Siemens SIMATIC RF600 Series System Manual page 247

6.5.6.2 Antenna patterns in the FCC frequency band
Antenna pattern FCC
The directional radiation pattern is shown for nominal alignment and a center frequency of
915 MHz.
Figure 6-33 Reference system
The half-power beam width of the antenna is defined by the angle between the two -3 dB
points (corresponding to half the power referred to the maximum power). 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
247