10.3.2.2 Transmission Line Considerations
The RF signal from the module is routed to the antenna using a Coplanar Waveguide with ground (CPW-G)
structure. CPW-G structure offers the maximum amount of isolation and the best possible shielding to the
RF lines. In addition to the ground on the L1 layer, placing GND vias along the line also provides additional
shielding.
shows a cross section of the coplanar waveguide with the critical dimensions.
shows the top view of the coplanar waveguide with GND and via stitching.
Figure 10-3. Coplanar Waveguide (Cross Section)
S
W
Figure 10-4. CPW With GND and Via Stitching (Top View)
SWRS263A – FEBRUARY 2021 – REVISED JUNE 2022
54
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