Quectel AF20 - Page 30

Wi-Fi&Bluetooth Module Series
AF20_Hardware_Design
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Figure 13: Microstrip Design on a 2-layer PCB
Figure 14: Coplanar Waveguide Design on a 2-layer PCB
Figure 15: Coplanar Waveguide Design on a 4-layer PCB (Layer 3 as Reference Ground)
Figure 16: Coplanar Waveguide Design on a 4-layer PCB (Layer 4 as Reference Ground)