Open Platform Semi-passive RFID Tag

摘要

This paper presents the development of a prototype of a semi-passive Ultra-High Frequency (UHF) Radio Frequency Identification (RFID) tag that is compatible with the leading UHF RFID standard EPCGlobal Generation 2 Class 1. The design allows the addition of external analog and digital sensors and in that way the tag acts as a semi-passive wireless sensor node. A standard UHF RFID reader can acquire sensor data. The tag is designed as an open platform so that the firmware in the tag can be easily modified. Test results of our open platform semi-passive UHF RFID tag demonstrated that it can achieve a read rate above 50% when an open platform semi-passive UHF RFID tag is placed four meters from the reader antenna and the reader output power is set to 21 dBm.