CC3220MOD_17 Datasheet, PDF (70/88 Pages) Texas Instruments – SimpleLink Wi-Fi CERTIFIED Wireless Module Solutions (S and SF)

CC3220MOD
SWRS206A – MARCH 2017 – REVISED JUNE 2017
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7.3.1 General Layout Recommendations
Ensure that the following general layout recommendations are followed:
• Have a solid ground plane and ground vias under the module for stable system and thermal
dissipation.
• Do not run signal traces underneath the module on a layer where the module is mounted.
• RF traces must have 50-Ω impedance.
• RF trace bends must be made with gradual curves, and 90 degree bends must be avoided.
• RF traces must not have sharp corners.
• There must be no traces or ground under the antenna section.
• RF traces must have via stitching on the ground plane beside the RF trace on both sides.
• RF traces must be as short as possible. The antenna, RF traces, and the module must be on the edge
of the PCB product in consideration of the product enclosure material and proximity.
7.3.2 RF Layout Recommendations
The RF section of this wireless module gets top priority in terms of layout. It is very important for the RF
section to be laid out correctly to ensure optimum performance from the module. A poor layout can cause
low-output power, EVM degradation, sensitivity degradation, and mask violations.
Figure 7-2 shows the RF placement and routing of the CC3220MODx module.
Figure 7-2. RF Section Layout
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Applications, Implementation, and Layout
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