Siemens SIMATIC RF615A, Руководство по эксплуатации

Страница: 18 / 34

Antenna patterns
6.2 Antenna pattern ETSI
SIMATIC RF615A
18
Operating Instructions, 09/2018, C79000-G8976-C511-01
6.2 Antenna pattern ETSI
Directional radiation pattern ETSI
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 6-4 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 24).
Note that the measurements presented graphically below were carried out in a low-reflection
environment. Deviations can therefore occur in a normally reflecting environment.