LPM2100 mg NB Module Hardware User Guide
Shanghai Yuge Information Technology Co., Ltd.
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4.3 RF signal line routing guide
For the user, the characteristic impedance of all RF signal lines should be controlled at
50
Ω
. 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 4-3 Complete structure of the microstrip line
Figure 4-4 Reference ground is the third layer microstrip transmission line structure
Figure 4-5 Complete structure of the strip line
