Texas Instruments CC3235MODASF, User Manual

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Figure 3-8 shows the top view of the coplanar waveguide with GND and via stitching.
S
W
Figure 3-8. CPW With GND and Via Stitching (Top View)
The recommended values for the PCB are provided for 2-layer boards in Table 3-2 and for 4-layer boards in
Table 3-3 .
Table 3-2. Recommended PCB Values for 2-Layer
Board (L1 to L2 = 42.1 mils)
PARAMETER VALUE UNIT
W 26 mils
S 5.5 mils
H 42.1 mils
Er (FR-4 substrate) 4.2 F/m
Table 3-3. Recommended PCB Values for 4-Layer
Board (L1 to L2 = 16 mils)
PARAMETER VALUE UNITS
W 21 mils
S 10 mils
H 16 mils
Er (FR-4 substrate) 4.5 F/m
www.ti.com Layout Guidelines
SWRU548C – FEBRUARY 2019 – REVISED SEPTEMBER 2021
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