Quectel NB-IoT Module Series Hardware Design page 36

NB-IoT Module Series
BC66 Hardware Design
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Figure 22: Microstrip Line Design on a 2-layer PCB
Figure 23: Coplanar Waveguide Line Design on a 2-layer PCB
Figure 24: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 3 as Reference Ground)
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