LEA-M8S / LEA-M8T - Hardware integration manual
UBX-15030060 - R06
Design
Page 15 of 33
Production information
Figure 7: Module design with passive antenna
Setup for best performance with passive antenna
Figure 8 shows a design using an external LNA to increase the sensitivity for best performance with
passive antenna.
Figure 8: Module design with passive antenna and an external LNA
The VCC_RF output can be used to supply the LNA with a filtered supply voltage.
☞
A standard GNSS LNA has enough bandwidth to amplify GPS / Galileo / GLONASS and BeiDou
signals.
2.4.2
Active antenna design
Active antennas have an integrated low-noise amplifier. Active antennas require a power supply that
will contribute to the total GNSS system power consumption budget with additional 5 to 20 mA
typically.
If the customers do not want to make use of the internal antenna supervisor and the supply voltage
of the LEA-M8S and LEA-M8T module matches the supply voltage of the antenna (for example, 3.0
