Siemens SIMATIC RF600 Series System Manual page 192

Antennas
6.2 RF620A antenna
6.2.6.3 Antenna pattern FCC
Directional radiation pattern USA (FCC)
The directional radiation pattern is shown for nominal alignment and a center frequency of
915 MHz.
Figure 6-8 Reference system
The half-power beamwidth 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 .
Note that the measurements presented graphically below were carried out in a low-reflection
environment. Low deviations can therefore occur in a normally reflecting environment.
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System Manual, 10/2016, J31069-D0171-U001-A19-7618
SIMATIC RF600