User's Manual

SIM5320J Document
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To facilitate the antenna tuning and certification test, a RF connector and an antenna matching circuit should be
added. The following figure is the recommended circuit.
Figure1: antenna matching circuit
In this figure, the components L101,C101,C102 is used for antenna matching, the value of components can only
be got after the antenna tuning, usually, they are provided by antenna vendor. By default, the L101 is 0 ohm
resistors, and the C101, C102 are reserved for tuning.
The RF test connector in the figure is used for the conducted RF performance test, and should be placed as close
as to the module’s antenna pin. The traces impedance between components must be controlled in 50ohm.