Siemens 6GT2812-2EA00, Руководство по эксплуатации

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Antenna patterns
5.2 Antenna patterns in the ETSI frequency band
SIMATIC RF622A
18
Operating Instructions, 11/2020, C79000-G8976-C601-01
5.2 Antenna patterns in the ETSI frequency band
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 5-4 Alignment and reference system of the antenna
The half-power beamwidth of the antenna (opening angle) is defined by the angle between
the two -3 dB points (corresponding to half the power referred to the maximum power). The
range (in %) corresponding to the dB values in the patterns can be obtained from the table in
the section "Interpretation of directional radiation patterns (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.