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| CC3120MOD Datasheet, PDF (39/52 Pages) Texas Instruments – SimpleLink Wi-Fi CERTIFIED Network Processor Internet-of-Things Module Solution for MCU Applications | |||
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CC3120MOD
SWRS205 â MARCH 2017
7.2.4 Transmission Line Considerations
The RF signal from the device 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. Figure 7-4 shows a cross section of the coplanar waveguide with the critical
dimensions.
Figure 7-4. Coplanar Waveguide (Cross Section)
Figure 7-5 shows the top view of the coplanar waveguide with GND and via stitching.
S
W
Figure 7-5. CPW With GND and Via Stitching (Top View)
Copyright © 2017, Texas Instruments Incorporated
Applications, Implementation, and Layout
39
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