ME310G1 Hardware Design Guide
1VV0301588 Rev. 12
Page 59 of 96
2021-06-14
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 37: 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 the 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 requires a power source because the 1.8V or 3V DC voltage
required by the active antenna is not supplied by the ME310G1 module, but can be easily
included in the user application circuit.
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.
