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FIBOCOM SC138-
NA
Series Hardware Guide
66/88
3.20.1
Circuit Reference Design
When using SC138 series modules, it is necessary to connect the antenna pins and the RF connector or
antenna feedpoint on the main board through the RF route. Microstrip line is recommended for the RF
route, the insertion loss is controlled within 0.2 dB, and the impedance is controlled within 50 Ω. A π-type
circuit is reserved between the module and the antenna connector (or feedpoint) for antenna
commissioning. Two parallel devices are directly jumped and connected to the RF route without branch.
The reference circuit is shown in the following figure:
Figure 3-25 TRX/DRX antenna reference circuit
3.21
WIFI/BT Antenna
Microstrip line is recommended for the RF routing of WIFI/BT antenna, the insertion loss is controlled
within 0.2 dB, and the impedance is controlled within 50 Ω.
Table 3-21 Definition of WIFI/BT antenna interface
Pin Name
Pin No.
I/O
Description
Remarks
ANT-WIFI/BT
78
I/O
WIFI/BT antenna interface
-
3.21.1
WIFI/BT Band
M odule
A N T_M A IN
A N T_D IV
0R
N C
N C
M ain_A ntenna
N C
0R
0R
N C
D iv_A ntenna
