Quectel SG368Z Series

Smart Module Series
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Table 40: Bluetooth Transmitting and Receiving Performance (Unit: dBm)
5.1.3. Reference Design
A reference design of Wi-Fi & Bluetooth antenna interface is shown as below. C1 and C2 are not mounted
by default. Only a 0 Ω resistor is mounted on R1.
ANT_RF
R1 0R
C1
Module
NM
C2
NM
Figure 30: Reference Design of Wi-Fi & Bluetooth Antenna
5.2. RF Routing Guidelines
When designing PCB, characteristic impedance of all RF traces should be controlled to 50 Ω. Generally,
the impedance of RF traces is determined by materials’ dielectric constant, trace width (W), space
between RF traces and grounds (S) and height from the reference ground to the signal layer (H).
Microstrip or coplanar waveguide is typically used in RF layout to control characteristic impedance. The
following are reference designs of microstrip or coplanar waveguide with different PCB structures when
characteristic impedance of RF traces is controlled to 50 Ω.
Transmitting Performance
Packet types
DH5
2-DH5
3-DH5
Transmitting power
6 ±3
4.5 ±3
4.5 ±3
Receiving Performance
Packet types
DH5
2-DH5
3-DH5
Receiving sensitivity
-89
-89
-83