FDTD simulation of SAW RFID tags

Author

Nova, Omar ; Pena, N. ; Ney, Michel

Author_Institution

Electr. & Electron. Eng. Dept., Univ. of Los Andes, Bogota, Colombia

fYear

2012

fDate

5-7 Nov. 2012

Firstpage

259

Lastpage

262

Abstract

FDTD simulation of a Surface Acoustic Wave (SAW) RFID tag is presented. The simulated tag consists of a single-electrode Inter-digital Transducer (IDT) with ten electrodes and three single-electrode reflectors, printed on the surface of a 128°YX Lithium Niobate (LiNbO₃) piezoelectric substrate. FDTD modeling is done considering the multyphisics nature of the problem, by combining the electromagnetic and the elastodynamics theory in order to obtain the piezoelectric governing equations. Simulation results allow determining the time-position and insertion loss of SAW echoes, which enables the determination of the ID code stored in the tag.

Keywords

elastodynamics; electromagnetic field theory; finite difference time-domain analysis; interdigital transducers; radiofrequency identification; surface acoustic wave transducers; FDTD simulation; ID code; IDT; LiNbO₃; SAW RFID tags; elastodynamics theory; electromagnetic theory; insertion loss; piezoelectric governing equations; piezoelectric substrate; single-electrode interdigital transducer; single-electrode reflectors; surface acoustic wave; time-position; Equations; Finite difference methods; Insertion loss; Mathematical model; Radiofrequency identification; Surface acoustic waves; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

RFID-Technologies and Applications (RFID-TA), 2012 IEEE International Conference on

Conference_Location

Nice

Print_ISBN

978-1-4673-4656-6

Electronic_ISBN

978-1-4673-4658-0

Type

conf

DOI

10.1109/RFID-TA.2012.6404525

Filename

6404525