Data Sheet

Smart Machine Smart Decision
SIM800F_Hardware Design_V1.00 48 2015-07-31
4.20.2 Bluetooth Antenna Interface
For Bluetooth antenna, it is recommended to reserve the matching circuit as following:
Figure 44: Bluetooth antenna matching circuit
R201, C201, C202 are the matching circuit, the values depend on antenna debug result. Normally R201 is 0,
C201 and C202 are not mounted.
There are some suggestions for placing components and RF trace for GSM_ANT/BT_ANT:
 The RF connector is used for conducted test, so keep it as close to pin GSM_ANT as possible
 Antenna matching circuit should be close to the antenna
 Keep the RF traces impedance as 50
 The RF traces should be kept far away from the high frequency signals and strong interference
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