Siemens SIMATIC RF680R - Page 188

Readers
5.5 SIMATIC RF685R
SIMATIC RF600
188 System Manual, 11/2018, J31069-D0171-U001-A21-7618
Radiation diagram (circular)
Figure 5-42 Circular section
Overview of the antenna parameters
Table 5- 42 Maximum linear electrical aperture angle at 915 MHz:
Polarization
Circular polariza-
tion
Linear vertical
Linear horizontal
Azimuth section
74°
64°
73°
Elevation section
70°
78°
68°
Typical antenna gain
in the frequency band 902 to 928 MHz
5 dBi 3 dBi 5 dBi
Antenna axis ratio
--
--
2 dB
You will find more information on the antennas in the section "Guidelines for selecting RFID
UHF antennas (Page 51)".