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P r o o f W e b V e r s i o nAbstract-One challenge for UHF RFID passive tag design is to obtain a low-profile antenna that minimizes the influence of nearbody or attached objects without sacrificing both read range and universal UHF RFID band interoperability. A new improved design of a RFID passive tag antenna is presented that performs well near problematic surfaces (human body, liquids, metals) across most of the universal UHF RFID (840-960 MHz) band. The antenna is based on a low-profile printed configuration with slots, and it is evaluated through extensive simulations and experimental tests.Index Terms-Broadband, passive tag antenna, person identification, radio frequency identification (RFID).

A new improved design of a RFID passive tag antenna is presented for patient identification that is operable in the full UHF RFID (860-960 MHz) band. The antenna is based on a low profile printed solution and can be placed near the human body without sacrificing reading range. Extensive numerical simulations were performed and demonstrate that the new proposed configuration improves in relation to previous known solutions for near-body or other problematic surfaces.