CC2564MODN Datasheet, PDF (33/62 Pages) Texas Instruments – Bluetooth Host Controller Interface (HCI) Module

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CC2564MODN, CC2564MODA
SWRS160D – FEBRUARY 2014 – REVISED DECEMBER 2015
Figure 6-5. Good (OK) vs Not Good (NG) RF Path
Figure 6-6. Not Recommended vs Recommended Trace Bends
6.2.1.3 Antenna
6.2.1.3.1 CC2564MODN Antenna
The CC2564MODN module must be used with the approved external chip antenna (LTA-5320-2G4S3-A)
and must comply with the following guidelines to preserve the modular radio certification (see Figure 6-7).
• Antenna clearance area = 15 mm × 8 mm
• Antenna solder termination to board edge length = 186 mils
• Antenna feed point to right side ground length = 140 mils
• Antenna feed point to last component trace = 244 mils
• Antenna pads to inside ground length = 208 mils
• An inductor L1 = 9.1 nH is required to properly match the chip antenna.
In addition, follow these general recommendations for a proper design with any antenna:
• Place the matching circuit as close as possible to the antenna feed point.
• Do not place traces or ground under the antenna section.
• Place the antenna, RF traces, and modules on the edge of the PCB product. In addition, consider the
proximity of the antenna to the enclosure and consider the enclosure material.
Copyright © 2014–2015, Texas Instruments Incorporated
Applications, Implementation, and Layout
33
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