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5.3
Antenna patterns in the FCC frequency band
Directional radiation pattern FCC
The directional radiation pattern is shown for nominal alignment and a center frequency of
915 MHz.
Figure 5-7
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. Low deviations can therefore occur in a normally reflecting environment.
SIMATIC RF622A
Operating Instructions, 11/2020, C79000-G8976-C601-01
5.3 Antenna patterns in the FCC frequency band
Antenna patterns
21
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