Data Encoding Improvement and Size Reduction of Chipless RFID Tag Using Short-Circuit Line Effect and Angle-Based Divided Loops
Main Article Content
Abstract
This paper focuses on a short circuit and concentric loop effects to improve the structure dimension as well as enhance the ability to encode electromagnetic wave data for chipless RFID tags. The tag is composed of star-shaped rings that are concentrically nested together. The following factors help reduce the tag size: using the phenomenon of electromagnetic backscattering, assessment by the Radar Cross Section (RCS), the antenna-free tag only includes the multi-frequency resonators. By inserting short circuit lines combined with concentric loops, the number of resonant peaks increases exponentially without increasing the tag overall dimension. In addition, by inserting the short circuit lines at different angles between the two consecutive loops, we can adjust the resonant frequency in the frequency bands, thereby changing the value of the bit by shifting the frequency position. The overall dimension of the resulted tag is 13mm×13 mm and the tag is aimed to be a printable tag on the flexible substrate to minimize the fabrication cost. With the 18-vertex star-shaped tag with five concentric loops, this chipless RFID tag can encode up to 16 bits with high resolution and large data density.
Keywords
Chipless RFID, angle division, short-circuit, frequency encoding, radar cross section
Article Details
References
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[20] Riaz, M.A., Abdullah, Y., Shahid, H., Amin, Y., Akram, A. and Tenhunen, H., 2018. Novel butterfly slot based chipless RFID tag. Radioengineering, 27(3), p.777.
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[3] C. Feng, C., Zhang, W., Li, L., Han, L., Chen, X. and Ma, R., 2015. Angle-based chipless RFID tag with high capacity and insensitivity to polarization. IEEE Transactions on Antennas and Propagation, vol. 63, no. 4, pp.1789-1797.
[4] Harma, S., Plessky, V.P., Li, X. and Hartogh, P., 2009. Feasibility of ultra-wideband SAW RFID tags meeting FCC rules. IEEE Transactions on ultrasonics, ferroelectrics, and frequency control, 56(4), pp.812-820.
[5] Han, T., Wang, W., Wu, H. and Shui, Y., 2008. Reflection and scattering characteristics of reflectors in SAW tags. IEEE Transactions on ultrasonics, ferroelectrics, and frequency control, 55(6), pp.1387-1390.
[6] Saldanha, N. and Malocha, D.C., 2007, October. P4J-1 design parameters for SAW multi-tone frequency coded reflectors. In 2007 IEEE Ultrasonics Symposium Proceedings (pp. 2087-2090).
[7] Liu, J. and Yao, J., 2008. Wireless RF identification system based on SAW. IEEE Transactions on industrial electronics, 55(2), pp.958-961.
[8] Vemagiri, J., Chamarti, A., Agarwal, M. and Varahramyan, K., 2007. Transmission line delay-based radio frequency identification (RFID) tag. Microwave and optical technology letters, 49(8), pp.1900-1904.
[9] Glickstein, M., Feb. 2004. Firewall protection for paper documents. RFID Journal internet article.
[10] Jones, K.C., 2007. Invisible tattoo ink for chipless RFID safe, company says. EE Times white paper.
[11] Amin, E.M. and Karmakar, N., 2011, October. Development of a chipless RFID temperature sensor using cascaded spiral resonators. In IEEE Sensors, 2011 (pp. 554-557).
[12] Vena, A., Perret, E. and Tedjini, S., 2011. Chipless RFID tag using hybrid coding technique. IEEE Transactions on Microwave Theory and Techniques, 59(12), pp.3356-3364.
[13] Huang, H.F. and Su, L., 2016. A compact dual-polarized chipless RFID tag by using nested concentric square loops. IEEE Antennas and Wireless Propagation Letters, 16, pp.1036-1039.
[14] Tedjini, S., Boularess, O., Andriamihiarvolamena, T., Rmili, H. and Aguili, T., 2017, June. A novel design of chipless RFID tags based on alphabets. In 2017 IEEE MTT-S International Microwave Symposium (IMS) (pp. 1561-1563).
[15] Mahafza, B.R., 2002. Radar systems analysis and design using MATLAB. CRC press.
[16] https://electronicsdesk.com/radar-system.html
[17] Uluisik, C., Cakir, G., Cakir, M. and Sevgi, L., 2008. Radar cross section (RCS) modeling and simulation, part 1: a tutorial review of definitions, strategies, and canonical examples. IEEE Antennas and Propagation Magazine, 50(1), pp.115-126.
[18] Li, H.J. and Kiang, Y.W., 2005. Radar and inverse scattering. In The Electrical Engineering Handbook (pp. 680-682). Elsevier.
[19] Islam, M.A. and Karmakar, N.C., 2012. A novel compact printable dual-polarized chipless RFID system. IEEE Transactions on Microwave Theory and Techniques, 60(7), pp.2142-2151.
[20] Riaz, M.A., Abdullah, Y., Shahid, H., Amin, Y., Akram, A. and Tenhunen, H., 2018. Novel butterfly slot based chipless RFID tag. Radioengineering, 27(3), p.777.