CC3000MOD Datasheet, PDF (13/16 Pages) Texas Instruments – TI SimpleLink CC3000 Module . Wi-Fi 802.11b/g Network Processor

CC3000MOD
www.ti.com
SWRS126 – NOVEMBER 2012
DESIGN RECOMMENDATIONS
This section describes the layout recommendations for the CC3000 module, RF trace, and antenna.
Antenna
The ACX ceramic antenna is mounted on the CC3000 EVM board with a specific layout and matching circuit for
the radiation test conducted in FCC, CE and IC certifications. Figure 10 shows the location of the antenna on the
EVM board as well as the RF trace routing from the CC3000 module.
Via stitching
beside RF
trace
Antenna on
the edge
of PCB
No trace and
ground under
antenna section
Constant
impedance for
RF trace
Top layer
No sharp
corner
Bottom layer
Figure 10. RF Trace and Antenna Design for PCB Layout
SWRS126-015
Module Layout Recommendations
Observe the following module layout recommendations (see also Figure 11):
• 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.
• Signal traces can be run on a third layer under the solid ground layer and beneath the module mounting
layer.
Copyright © 2012, Texas Instruments Incorporated
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