Siemens SIMATIC RF610T ATEX System Manual page 282

Antennas
6.4 SIMATIC RF640A
Figure 6-26
282
Pattern of the vertical plane of the antenna
Pattern of the horizontal plane of the antenna
The RF640A directional radiation pattern in the ETSI frequency band, axis of symmetry
of the antenna, and polarization axis of the transponder are orthogonal to each other
System Manual, 06/2019, J31069-D0171-U001-A22-7618
SIMATIC RF600