Siemens SIMATIC RF600 System Manual page 159

Power rating
Definition
The power rating is understood as the maximum power defined by the vendor with which the
device may be operated.
Specifications
Third-party antennas must be dimensioned for an effective power applied to the antenna
connection of at least 4 Watt.
Polarization
Definition
The polarization parameter describes how the electromagnetic wave is radiated by the
antenna. A distinction is made between linear and circular polarization. With linear
polarization, a further distinction is made between vertical and horizontal polarization.
Specifications
UHF transponders usually have a receive characteristic similar to that of a dipole antenna
which is linearly polarized. Horizontal or vertical polarization is then present depending on
the transponder mounting.
SIMATIC RF600
System Manual, 10/2009, J31069-D0171-U001-A8-7618
6.2 Guidelines for selecting RFID UHF antennas
Antennas
159