Measuring UHF RFID Tag Reading for Document Localization

This study measured the reading reliability of UHFpassive tags for Document Tracking. The main goal was verifyingwhether UHF RFID technology that relaxes the constraints ofdistance reading with respect to HF, is suitable for automatingdocument workflow. A set of experiments was conducted usingthree types of commercial tags to verify how the reader?s powerand the spatial arrangement of tags may impact on the readingaccuracy. The tests involve both the simultaneous reading of astack of 50 tagged single-page documents (inventory mode) andthe retrieval of one of them. Results showed that while search fora single document is successful when carried out at a reasonabledistance (allowing the user to move naturally without distanceconstraints), inventory is only successful in close proximity.