Siemens SIMATIC RF600 Series System Manual page 49

4.3.6 Read and write range
The read/write range between the reader/antenna and the transponder is influenced by the
following factors:
The reading range depends on
Transmit power of the reader
Transponder size and design
Absorption factor of the materials
Manufacturing quality of the tran-
sponders
Reflection characteristics of the envi-
ronment
Number of transponders in the antenna
field
You will find detailed information about the reading range of the individual readers in the
"Technical specifications" in the sections for the various readers.
SIMATIC RF600
System Manual, 10/2016, J31069-D0171-U001-A19-7618
Description
The higher the transmit power of the reader, the larger the
reading range.
The larger the transponder antenna, the larger the power
input area and therefore the larger the reading range.
The higher the absorption of the surrounding material, the
smaller the reading range.
The better the transponder has been matched to the oper-
ating frequencies during manufacturing, the greater the
reading range.
In a multiple-reflection environment (e.g., in rooms with
reflecting surfaces, machinery, or concrete walls), the read-
ing range can be significantly higher than in a low-reflection
environment.
The typical ranges always relate to a transponder installed
at the maximum possible distance from the antenna.
If there are several transponders located in the antenna
field, the distances to all other transponders must not ex-
ceed the maximum possible distance to be able to be de-
tected from the antenna field.
The width and height of the antenna field within which its
transponders can be arranged at a certain distance from
the antenna depend on the following:
The radiated power,
•
Only reading or reading and writing of the transponders
•
(writing requires more power, typically double the pow-
er)
The aperture angle (horizontal)
•
The aperture angle (vertical)
•
RF600 system planning
4.3 Antenna configurations
49