Siemens SIMATIC RF600 Series System Manual page 245

6.5.6.1 Antenna patterns in the ETSI frequency band
Directional radiation pattern
The directional radiation pattern is shown for nominal alignment and a center frequency of
866.3 MHz. The nominal antenna alignment is given when the antenna elevation is provided
as shown in the following figure.
Figure 6-31 Reference system
The half-power beam width of the antenna is defined by the angle between the two -3 dB
points. Which range (in %) corresponds to the dB values in the patterns can be obtained
from this table (Page 249).
Note that the measurements presented graphically below were carried out in a low-reflection
environment. Deviations can therefore occur in a normally reflecting environment.
SIMATIC RF600
System Manual, 10/2016, J31069-D0171-U001-A19-7618
Antennas
6.5 RF650A antenna
245