BRD4100A Datasheet, PDF (5/17 Pages) Silicon Laboratories – Transmit power: 10.5 dBm

BRD4100A Reference Manual
Radio Board Block Summary
3.3.5 Inverted-F Antenna
The BRD4100A Radio Board includes a printed Inverted-F antenna (IFA) tuned to have close to 50 Ohm impedance at the 2.4 GHz
band.
For detailed description of the antenna see Chapter 4.5 Inverted-F Antenna.
3.3.6 UFL Connector
To be able to perform conducted measurements, Silicon Labs added an UFL connector to the Radio Board. The connector allows an
external 50 Ohm cable or antenna to be connected during design verification or testing.
Note: By default the output of the matching network is connected to the printed Inverted-F antenna by a series component. It can be
connected to the UFL connector as well through a series 0 Ohm resistor which is not mounted by default. For conducted measurements
through the UFL connector the series component to the antenna should be removed and the 0 Ohm resistor should be mounted (see
Chapter 4.2 Schematic of the RF Matching Network for further details).
3.3.7 Radio Board Connectors
Two dual-row, 0.05” pitch polarized connectors make up the EFR32BG Radio Board interface to the Wireless Starter Kit Mainboard.
For more information on the pin mapping between the EFR32BG1P232F256GM48 and the Radio Board Connector, refer to Chapter
2.2 Radio Board Connector Pin Associations.
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