Wifi/Bt Antenna - Sunsea AIoT SIMCom SIM5800 Hardware Design

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:
ANT_WIFI/BT
Module
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.
SIM5800_Hardware Design_V1.01
Smart Machine Smart Decision
RF connector
(optional)
GND
76
77
GND 78
Figure 39: WiFI/BT antenna recommended circuit
Matching circuit
R1
C1 C2
44
WIFI/BT_ ANT
2018-10-08