Hello all. I am trying to solve how to identifiy multiple tags located over a table, but not identifying other tags located around. So I am considering to place several antennas below the table and swicth the different antennas to identify all the RFIDs in the short distance. If I use an antenna with high gain it will be impossible to difference between the ones over the table and the ones around the table.
My first approach is to use the M6E nano board, capable to identify multiple tags, and use the external antenna plug but with the possibility to switch between different antennas.
Another option is to use different M6E boards with a short distance antenna, but this option increase a lot the cost.
Kind regards
Normally the M6E Nano detects mainly constant the tag that is closest to the antenna. The larger MercuryAPI from Jadak/ThingMagic has extended features that might interesting as well. It can enable GEN2 Tag Contention Settings: Q-algorithm and session. This can enable the detection of more tags that are in the RFID signal. The MercuryAPI can be installed on a Raspberry Pi.
I have never tried antenna switching. You could look at a https://community.libre.space/t/antenna … oject/2311 where they used a CX-120P coaxial relay. Another option could be https://www.jadaktech.com/product/thing … id-reader/
I expect that with multiple M6E boards, the signals will interfere quickly.
Thank you Paulvha!
I assumed that M6E could detect various tags without using specific libraries or specific operation, but as you has explained I will have to use the Mercury library.
The option of the Izar-4 seems good, it has integrate capability for 4 antennas.
Kind regards