Specified Minimum And Maximum Spacing Of Antennas; Mutual Interference Of Readers (Antennas) - Siemens Simatic RF600 System Manual

4.3.4

Specified minimum and maximum spacing of antennas

Specified minimum spacing of antennas
The following diagram shows the specified minimum and maximum spacings for mounting
antennas:
Between the antenna and liquids or metals, a minimum distance of 50 cm should be kept to.
The distance between the antenna and the floor should also be at least 50 cm.
Figure 4-2
4.3.5

Mutual interference of readers (antennas)

Using more than one reader
When several RFID readers are used, there is a danger that RFID transponders can also be
read out by other readers. Care must therefore be taken to ensure that the transponder can
only be identified by the intended reader.
Technical disruptions between readers then occur particularly when they transmit on the
same channel (on the same frequency). You will find more detailed information in the section
"The response of electromagnetic waves in the UHF band (Page 73)".
To prevent this, readers used in Europe and China must operate on different channels with
"frequency hopping" activated. "Frequency hopping" is permanently set in the USA.
SIMATIC RF600
System Manual, xx/2014, J31069-D0171-U001-A15-7618
Minimum distance to the environment
RF600 system planning
4.3 Antenna configurations
49