27
/
50
Table 15: GNSS Frequency
1.
An external LDO can be selected to supply power according to the active antenna requirement.
2.
If the module is designed with a passive antenna, then the VDD circuit is not needed.
3.8.4.
Antenna Installation
3.8.4.1.
Antenna Requirement
The following table shows the requirements on main antenna, Rx-diversity antenna and GNSS antenna.
Table 16: Antenna Requirements
Type
Requirements
GNSS
1)
Frequency range: 1561MHz ~ 1615MHz
Polarization: RHCP or linear
VSWR: < 2 (Typ.)
Passive antenna gain: > 0dBi
Active antenna noise figure: < 1.5dB
Active antenna gain: > 0dBi
Active antenna embedded LNA gain: < 17dB
WCDMA/LTE
VSWR: ≤ 2
Efficiency: > 30%
Max Input Power: 50W
Input Impedance: 50Ω
Cable insertion loss: < 1dB
(WCDMA B5/B6/B8/B19,
LTE B5/B8/B12/B13/B18/B19/B20/B26/B28/B29/)
Cable insertion loss: < 1.5dB
(WCDMA B1/B2/B3/B4/B9, LTE B1/B2/B3/B4/B21/B25/B66)
Cable insertion loss < 2dB
Type
Frequency
Unit
GPS/Galileo/QZSS
1575.42±1.023
MHz
GLONASS
1597.5~1605.8
MHz
BeiDou
1561.098±2.046
MHz
NOTES
