User's Manual

Wi-Fi&Bluetooth Module Series
FC41D_Hardware_Design
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of the RF traces is usually determined by the trace width (W), the material’s dielectric constant, the height
from the reference ground to the signal layer (H), and the spacing between RF traces and grounds (S).
The microstrip or coplanar waveguide is typically used in RF layout to control characteristic impedance.
The following are reference designs for microstrip or coplanar waveguide transmission lines with different
PCB structures.
Figure 13: Microstrip Design on a 2-layer PCB
Figure 14: Coplanar Waveguide Design on a 2-layer PCB
Figure 15: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground)