SIMATIC RF640A
J31069-D0225-U001-A
2
-7618, 1
2
/2010
7
Antenna patterns
Antenna radiation patterns in the ETSI frequency band
Directional radiation pattern Europe (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.
;
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=
;
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=
r
r
r
r
r
r
Figure 2
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 13).
Note that the measurements presented graphically below were carried out in a low-reflection environment. Deviations can
therefore occur in a normally reflecting environment.
