Data Sheet

Module：EWN-8258FAT1CC
Waiting for your suggestion at anytime.
-
12 -
E-mail：[e-mail]
12 Reference design
12.1 RF
a) Under the antenna and in the two directions indicated by the arrow, avoid covering the
ground, routing and placing metal components. It is better to directly hollow out the PCB in this
area.
Fig 8 Antenna
b) It is recommended not to use any components within 30mm of the module antenna area,
and the module baseboard should also avoid wiring and covering the ground as much as
possible.
c) It is strongly recommended that the user place the antenna of the Bluetooth module close
to the edge of the backplane as far as possible when laying out the PCB, as shown in the figure
below, so as to ensure the good performance of the antenna.
Fig 9 Recommended PCB layout