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International Journal of Antennas and Propagation
Volume 2016 (2016), Article ID 4715898, 6 pages
http://dx.doi.org/10.1155/2016/4715898
Research Article

Far-Field Testing Method of Spurious Emission Produced by HF RFID

1Christian Doppler Lab for Sustainable Mobility, Institute of Telecommunications, Vienna University of Technology, Gusshausstrasse 25/E389, 1040 Vienna, Austria
2NXP Semiconductors Austria GmbH, Mikronweg 1, 8101 Gratkorn, Austria

Received 22 December 2015; Revised 4 March 2016; Accepted 24 April 2016

Academic Editor: Ji-Woong Choi

Copyright © 2016 Nikola Gvozdenovic et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present measurements of spurious emission produced by high-frequency radio frequency identification (HF RFID) using carrier frequency of 13.56 MHz. HF RFID tags produce unwanted emission due to rectification and more generally due to nonlinearity of analog front end. Depending on the conducting material of an HF RFID coil and surrounding dielectric material, the coil behaves as more or less good antenna on some harmonic frequencies. Exact characterization and analysis of unwanted emission is important from the security perspective as well as from the perspective of interference with other systems. Consequently we measured the harmonics produced in the integrated circuitry and characterized radiation properties of the antenna. Finally we present the measurements of the spurious emission performed in a Gigahertz Transverse Electromagnetic (GTEM) cell.