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WE865-DUAL HW User Guide
1vv0300787
Rev. 1 - 03/10/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 26 of 48
7 Antenna
The antenna connection and board layout design are the most important part in the full product design
and they strongly reflect on the product overall performances, hence read carefully and follow the
requirements and the guidelines for a proper design.
7.1 Wi-Fi antenna guidelines
General guidelines for an antenna and antenna line on PCB for a Telit WE865-DUAL device
ANTENNA REQUIREMENTS
Frequency range [MHz]
2400-2500
Gain [dBi]
≤
2
Impedance [Ohm]
50
Maximum Input Power [mW]
>100
VSWR recommended
≤
2
Table 12
Frequency range indicated in order to support 14 Wi-Fi channels. Smaller ranges are allowed or
requested for application over 11 or 13 channels.
Please refer to IEEE specifications and to the proper regulatory body directives about 802.11
channels and antenna specifications in different countries.
When using the Telit WE865-DUAL, since there's no antenna connector on the module, the antenna
must be connected to the WE865-DUAL through the PCB with the antenna pad.
Please consider that antenna design and choice is dependent on the specific application.