Antenna Guidelines; Recommended Components; Characteristic Of Recommended Antenna - Texas Instruments CC3100 SimpleLink Wi-Fi User Manual

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5.1.1 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 is key to increased range and data
rates.
The guidelines in Table 4
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 BoosterPack, require ground clearance on all the layers of the
PCB. Ensure that the ground is cleared on the 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
once the complete board is assembled.
Any plastics or casing should also be mounted while tuning the antenna, as this can impact the impedance.
5 Ensure that the antenna impedance is 50 Ω, as 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 return loss measured at the filter out (looking into the device) should be better than -10 dB. To ease the FCC, CE, and
ETSI certification, the antenna used should be of the same gain or lesser.
Choice Part Number
1 AH316M245001-T
2 RFANT5220110A2T
Frequency bandwidth
Average gain at OMNI plane
5.1.2 Filter Placement and Routing
The RF filter used on the board performs the important function of attenuating the out-of-band emissions
from the device. The recommended filter is DEA202450BT-1294C1. The datasheet for the filter can be
accessed at http://www.tdk.co.jp/tefe02/rf_bpf_dea202450bt-1294c1-h_en.pdf.
SWRU370B – June 2014 – Revised August 2018
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must be observed for the antenna.
Table 4. Antenna Guidelines
Table 5. Recommended Components
Manufacturer
Taiyo Yuden
Walsim
Table 6. Characteristic of Recommended Antenna
Parameter
Typical peak gain
Efficiency (typical)
VSWR
CC3100 and CC3200 SimpleLink™ Wi-Fi
Copyright © 2014–2018, Texas Instruments Incorporated
Notes
Can be placed on the edge of the PCB and uses less PCB space
Must be placed on the corner of the PCB
2.4G to 2.5G
–1.3 dB (73%)
®
and Internet of Things Solution
Layout Guidelines
Spec
+1.9 dBi
0 dBi
3
Layout Guidelines
13