Size and footprint
2.4 Antenna positioning
The module must be installed on a PCB, keeping the area dedicated for the PIFA antenna
outside the PCB outline. In the following image is shown an example of installation:
Image 14
: Antenna positioning
2.5 Notes
•
The area underneath the module must be kept free of components (both top and
bottom layers) and must be covered with solder resist.
•
The PCB top layer underneath the module must be free of nets, power planes and
vias. The bottom layer shall provide a ground plane.
•
The power supply of the module must be as clean as possible; it must be decoupled
placing a ceramic capacitor as near as possible at the Vcc pins, additional filtering
made by a ferrite bead is recommended.
•
Noisy electronic components (such as switching power supply) must be placed as
far as possible and adequately decoupled.
•
The ground pins of the module shall be connected to a solid ground plane.
•
Keep antenna clear of metal parts of the casing or system.
•
Don't use metal enclosures to avoid RF signal degradation.
Note:
Taking no account this recommendations may affect the radio performances.
EMB-Z2538PA Datasheet (rev 1.4)
Page 14 of 24
