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International Journal of Antennas and Propagation
Volume 2009, Article ID 920947, 8 pages
http://dx.doi.org/10.1155/2009/920947
Research Article

The Effect of Fabrication Method on Passive UHF RFID Tag Performance

1Rauma Research Unit, Institute of Electronics, Tampere University of Technology, Kalliokatu 2, 26100 Rauma, Finland
2Department of Electronics, Tampere University of Technology-Pori, Pohjoisranta 11 A, 28100 Pori, Finland

Received 22 October 2008; Revised 11 February 2009; Accepted 7 May 2009

Academic Editor: You Chung Chung

Copyright © 2009 Toni Björninen 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

In passive Radio Frequency Identification (RFID), transponders or tags are used to label objects to be identified. In this study passive tag antennas were produced using etching, screen-printing, and gravure printing methods. The threshold and backscattered signal strengths of the tags were measured to determine the effect of different manufacturing methods on the tags' performance. Conductivity, skin depth, thickness, and the quality of the conducting layer have a major effect on tag performance. Each manufacturing method sets its own boundary conditions on the processibility of the high quality conduction layer and such conditions need to be considered in tag design. Tag design also affects the manufacturing parameters used in the different techniques. The results of the study show that each of the studied fabrication methods can be used to manufacture reliable RFID tags.