Antenna Interface - SimCom SIM5360A EVB User Manual

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4.4 Antenna Interface

Figure 6: Main and diversity Antenna connector
Figure 7 :GPS Antenna connector
SIMCom strongly recommends additional matching components between the antenna and the RF
output of SIM5360 RF PAD (Main: pin 59; Diversity: PIN 82; GPS: pin 79; ) for the application
including an antenna.
Topology is a PI structure plus a serial element; components assume to be capacitors or inductors
depending on the antenna matching. But if the pad is 50 Ohms and is connected to 50 Ohms load,
the matching circuitry is not needed.
The RF connection should be short enough to minimize losses and must have a characteristic
impedance of 50 Ohms until F ≥ 2 GHz.
SIMCom strongly recommends the micro strip line can be used.
SIM5360A EVB User Guide 12 03.18.2014