User's Manual

Application Note [Page 12]
EMW3166_Guide For User Design
RF design 2.5
2.5.1 PCB antenna design
When integrating the WiFi module with on board PCB printed antenna, make sure the area around the antenna end
the module protrudes at least 15mm from the mother board PCB and any metal enclosure. The area under the
antenna end of the module should be keep clear of metallic components, connectors, sensors, traces and other
materials that can interfere with the radio signal.
Figure 7 Minimum Size of Keep-out Zone Around Antenna
Areas on the mother board MXCHIP recommended showed below can reduce the noise to PCB antenna and radio
signal.
User
Pad
User
Pad
User pad
Model Number
PCB Antenna
position
Left
headromm
area
Right
headromm
area
Front
headromm
area
Antenna headromm area
distance with user pad
Back
headromm
area
Observe
headromm
area
Front
headromm
area