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SWRS224A – FEBRUARY 2019 – REVISED AUGUST 2019
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Applications, Implementation, and Layout
Copyright © 2019, Texas Instruments Incorporated
7.3.2.2
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 7-6. Coplanar Waveguide (Cross Section)
Figure 7-7. CPW With GND and Via Stitching (Top View)