User Guide

ME910G1 HW Design Guide
1VV0301593 Rev.7 Page 66 of 98 2021-02-02
GNSS Antenna Requirements
GNSS active antenna must be used or integrated in the application.
GNSS Antenna specification
Item
Value
Frequency range
1559.0 ~ 1610.0 MHz
Gain
15 ~ 30dB
Impedance
50 ohm
Noise Figure of LNA
< 1.5 (recommended)
DC supply voltage
DC 1.8 ~ 3.3V
VSWR
≤ 3:1 (recommended)
Table 30: GNSS Antenna specification
GNSS Antenna – Installation Guidelines
• The antenna must be installed according to the antenna manufacturer’s instructions
to obtain the maximum performance of GNSS receiver.
• The antenna location must be carefully evaluated if operating in conjunction with any
other antenna or transmitter.
• The antenna must not be installed inside metal cases or near any obstacle that may
degrade features such as antenna lobes and gain.
Powering the External LNA (active antenna)
The LNA of active antenna needs a power source because 1.8V or 3V DC voltage required
by the active antenna is not supplied by the ME910G1 module but can be easily included
by the host design.
Note: In case of GNSS antenna placed close to module 15dB gain is
enough, in case of long cable the gain has to be increased up to 30dB.