in figure 4. This prevents the
RF signal for reflecting back to the PCB and signal lines over there.
For more information, please refer to the WT11 design guide and design references.