Telit Wireless Solutions ME910G1 - GNSS Antenna Requirements; GNSS Antenna Specification; GNSS Antenna - Installation Guidelines; Powering the External LNA (Active Antenna)

ME910G1 Hardware Design Guide
1VV0301593 Rev.12 Page 62 of 93 2021-09-24
Not Subject to NDA
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 32: GNSS Antenna specification
GNSS Antenna – Installation Guidelines
• The antenna must be installed according to the antenna manufacturer’s instructions
for maximum performance of the GNSS receiver.
• The position of the antenna must be carefully evaluated when 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 active antenna LNA needs a power source because the 1.8V or 3V DC voltage required
by the active antenna is not provided by the ME910G1 module, but can easily be included
by the host design.
Note: In the case of a GNSS antenna placed near the module, a gain
of 15dB is sufficient, in the case of long cable the gain must be
increased up to 30dB.