Smart Machine Smart Decision
SIM800_Hardware Design_V1.10 50 2018-08-13
Table 34: Recommendation of ESD component
0201 LXES03AAA1-154 MuRata
0402 LXES15AAA1-153 MuRata
4.20.2. Bluetooth Antenna Interface
The module provides a Bluetooth antenna interface named BT_ANT to connect a Bluetooth antenna.
The Bluetooth antenna must be matched properly to achieve best performance, so the matching circuit is
necessary, the connection is recommended as the following figure:
Module
BT
_ANT
(
Pin 53)
GND
(Pin
54
)
R
201
C201
C
202
BT
Antenna
Figure 48: Bluetooth antenna matching circuit
R201, C201, C202 are the matching circuit, the values depend on antenna debug result. Normally R201 is 0Ω,
C201 and C202 are not mounted.
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