Gnss Frequency; Gnss Performance - Quectel 5G Module Series Hardware Design

5.2.2. GNSS Frequency

Table 35: GNSS Frequency
Type
GPS/Galileo/QZSS
Galileo
QZSS
GLONASS
BeiDou/COMPASS
NOTES
1. Keep the characteristic impedance for the trace of GNSS antenna
π-type
2. Place the matching components as close to the antenna as possible.
3. Keep the digital circuits, such as that of (U)SIM card, USB interface, camera module, display
connector and SD card, away from the antenna traces.
4. Keep 75 dB isolation between each antenna traces.
5. Keep 15 dB isolation between each antenna to improve the receiving sensitivity. and 20 dB isolation
between 5G NR UL MIMO

5.2.3. GNSS Performance

The following table shows GNSS performance of the module.
Table 36: GNSS Performance
Parameter Description
Cold start
Sensitivity
Reacquisition
(GNSS)
Tracking
TTFF Cold start
(GNSS) @ open sky
RM500Q-AE&RM502Q-AE_Hardware_Design
Frequency
1575.42 ± 1.023 (L1)
1575.42 ± 2.046 (E1)
1575.42 (L1)
1597.5–1605.8
1561.098 ± 2.046
TRX0 and TRX1 antennas.
Conditions
Autonomous
Autonomous
Autonomous
Autonomous
XTRA enabled
RM500Q-AE&RM502Q-AE Hardware Design
Unit
MHz
MHz
MHz
MHz
MHz
(ANT3_GNSSL1)
Typ.
-148
-159
-159
33.99
13.56
5G Module Series
to 50 Ω.
Unit
dBm
dBm
dBm
s
s
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