User's Manual

Layer3
L2 under ANT
PAD
L2 under RF
PAD
L3 under ANT
PAD
Layer2
Layer4
L4 under ANT
PAD
Layer1
Under RF
TEST point
RF PAD
ANT PAD
GND PAD
Matching
Figure 9: Reference PCB design with antenna pad in a four-layer PCB
If RF connector is adopted, place the RF connector close to module RF_ANT, and add several
ground via close to the GND PAD of RF connector. Figure 10 is the reference PCB design.