BL600-Sx Hardware Integration Guide
Single Mode BLE Module
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CONN-HIG-BL600
6.4
50-Ohms RF trace on Host PCB for BL600-ST
Checklist (for PCB):
RF_ANT pin (pin30) is on the BL600-ST module only. You MUST use a 50-Ohm trace from RF_ANT pin to
RSMA RF antenna connector on host PCB.
shows the 10 mm length 50-Ohms RF trace (implemented as GCPW) from the BL600-ST module RF
trace pads (GND, RF_ANT, GND) on BL600 development board.
Figure 11: 50-Ohm trace design on BL600 development board (or host PCB) for use with BL600-ST module.
To ensure compliance, observe the following considerations for 50-Ohms RF trace design and test verification:
Follow the 50-Ohms trace design used on the BL600 development board (PCB stack-up in
). If
this PCB-stack-up is not practical on customer design then design 50-Ohms for differing PCB stack-up.
Use the same PCB material (FR4)
The 50-Ohms trace should be a controlled-impedance trace e.g.
±
10%.
The 50-Ohms RF trace length should be 10 mm (recommended) as on the BL600 development board to
reduce the trace length.
Use the same 50-Ohm track width. BL600-ST module RF_ANT pad and land pad widths are 0.5 mm.
Therefore 50-Ohm RF trace width may be 0.5 mm width. If 50-Ohm trace is wider, a tapered section
should be designed to gradually go from wider width to 0.5 mm RF_ANT (land pad) width.
Place GND vias regularly spaced either side of 50-Ohms trace to form GCPW (Grounded coplanar
waveguide) transmission line.
Use spectrum analyser to confirm the radiated (and conducted) signal is within the certification limit.
To copy the BL600 development board 50-Ohms RF trace:
Use the same PCB material (FR4)
0.5 mm track width
Use the same board L1 to L2 thickness (0.2032 mm = 8Mil) for 50-Ohms impedance RF trace design.
BL600-ST module
Pin30 RF_ANT trace
pad.
