Increasing The Probability Of Identification For Tags - Antenna Switching - Siemens SIMATIC RF600 System Manual

4.2.7

Increasing the probability of identification for tags - Antenna switching

To achieve a high probability of reading tags, the antenna switching function has been
implemented in the RF600R reader:
At a given time, the system transmits on one antenna and receives on the other antennas.
As long as the antenna is receiving signals from further tags, the system continues to
transmit on the same transmit antenna until all responding tags have been identified.
Subsequently, or if no tags respond, the system activates another antenna as the transmit
antenna. After all the antenna have transmitted at least once, or when the settling time is
excessively long, the reader activates frequency hopping (in the USA) or channel selection
(in Europe).
Cycle 1
Antenna 1 transmits
Antenna 2 and 3 receive
RF600
System Manual, 09/2005 Edition, J31069 D0171-U001-A0-7618,
Cycle 2
Antenna 2 transmits
Antenna 1 and 3 receive
RF600 system planning
4.2 Antenna configurations
Cycle 3
Antenna 3 transmits
Antenna 1 and 2 receive
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