Data Sheet

XY-MBA32A Bluetooth
Module
Data
sheet
27
www.newbitsiot.com
The ground plane shall be at least 5 mm from the edge of the antenna area of the
module.
 All module GND pins MUST be connected to mainboard GND. Place GND vias close to
module GND pads as possible. Unused PCB area on a surface layer can be flooded with
copper but place GND vias regularly to connect copper flood to the inner GND plane. If
GND floods the copper underside the module then connects with GND vias to the inner
GND plane.
 Even when the above-mentioned condition is satisfied, communication performance
may be significantly deteriorated depending on the structure of the product.
Bluetooth range performance is degraded if a module is placed in the middle of the
mainboard.
 For mainboard layout:
 Avoid running any signal line below the module whenever possible.
 No ground plane below the antenna.
 If possible, cut off the portion of the main board below the antenna.
Other modules mounting example: