7.2 Radiated Power Measurements
During measurements, the BRD4174B Radio Board was attached to a Wireless Starter Kit Mainboard which was supplied by USB. The
voltage supply for the Radio Board was 3.3 V. The radiated power was measured in an antenna chamber by rotating the board 360 de-
grees with horizontal and vertical reference antenna polarizations in the XY, XZ, and YZ cuts. The measurement planes are illustrated
in the figure below.
Figure 7.3. Illustration of Reference Planes with a Radio Board Plugged into the Wireless Starter Kit Mainboard
Note:
The radiated measurement results presented in this document were recorded in an unlicensed antenna chamber. Also, the radi-
ated power levels may change depending on the actual application (PCB size, used antenna, and so on). Therefore, the absolute levels
and margins of the final application are recommended to be verified in a licensed EMC testhouse.
BRD4174B Reference Manual
RF Performance
silabs.com
| Building a more connected world.
Rev. 1.00 | 16
