Data Sheet

Design recommendations
With 4 layers PCB design, it is recommended to keep the 1
st
layer under the module wi-
thout any layout and have a full ground plane on the 2
nd
layer (at least under the right part
of the module : under RF transceiver part).
All ground pads must be connected to ground.
In case of ground planes on different layers, these one must be connected together
through via.
Antenna path
The following figure gives an overview of a design with SMA connector for Antenna.
The antenna path must be designed with a 50 ohms line inserted into ground plane for bet-
ter performance. 1
st
and 2nd layer ground planes must be connected with via.
Antenna must be kept away from any metal part like batteries, etc … for better perfor-
mances.
Reflow temperature profile
The following figure & table give the reflow temperature profile of the MM002 module.
9
Module
Ground Plane
Power
Signals (or ground plane)
Figure 2 : 4 layer PCB design
Module
Figure 3 : Antenna path design
Ground plane