Data Sheet
Table Of Contents
- 1 Design guidelines
- 2 Ordering Information
- 3 Pinout and Terminal Descriptions
- 4 Packaging
- 5 Power control
- 6 Interfaces
- 7 Block diagram
- 8 Example schematics
- 9 802.11 Radio
- 10 Firmware
- 11 Host interfaces
- 12 Electrical characteristics
- 13 RF Characteristics
- 14 Physical dimensions
- 15 Layout guidelines
- 16 Soldering recommendations
- 17 Certifications
- 18 Qualified Antenna Types for WF121-E
Silicon Labs
Page 45 of 45
18 Qualified Antenna Types for WF121-E
This device has been designed to operate with the antennas listed below, and having a maximum gain of 2.14
dB. Antennas not included in this list or having a gain greater than 2.14 dB are strictly prohibited for use with
this device. The required antenna impedance is 50 ohms.
Qualified Antenna Types for WT121-E
Antenna Type
Maximum Gain
Dipole
2.14 dBi
Table 25: Qualified Antenna Types for WF121-E
Any antenna that is of the same type and of equal or less directional gain as listed in Table 25 can be used
without a need for retesting. To reduce potential radio interference to other users, the antenna type and its
gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that
permitted for successful communication. Using an antenna of a different type or gain more than 2.14 dBi will
require additional testing for FCC, CE and IC. Please, contact support at http://www.silabs.com/
for more
information.