5G Module Series
RM510Q-GL Hardware Design
RM510Q-GL_Hardware_Design 65 / 88
1. Keep the characteristic impedance for the trace of GNSS antenna (
ANT3_GNSSL1)
to 50
Ω.
2. Place the
π-type
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 two antenna traces.
5. Keep 15 dB isolation between each two antennas to improve the receiving sensitivity. and 20 dB
isolation between 5G NR UL MIMO T
RX0 and TRX1
antennas.
5.3.3. GNSS Performance
The following table shows GNSS performance of RM510Q-GL.
Table 41: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-148
dBm
Reacquisition
Autonomous
-159
dBm
Tracking
Autonomous
-159
dBm
TTFF
(GNSS)
Cold start
@ open sky
Autonomous
33.99
s
XTRA enabled
13.56
s
Warm start
@ open sky
Autonomous
22.55
s
XTRA enabled
2.02
s
Hot start
@ open sky
Autonomous
1.33
s
XTRA enabled
1.47
s
Accuracy
(GNSS)
CEP-50
Autonomous
@ open sky
1.8
m
NOTES
NOTES