5.4.2 Radiated Power Measurements
During the radiated measurements, the BRD2600A board was supplied through its USB connector by connecting to a PC through a
USB cable. The supply for the RF section (RFVDD) and the power amplifier (PAVDD) was 1.8 V provided by the on-chip DCDC con-
verter.
The RF output of the board was connected directly to a Spectrum Analyzer. The transceiver was operated in continuous carrier trans-
mission mode, and the output power was set to 14 dBm.
The board was rotated in three cuts. See the reference plane illustration in the figure below. The radiated powers of the fundamental
and the harmonics, and the antenna patterns at the fundamental frequencies were measured with horizontal and vertical reference an-
tenna polarizations.
Y
X
Z
Figure 5.4. DUT Reference Planes
5.4.2.1 Radiated Measurements in the 868 MHz Band
For the 868 MHz radiated power measurements, an external whip antenna (Chilisin BTEA0019130G8R2A01) was used as a transmitter
antenna. It was connected to the on-board SMA connector.
The measured radiated powers are shown in the table below.
Table 5.4. Maximums of the Measured Radiated Powers of BRD2600A
Frequency (868 MHz)
Measured Unmodulated
EIRP [dBm]
Orientation
Margin [dB]
Limit in EIRP [dBm]
Fund
13.6
XY/V
2.5
16.1
2nd
-47.8
XZ/H
19.9
-27.9
3rd
-41.4
YZ/H
13.5
-27.9
4th
-54.5
XY/V
26.6
-27.9
5th
-55.4
XY/V
27.5
-27.9
6th
-51.5
XY/V
23.6
-27.9
7th
-51.3
XY/V
23.4
-27.9
8th
-51.2
XY/V
23.3
-27.9
9th
-38.0
XZ/H
10.1
-27.9
10th
-46.8
XY/V
18.9
-27.9
As shown in the table above, with 14 dBm output power, the radiated power of the fundamental is compliant with the 16.1 dBm limit.
The radiated harmonic levels are compliant with large margins.
UG508: EFR32FG23 Dev Kit User's Guide
Radio
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