Users Manual

GSM/GPRS Module Series
M66 Hardware Design
M66_Hardware_Design Confidential / Released 67 / 82
The module provides a Bluetooth antenna pad named BT_ANT.
Table 30: Pin Definition of the BT_ANT
The external antenna must be matched properly to achieve best
performance, so the matching circuit is necessary, the connection is
recommended as in the following figure:
Figure 41: Reference Design for Bluetooth Antenna
There are some suggestions for placing components and RF trace lying
for Bluetooth RF traces:
Antenna matching circuit should be closed to the antenna;
Pin Name Pin No. Description
BT_ANT 26 BT antenna pad
GND 27 Ground