Project and Realization of a Wide-Range High-Frequency RFID Gate Allowing Omnidirectional Detection of Transponders

We describe the study and development of a 2-meter-wide HF RFID gate providing omnidirectional detection of transponders. Common commercial HF RFID gate structures provide a maximum reading range around 150 cm. Moreover, this value is in most cases guaranteed only for the maximum coupling direction, with lower values for the other 2 orientations. The proposed structure raises the value of the reading range up to 200 cm for every orientation of the transponder, with even better results (220 cm) when the transponder is in the position of maximum coupling. This result has been achieved through numerical simulations, focused on the study of the geometry of the antenna system and on the realization of the matching circuit and then confirmed with the physical implementation of the system.

[1]  Dennis Brown.  RFID Implementation , 2006 .

[2]  Christian Reinhold,et al.  Efficient Antenna Design of Inductive Coupled RFID-Systems with High Power Demand , 2007, J. Commun..

[3]  Klaus Finkenzeller,et al.  Book Reviews: RFID Handbook: Fundamentals and Applications in Contactless Smart Cards and Identification, 2nd ed. , 2004, ACM Queue.

[4]  C. Phongcharoenpanich,et al.  Design of flat spiral rectangular loop gate antenna for HF-RFID systems , 2008, 2008 Asia-Pacific Microwave Conference.

[5]  R. Bansal,et al.  Antenna theory , 1983, IEEE Antennas and Propagation Society Newsletter.

[6]  Bing Jiang,et al.  Energy Scavenging for Inductively Coupled Passive RFID Systems , 2005, IEEE Transactions on Instrumentation and Measurement.

[7]  Jagdish. M. Rathod,et al.  Low cost development of RFID antenna , 2009, 2009 Asia Pacific Microwave Conference.

[8]  C.M. Zierhofer,et al.  Geometric approach for coupling enhancement of magnetically coupled coils , 1996, IEEE Transactions on Biomedical Engineering.