An 8-bit UHF RFID tag for passive sensing applications

This paper presents a passive UHF RFID tag consisting of a single dipole antenna matched to multiple RFID devices, where each is programmed with a unique binary weighting in its EPC register. With each device having its own digital input this results in a single tag capable of binary counting or a tag with multiple inputs. Measurement results and associated reader software demonstrate a proof of concept for an 8-bit version of the tag.