Smart Machine Smart Decision
SIM7600NA_user manual _V1.00 51
2020-1-7
Figure35: Antenna matching circuit (MAIN_ANT)
In above figure, the components R1, C1, C2 and R2 are used for antenna matching, the values of
components can only be achieved after the antenna tuning and usually provided by antenna vendor.
By default, the R1, R2 are 0
Ω
resistors, and the C1, C2 are reserved for tuning. The component
D1 is a TVS for ESD protection, and it is optional for users according to application environment.
The RF test connector is used for the conducted RF performance test, and should be placed as close
as to the MODULE’s MAIN_ANT pin. The traces impedance between MODULE and antenna
must be controlled in 50
Ω
.
Figure 276: Antenna matching circuit (AUX_ANT)
In above figure, R3, C3, C4 and R4 are used for auxiliary antenna matching. By default, the R3, R4
are 0
Ω
resistors, and the C3, C4 are reserved for tuning. D2 is a TVS for ESD protection, and it is
optional for users according to application environment.
Two TVS are recommended in the table below.