Datasheet

Datasheet [Page 22]
EMW3166
the module protrudes at least 15mm from the mother board PCB and any metal enclosure. If this is not possible use
the on board U.FL connector to route to an external antenna. The area under the antenna end of the module should be
keep clear of metallic components, connectors, vias, traces and other materials that can interfere with the radio
signal.
Minimum size of keep-out zone around antenna：
Figure 9 Antenna minimum clearance zone
U.F.L RF Connector 4.3
This module use U.F.L type RF connector for external antenna connection.