Specifications

Smart Machine Smart Decision
SIM5800_Hardware Design_V1.01 44 2018-10-08
according to antenna characteristic; C1 is used for DC blocking and its value is 33pF by default; the RF connector
is used to ensure the accuracy and convenience of the conduction testing, if considering LOW-Cost BOM, users
can cancel it.
4.19.3 WIFI/BT antenna
The recommended circuit is shown as Figure 39:
RF connector
(optional)
C1
Module
77
ANT_WIFI/BT
GND
C2
78
R1
Matching circuit
WIFI/BT_ ANT
76
GND
Figure 39: WiFI/BT antenna recommended circuit
R1, C1 and C2 are antenna matching components in , the value of these components are determined according to
the antenna tuning results. By default, R1 is 0Ω, C1 and C2 are reserved. The RF connector is used to ensure the
accuracy and convenience of the conduction testing, so SIMCOM suggest keeping it. If considering Low-Cost
BOM, user can cancel the connector.