Smart LTE Module Series
SC600Y&SC600T Hardware Design
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6.1.2. Reference Design of RF Layout
For user’s PCB
, the characteristic impedance of all RF traces should be controlled to
50Ω.
The
impedance of the RF traces is usually determined by the trace width (W), the
materials’ dielectric
constant,
the height from the reference ground to the signal layer (H), and the clearance between RF traces and
grounds (S). 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.
Figure 34: Microstrip Design on a 2-layer PCB
Figure 35: Coplanar Waveguide Design on a 2-layer PCB
