Smart Module Series
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Table 43: Bluetooth Transmitting and Receiving Performance
5.3.3. Reference Design
A reference circuit design for Wi-Fi/Bluetooth antenna interface is shown as below. C1 and C2 are not
mounted and a 0
Ω resistor is mounted on R1 by default.
ANT_WIFI/BT
R1 0R
C1
Module
NM
C2
NM
Wi-Fi/Bluetooth
antenna
Figure 33: Reference Circuit Design for Wi-Fi/Bluetooth Antenna
5.4. Reference Design of RF Routing
For u
ser’s PCB, the characteristic impedance of all RF traces should be controlled as 50 Ω. The
impedance of the RF traces is usually dete
rmined by the trace width (W), the materials’ dielectric
constant, the distance between signal layer and reference ground (H), and the clearance between RF
trace and ground (S). Microstrip line or coplanar waveguide line is typically used in RF layout for
characteristic impedance control. The following are reference designs of microstrip line or coplanar
waveguide line with different PCB structures..
Transmitter Performance
Packet Types
DH5
2-DH5
3-DH5
Transmitting Power
7 ±2.5 dBm
6 ±2.5 dBm
6 ±2.5 dBm
Receiver Performance
Packet Types
DH5
2-DH5
3-DH5
Receiving Sensitivity
-91 dBm
-91 dBm
-85 dBm
