Use the following RF layout recommendations for the CC3235MODx module:
• 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.
For optimal RF performance, ensure the copper cut out on the top layer under the RF-BG pin (pin 31) is as
shown in
Copyright © 2017, Texas Instruments Incorporated
Figure 3-6. Top Layer Copper Pullback on RF Pads
Layout Guidelines
SWRU548C – FEBRUARY 2019 – REVISED SEPTEMBER 2021
CC3235MODSF SimpleLink™ Wi-Fi
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and IoT Solution With MCU
LaunchPad™ Hardware
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Summary of Contents for CC3235MODASF
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