Quectel M66

GSM/GPRS Module Series
M66 Hardware Design
M66_Hardware_Design Confidential / Released 60 / 80
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:
Module
BT_ANT
0R
NM NM
Figure 42: 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;
 Keep the RF traces as 50Ω;
 The RF traces should be kept far away from the high frequency signals and strong disturbing source.
Quectel
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