User's Manual

GSM/GPRS Module Series
M26 Hardware Design
M26_Hardware_Design Confidential / Released 59 / 80
4.1.5. RF Cable Soldering
Soldering the RF cable to RF pad of module correctly will reduce the loss on the path of RF, please refer
to the following example of RF soldering.
Figure 41: RF Soldering Sample
4.2. Bluetooth Antenna Interface
M26 supports Bluetooth interface. Bluetooth is a wireless technology that allows devices to communicate,
or transmit data or voice, wirelessly over a short distance. It is described as a short-range communication
technology intended to replace the cables connecting portable and/or fixed devices while maintaining high
level of security. Bluetooth is standardized as IEEE802.15 and operates in the 2.4 GHz range using RF
technology. Its data rates of up to 3Mbps.
M26 is fully compliant with Bluetooth specification 3.0. M26 supports profile including SPP and OPP.
The module provides a Bluetooth antenna pad named BT_ANT.
Table 28: Pin Definition of the BT_ANT
Pin Name
Pin No.
Description
BT_ANT
26
BT antenna pad
GND
27
Ground