Title :
Calibration method for periodic surface based chipless tags
Author :
Costa, Francois ; Genovesi, Simone ; Monorchio, Agostino ; Manara, Giuliano
Author_Institution :
Dipt. Ing. dell´Inf., Univ. di Pisa, Pisa, Italy
Abstract :
The aim of this paper is to introduce a novel calibration method for chipless tags. The proposed tag is based on a periodic impedance surface with an asymmetric unit cell geometry. The method relies on a differential encoding of amplitude or phase of the reflected signal. The unit cell of the tag comprises several concentric loops of rectangular shape which exhibits a different response when interrogated along two orthogonal planes of incidence. The novel calibration procedure is also preliminary verified experimentally for a simple single bit tag configuration. This work opens the way to a more practical implementation of chipless tags reading.
Keywords :
frequency selective surfaces; periodic structures; radiofrequency identification; asymmetric unit cell geometry; calibration method; chipless RFID; frequency selective surfaces; high-impedance surfaces; periodic HIS surfaces; periodic impedance surface; periodic surface based chipless tags; rectangular shaped concentric loop; Calibration; Encoding; Phase measurement; Radiofrequency identification; Reflection coefficient; Resonant frequency; Surface impedance; Chipless RFID; High-Impedance Surfaces (HISs); RFID; differential encoding; frequency selective surfaces (FSSs);
Conference_Titel :
RFID Technology and Applications Conference (RFID-TA), 2014 IEEE
Conference_Location :
Tampere
DOI :
10.1109/RFID-TA.2014.6934204
