Compact folded square‐loop antenna for reading near‐field RFID tags in blood sample tracking system | Zendy

Lin Y.F. | Zendy; Liao C.T. | Zendy; Chen H.M. | Zendy; Jiang Z.D. | Zendy

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Compact folded square‐loop antenna for reading near‐field RFID tags in blood sample tracking system

Author(s) -

Lin Y.F.,

Liao C.T.,

Chen H.M.,

Jiang Z.D.

Publication year - 2017

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

eISSN - 1350-911X

pISSN - 0013-5194

DOI - 10.1049/el.2017.1859

Subject(s) - tracking (education) , loop (graph theory) , loop antenna , antenna (radio) , square (algebra) , sample (material) , reading (process) , electronic engineering , electrical engineering , computer science , physics , engineering , antenna measurement , antenna factor , mathematics , psychology , pedagogy , geometry , combinatorics , political science , law , thermodynamics

A highly compact (25 × 25 × 0.8 mm 3 ) dual‐band folded square‐loop antenna is proposed for reading near‐field RF identification (RFID) tags. The antenna has a strong and uniform magnetic field in the near‐field zone of the square loop. The side length of the square loop (∼ λ /16) generates resonant frequencies in two conventional modes (0.5 λ and 1.0 λ ). Experimental interrogation of a small RFID button tag attached to a blood sample collection tube showed that the antenna has a small interrogation zone (15 × 15 mm 2 ), which avoids unnecessary interrogation. Experiments also showed that with an input power of 25 dBm, the antenna can tag at a distance of up to 40 mm, which confirmed its suitability for reading button‐type RFID tags attached to blood sample collection tubes and other specimen containers.

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