What is reader collision?

One problem encountered with RFID systems—mainly longer range UHF systems—is that the signal from one reader can interfere with the signal from another where coverage overlaps. This is called reader collision. Readers can use shielding, but this complicates deployments and makes them more expensive. The EPC Gen 2 standard includes something called “dense reader” mode to avoid reader collision. See below.

Posted in: RFID Readers