User Guide

ME310G1 Hardware User Guide
1VV0301588 Rev. 4 Page 53 of 77 2020-01-21
GNSS Antenna Requirements
GNSS active antenna must be used or integrated in the application.
8.3.1. GNSS Antenna specification
Item
Value
Frequency range
1559.0 ~ 1610.0 MHz
Gain
20 ~ 30dB
Impedance
50 ohm
Noise Figure of LNA
< 1.5 (recommended)
DC supply voltage
DC 1.8 ~ 3.3V
VSWR
≤ 3:1 (recommended)
8.3.2. 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 evaluated carefully 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 like antenna lobes and gain.
8.3.3. Powering the External LNA (active antenna)
The LNA of active antenna needs a source of power because 1.8V or 3V DC voltage
needed by active antenna is not supplied by the ME310G1 module, but can be easily
included in the user application circuit.
The electrical characteristics of the GPS_LNA_EN signal are:
Level
Min
Max
Output High
Level
1.6V
1.9V
Output Low
Level
0V
0.3V