Compact folded square‐loop antenna for reading near‐field RFID tags in blood sample tracking system. Issue 25 (1st December 2017)

• Record Type: Journal Article
• Authors: Lin, Y.F.; Liao, C.T.; Chen, H.M.; Jiang, Z.D.
• Is Part Of: Electronics letters. Volume 53:Issue 25(2017)
• Page Start: 1627
• Page End: 1628
• Publication Date: 2017-12-01
• Subjects: biomedical communication -- loop antennas -- UHF antennas -- radiofrequency identification; specimen containers -- button‐type RFID tag reading -- interrogation zone -- blood sample collection tubes -- resonant frequencies -- near‐field RF identification tag reading -- blood sample tracking system -- near‐field RFID tag reading -- compact dual‐band folded square‐loop antenna; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2017.1859
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.