Rf Trace Reference - YUGE CLM920 TD3 Usage Manual

CLM920 TD3 LTE Module Hardware Usage Guide
 The antenna impedance traces need to be three-dimensionally packaged, and the ground
holes are added on both sides of the trace to isolate.

3.19.4 RF trace reference

For the user, the characteristic impedance of all RF signal lines should be controlled at
50Ω. The impedance of the RF signal line is determined by the dielectric constant of the
material, the trace width (W), the ground clearance (S), and the height of the reference ground
plane (H). Please use the impedance simulation tool to calculate the impedance value of the
RF trace. The control of the PCB characteristic impedance is usually in the form of microstrip
lines and coplanar waveguides.
Figure 3-32 The complete structure of the two-layer PCB microstrip line
Figure 3-33 The complete structure of the multilayer PCB strip line
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