The Effect of Conductive Ink Layer Thickness on the Functioning of Printed UHF RFID Antennas

In this study, the effect of the conductive ink layer thickness on the performance of printed ultra-high-frequency (UHF) radio-frequency identification (RFID) tag antennas was investigated. A simple quarter wave dipole tag for European UHF RFID frequencies was designed to be tested in this study. All the tags were made by using screen-printing technique. Three different thicknesses for the ink layer were used. Performance of the tags was analyzed by the measurement of threshold and backscatter power. The results show that it is possible to produce RFID tag antennas by screen printing and it is possible to optimize the tag performance by adjusting the thickness of the electrically conductive layer. The results show how the performance characteristics deteriorated when the thickness of the printed ink layer was reduced. However, it was also shown that thin ink layers can be used in some applications and cost savings can be achieved in this way. It is therefore important to recognize these effects on the performance.

[1]  Matti Mäntysalo,et al.  An inkjet-deposited antenna for 2.4 GHz applications , 2009 .

[2]  Lauri Sydanheimo,et al.  Performance comparison of silver ink and copper conductors for microwave applications , 2010 .

[3]  Lauri Sydanheimo,et al.  The Effect of Fabrication Method on Passive UHF RFID Tag Performance , 2009 .

[4]  Darren J. Southee,et al.  Examination of silver–graphite lithographically printed resistive strain sensors , 2007 .

[5]  W. Marsden.  I and J , 2012 .

[6]  N. Halonen,et al.  Gravure printing of conductive particulate polymer inks on flexible substrates , 2005 .

[7]  Hans-Erik Nilsson,et al.  Printed antennas with variable conductive ink layer thickness , 2007 .

[8]  Hans-Erik Nilsson,et al.  Evaluation of a printed patch antenna for robust microwave RFID tags , 2007 .

[9]  Lauri Sydanheimo,et al.  Analysis of Silver Ink Bow-Tie RFID Tag Antennas Printed on Paper Substrates , 2007 .

[10]  D. Cheng.  Field and wave electromagnetics , 1983 .

[11]  Pekka Ruuskanen,et al.  The characterization of electrically conductive silver ink patterns on flexible substrates , 2009, Microelectron. Reliab..

[12]  K. Kurokawa,et al.  Power Waves and the Scattering Matrix , 1965 .

[13]  Anne Blayo,et al.  Printing processes and their potential for RFID printing , 2005, sOc-EUSAI '05.

[14]  A. Koptioug,et al.  Reduced Amount of Conductive Ink with Gridded Printed Antennas , 2005, Polytronic 2005 - 5th International Conference on Polymers and Adhesives in Microelectronics and Photonics.

[15]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[16]  Pavel Nikitin,et al.  Differential RCS of RFID tag , 2007 .

[17]  S.Y.Y. Leung,et al.  Geometric and Compaction Dependence of Printed Polymer-Based RFID Tag Antenna Performance , 2008, IEEE Transactions on Electronics Packaging Manufacturing.

[18]  C. Balanis.  Advanced Engineering Electromagnetics , 1989 .

[19]  K.V.S. Rao,et al.  Low cost silver ink RFID tag antennas , 2005, 2005 IEEE Antennas and Propagation Society International Symposium.