Data Sheet

Table Of Contents
TI Confidential NDA Restrictions
ADVANCEINFORMATION
53
CC3135MOD
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SWRS225A FEBRUARY 2019REVISED AUGUST 2019
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Applications, Implementation, and LayoutCopyright © 2019, Texas Instruments Incorporated
7.2.3 Antenna Placement and Routing
The antenna is the element used to convert the guided waves on the PCB traces to the free space
electromagnetic radiation. The placement and layout of the antenna are the keys to increased range and
data rates. Table 7-2 provides a summary of the recommended antennas to use with the CC3135MOD
module.
Table 7-2. Antenna Guidelines
SR NO. GUIDELINES
1 Place the antenna on an edge or corner of the PCB.
2
Ensure that no signals are routed across the antenna elements on all the layers of the
PCB.
3
Most antennas, including the chip antenna used on the booster pack, require ground
clearance on all the layers of the PCB. Ensure that the ground is cleared on inner layers
as well.
4
Ensure that there is provision to place matching components for the antenna. These must
be tuned for best return loss when the complete board is assembled. Any plastics or
casing must also be mounted while tuning the antenna because this can impact the
impedance.
5
Ensure that the antenna impedance is 50 Ω because the device is rated to work only with
a 50-Ω system.
6
In case of printed antenna, ensure that the simulation is performed with the solder mask
in consideration.
7 Ensure that the antenna has a near omni-directional pattern.
8
The feed point of the antenna is required to be grounded. Refer to the specific antenna
data sheets for the recommendations.
Table 7-3 lists the recommended antennas to use with the CC3135MOD module. Other antennas may be
available for use with the CC3135MOD module. Please see the CC3135MOD OEM Integrator's Guide for
the full list of supported antennas.
Table 7-3. Recommended Components
CHOICE PART NUMBER MANUFACTURER NOTES
1 M830520 Ethertronics
Can be placed at the edge of the PCB using the
least amount of PCB area.