Siemens SIMATIC RF662A Manuale di istruzioni per l'uso - Pagina 20

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Antenna patterns

5.3 Antenna patterns in the FCC frequency band

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 5-4

Reference system

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 in relation 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 22)".

Note that the measurements presented graphically below were carried out in a low-reflection

environment. Deviations can therefore occur in a normally reflecting environment.

Operating Instructions, 12/2022, C79000-G8976-C684-01

SIMATIC RF662A