BL600-Sx
Single Mode BLE Module
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www.lairdtech.com/bluetooth
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CONN-UM-BL600_v1_0
Use the same 50-Ohms track width. BL600-ST module RF_ANT pad width is 0.5mm. Land pad is also
0.5mm. Therefore 50-Ohm RF trace width may be 0.5mm width. If 50-Ohm trace is wider, then a
tapered section should be designed to gradually go from wider width to 0.5mm 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:
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Use the same PCB material (FR4)
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0.5 mm track width
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Use the same board L1 to L2 thickness (0.2032mm = 8Mil) for 50-Ohms impedance RF trace
design.
Place regular spaced through-hole GND vias (GCPW transmission line). BL600 development
board uses 0.5mm diameter through-hole GND via with 2 to 4mm distance apart. Gap between
RF_ANT trace and GND either side is 0.2 mm for below 50-Ohms impedance RF trace design.
Figure 12: BL600 development board PCB stack-up and L1 to L2 50-Ohms impedance RF trace design.
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