Quectel BC66 Hardware Design page 38

Figure 25: Coplanar Waveguide Line Design on a 2-layer PCB
Figure 26: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 3 as Reference Ground)
Figure 27: Coplanar Waveguide Line Design on a 4-layer PCB (Layer 4 as Reference Ground)
In order to ensure RF performance and reliability, the following principles should be complied with in RF
layout design:
BC66_Hardware_Design
NB-IoT Module Series
BC66 Hardware Design
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