LTE Router Installation | 57
Aprisa LTE User Manual 2.1
GNSS Antenna Requirements
Table 5 GNSS Antenna Requirements
Wide-band GNSS: 1559–1606 MHz recommended
Narrow-band GPS: 1575.42 MHz ±2 MHz minimum
Narrow-band Galileo: 1575.42 MHz ±2 MHz minimum
Narrow-band BeiDou: 1561.098 MHz ±2 MHz minimum
Narrow-band GLONASS: 1601.72 MHz ±4.2 MHz minimum
Narrow-band QZSS: 1575.42 MHz ±2 MHz minimum
Omni-directional in azimuth
-45° to +90° in elevation
Polarization
(average Gv/Gh)
> 0 dB (Vertical linear polarization is sufficient)
Gv and Gh are measured and averaged over -45° to +90° in elevation, and
±180° in azimuth.
Free space average gain
(Gv+Gh) over FOV
> -6 dBi (preferably > -3 dBi)
Maximum gain and uniform coverage in the high elevation angle and zenith.
Gain in azimuth plane is not desired.
Isolation between GNSS
and Ant1
> 10 dB in all uplink bands
Any other than LHCP (left-hand circular polarized) is acceptable
Where an active GNSS antenna is used, a +3.15 V d.c. supply at up to 100 mA
is available at the GNSS antenna port. This feature is enabled/disabled
through SuperVisor see ‘Active Antenna’ on page 92.
Wi-Fi Antenna Requirements
• Individual antenna gains must not exceed the values given for WLAN antennas in Table 3 Antenna
Compliance Requirements.
• The Wi-Fi antenna must be installed such that at least 20 cm is maintained between the antenna
and users.
• The required antenna impedance is 50 Ohms.
• To get maximum throughput when operating at MIMO 2x2, two antennas with at least 25 dB isolation
are recommended.
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