MeiG Smart product technical information
SLM500
Hardware Design Guide
Page 54
If there are fewer components between the antenna and the module output, or if the RF test
head is not needed in the design, the antenna matching circuit can be simplified as shown
below:
Figure 4.37: DRX Antenna Interface Simplified Connection Circuit
In the above figure, R102 defaults to 0R, C103 and C104 are not attached by default.
4.18.3 GPS Antenna
The module provides the GNSS antenna pin RF_GPS. The antenna on the user's main board
should be connected to the antenna pin of the module using a 50-ohm characteristic microstrip
line or strip line.
The LNA is integrated inside the module.
To improve GNSS reception performance, customers can use external active antennas. The
recommended circuit connections are as follows:
Figure 4.38: Connecting Active Antennas
