Antenna Radiation Patterns In The Fcc Frequency Band - Siemens SIMATIC RF610T ATEX System Manual

6 6 .4.6.2

Antenna radiation patterns in the FCC frequency band

Directional radiation pattern USA (FCC)
The directional radiation pattern is shown for nominal alignment and a center frequency of
915 MHz.
Figure 6-27 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 288).
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, 06/2019, J31069-D0171-U001-A22-7618
Antennas
6.4 SIMATIC RF640A
283