N. V. Nederlandsche Apparatenfabriek NEDAP ADRRFRFID Manual Do Utilizador

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Manual iSense Lumen series

Field distribution for RFID

In contrary to RF, with RFID the field is side-dependent. This means that there are two antennas inside each

gate, pointing to opposite directions. If there is more than one gate in a group, there is a detection field in

between gates. This is the default mode of operation.

If you combine both RF and RFID in one system, we recommend to set RF to focused field. In this

way, the behaviour for both technologies is approximately the same.

If there is one gate in a group, it is not possible to make an aisle. To still have detection, you need to choose a

detection side of the gate. This can be either facing the previous gate or the next gate. This mode is mainly

used for small passageways, like with toilets.

Detection distance, aisle width and label-free zone

The next step after understanding the field distribution, is understanding how many gates you need. This

depends on the detection distance (or aisle width) of the system. There is no fixed answer to this question, it

depends on many factors, like customer expectation, quality of the tags, the environment, etc.

The recommendations below are based on the Nedap NT4040 (reference label) for RF, and the Nedap RFID

hard tag (for RFID).