{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T16:37:20Z","timestamp":1778344640796,"version":"3.51.4"},"reference-count":95,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2019,8,1]],"date-time":"2019-08-01T00:00:00Z","timestamp":1564617600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003329","name":"Ministerio de Econom\u00eda y Competitividad","doi-asserted-by":"publisher","award":["project TEC2016-75650-R"],"award-info":[{"award-number":["project TEC2016-75650-R"]}],"id":[{"id":"10.13039\/501100003329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002809","name":"Generalitat de Catalunya","doi-asserted-by":"publisher","award":["project 2017SGR-1159"],"award-info":[{"award-number":["project 2017SGR-1159"]}],"id":[{"id":"10.13039\/501100002809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003741","name":"Instituci\u00f3 Catalana de Recerca i Estudis Avan\u00e7ats","doi-asserted-by":"publisher","award":["ICREA"],"award-info":[{"award-number":["ICREA"]}],"id":[{"id":"10.13039\/501100003741","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a review of the state-of-the-art chipless radiofrequency identification (RFID) technology is carried out. This recent technology may provide low cost tags as long as these tags are not equipped with application specific integrated circuits (ASICs). Nevertheless, chipless-RFID presents a series of technological challenges that have been addressed by different research groups in the last decade. One of these challenges is to increase the data storage capacity of tags, in order to be competitive with optical barcodes, or even with chip-based RFID tags. Thus, the main aim of this paper is to properly clarify the advantages and disadvantages of chipless-RFID technology. Moreover, since the coding information is an important aspect in such technology, the different coding techniques, as well as the main figures of merit used to compare different chipless-RFID tags, will be analyzed.<\/jats:p>","DOI":"10.3390\/s19153385","type":"journal-article","created":{"date-parts":[[2019,8,1]],"date-time":"2019-08-01T11:39:37Z","timestamp":1564659577000},"page":"3385","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":152,"title":["Chipless-RFID: A Review and Recent Developments"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1934-9993","authenticated-orcid":false,"given":"Cristian","family":"Herrojo","sequence":"first","affiliation":[{"name":"CIMITEC, Departament d\u2019Enginyeria Electr\u00f2nica, Universitat Aut\u00f2noma de Barcelona, 08193 Bellaterra, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7252-1169","authenticated-orcid":false,"given":"Ferran","family":"Paredes","sequence":"additional","affiliation":[{"name":"CIMITEC, Departament d\u2019Enginyeria Electr\u00f2nica, Universitat Aut\u00f2noma de Barcelona, 08193 Bellaterra, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6116-8681","authenticated-orcid":false,"given":"Javier","family":"Mata-Contreras","sequence":"additional","affiliation":[{"name":"Departamento de Ingenier\u00eda de Comunicaciones, Escuela T\u00e9cnica Superior de Ingenier\u00eda de Telecomunicaci\u00f3n, Universidad de M\u00e1laga, 29071 M\u00e1laga, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1494-9167","authenticated-orcid":false,"given":"Ferran","family":"Mart\u00edn","sequence":"additional","affiliation":[{"name":"CIMITEC, Departament d\u2019Enginyeria Electr\u00f2nica, Universitat Aut\u00f2noma de Barcelona, 08193 Bellaterra, Barcelona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,8,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Rance, O., Perret, E., Siragusa, R., and Lema\u00eetre-Auger, P. (2017). RCS Synthesis for Chipless RFID: Theory and Design, Elsevier.","DOI":"10.1016\/B978-1-78548-144-4.50003-8"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Perret, E. (2014). Radio Frequency Identification and Sensors: From RFID to Chipless RFID, John Wiley & Sons, Inc.","DOI":"10.1002\/9781119054016"},{"key":"ref_3","unstructured":"Vena, A., Perret, E., and Tedjini, S. (2016). Chipless RFID Based on RF Encoding Particle: Realization, Coding and Reading System, ISTE Press\u2014Elsevier."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Karmakar, N.C., Amin, E.M., and Saha, J.K. (2016). Chipless RFID Sensors, John Wiley & Sons, Inc.","DOI":"10.1002\/9781119078104"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Karmakar, N.C. (2010). Handbook of Smart Antennas for RFID Systems, John Wiley & Sons, Inc.","DOI":"10.1002\/9780470872178"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Rezaiesarlak, R., and Manteghi, M. (2015). Chipless RFID: Design Procedure and Detection Techniques, Springer.","DOI":"10.1007\/978-3-319-10169-9"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Finkenzeller, K. (2010). RFID Handbook: Fundamentals and Applications in Contactless Smart Cards, Radio Frequency Identification and Near-Field Communication, Wiley-Blackwell.","DOI":"10.1002\/9780470665121"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Karmakar, N.C., Kalansuriya, P., Azim, R.E., and Koswatta, R. (2016). Chipless Radio Frequency Identification Reader Signal Processing, John Wiley & Sons, Inc.","DOI":"10.1002\/9781119215783"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Hunt, V.D., Puglia, A., and Puglia, M. (2007). RFID: A Guide to Radio Frequency Identification, Wiley-Interscience.","DOI":"10.1002\/0470112255"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Karmakar, N.C., Zomorrodi, M., and Divarathne, C. (2016). Advanced Chipless RFID, John Wiley & Sons, Inc.","DOI":"10.1002\/9781119227342"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Preradovic, S., and Karmakar, N. (2012). Multiresonator-Based Chipless RFID: Barcode of the Future, Springer.","DOI":"10.1007\/978-1-4614-2095-8"},{"key":"ref_12","unstructured":"Karmakar, N.C., Amin, E.M., and Saha, J.K. (2013). Chipless RFID Reader Architecture, John Wiley & Sons, Inc."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Schussler, M., Mandel, C., Maasch, M., Giere, A., and Jakoby, R. (2009, January 7\u201310). Phase modulation scheme for chipless RFID- and wireless sensor tags. Proceedings of the 2009 Asia Pacific Microwave Conference, Singapore.","DOI":"10.1109\/APMC.2009.5385319"},{"key":"ref_14","unstructured":"Nysen, P.A., Skeie, H., and Armstrong, D. (1988). System for Interrogating a Passive Transponder Carrying Phase-Encoded Information. (No. 4,725,841), U.S. Patent."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1109\/ULTSYM.2002.1193354","article-title":"A global SAW ID tag with large data capacity","volume":"Volume 1","author":"Hartmann","year":"2002","journal-title":"Proceedings of the Proceedings 2002 IEEE Ultrasonics Symposium"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Saldanha, N., and Malocha, D.C. (2007, January 28\u201331). Design parameters for SAW multi-tone frequency coded reflectors. Proceedings of the IEEE Ultrasonics Symposium, New York, NY, USA.","DOI":"10.1109\/ULTSYM.2007.525"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"208","DOI":"10.1109\/TUFFC.2008.629","article-title":"Z-path SAW RFID tag","volume":"55","author":"Plessky","year":"2008","journal-title":"IEEE Trans. Ultrason. Ferroelectr. Freq. Control"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1387","DOI":"10.1109\/TUFFC.2008.802","article-title":"Reflection and scattering characteristics of reflectors in SAW tags","volume":"55","author":"Han","year":"2008","journal-title":"IEEE Trans. Ultrason. Ferroelectr. Freq. Control"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"812","DOI":"10.1109\/TUFFC.2009.1104","article-title":"Feasibility of ultra-wideband SAW RFID tags meeting FCC rules","volume":"56","author":"Plessky","year":"2009","journal-title":"IEEE Trans. Ultrason. Ferroelectr. Freq. Control"},{"key":"ref_20","unstructured":"Hartmann, C., Hartmann, P., Brown, P., Bellamy, J., Claiborne, L., and Bonner, W. (2004, January 23\u201327). Anti-collision methods for Global SAW RFID Tag systems. Proceedings of the IEEE Ultrasonics Symposium, Montreal, QC, Canada."},{"key":"ref_21","unstructured":"Zhang, L., Rodriguez, S., Tenhunen, H., and Zheng, L.-R. (2006, January 27\u201328). An innovative fully printable RFID technology based on high speed time-domain reflections. Proceedings of the Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, 2006 (HDP\u201906), Shanghai, China."},{"key":"ref_22","unstructured":"Zheng, L., Rodriguez, S., Zhang, L., Shao, B., and Zheng, L.-R. (2008, January 18\u201321). Design and implementation of a fully reconfigurable chipless RFID tag using Inkjet printing technology. Proceedings of the 2008 IEEE International Symposium on Circuits and Systems, Seattle, WA, USA."},{"key":"ref_23","unstructured":"Shao, B., Chen, Q., Amin, Y., Mendoza, D.S., Liu, R., and Zheng, L.R. (2010, January 8\u201310). An ultra-low-cost RFID tag with 1.67 Gbps data rate by ink-jet printing on paper substrate. Proceedings of the 2010 IEEE Asian Solid-State Circuits Conference, A-SSCC 2010, Beijing, China."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"588","DOI":"10.1109\/LMWC.2006.884897","article-title":"Transmission delay line based ID generation circuit for RFID applications","volume":"16","author":"Chamarti","year":"2006","journal-title":"IEEE Microw. Compon. Lett."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1900","DOI":"10.1002\/mop.22599","article-title":"Transmission line delay-based radio frequency identification (RFID) tag","volume":"49","author":"Vemagiri","year":"2007","journal-title":"Microw. Opt. Technol. Lett."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"5075","DOI":"10.1109\/TAP.2012.2207681","article-title":"Printed magnetoinductive-wave (MIW) delay lines for chipless RFID applications","volume":"60","author":"Paredes","year":"2012","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_27","unstructured":"Javier, F., Mart\u00ednez, H., Paredes, F., Zamora, G., and Mart\u00edn, F. (2012, January 8\u201314). Chipless RFID Tags and Wireless Sensors Based on Planar Magnetoinductive-Wave (MIW) Delay Lines. Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, Chicago, IL, USA."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"5064","DOI":"10.1109\/TAP.2018.2858144","article-title":"A contactless RFID system based on chipless MIW tags","volume":"66","year":"2018","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"371","DOI":"10.1049\/el:20020258","article-title":"Magneto-inductive waveguide","volume":"38","author":"Shamonina","year":"2002","journal-title":"Electron. Lett."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Shadrivov, I.V., Lapine, M., and Kivshar, Y.S. (2015). Parametric Amplification of Magneto-Inductive Waves. Nonlinear, Tunable and Active Metamaterials, Springer International Publishing.","DOI":"10.1007\/978-3-319-08386-5"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Gupta, S., Nikfal, B., and Caloz, C. (2010, January 7\u201310). RFID system based on pulse-position modulation using group delay engineered microwave C-sections. Proceedings of the 2010 Asia-Pacific Microwave Conference, Yokohama, Japan.","DOI":"10.1109\/LAWP.2011.2178058"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Nair, R., Perret, E., and Tedjini, S. (2011, January 15\u201316). Chipless RFID based on group delay encoding. Proceedings of the 2011 IEEE International Conference on RFID-Technologies and Applications, Sitges, Spain.","DOI":"10.1109\/RFID-TA.2011.6068640"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1109\/TMTT.1966.1126251","article-title":"Analysis and exact synthesis of cascaded commensurate transmission-line C-Section all-pass networks","volume":"14","author":"Cristal","year":"1966","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1017\/wpt.2015.10","article-title":"Chipless RFID tags and sensors: A review on time-domain techniques","volume":"2","author":"Forouzandeh","year":"2015","journal-title":"Wirel. Power Transf."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1366","DOI":"10.1109\/LAWP.2011.2178058","article-title":"Chipless RFID system based on group delay engineered dispersive delay structures","volume":"10","author":"Gupta","year":"2011","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Nair, R., Perret, E., and Tedjini, S. (2012, January 17\u201322). Temporal multi-frequency encoding technique for chipless RFID applications. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Montreal, QC, Canada.","DOI":"10.1109\/MWSYM.2012.6259483"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"447","DOI":"10.1007\/s12243-013-0370-y","article-title":"Group delay modulation for pulse position coding based on periodically coupled C-sections","volume":"68","author":"Nair","year":"2013","journal-title":"Ann. Telecommun."},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Mandel, C., Schussler, M., Maasch, M., and Jakoby, R. (2009, January 24\u201325). A novel passive phase modulator based on LH delay lines for chipless microwave RFID applications. Proceedings of the 2009 IEEE MTT-S International Microwave Workshop on Wireless Sensing, Local Positioning, and RFID, Cavtat, Croatia.","DOI":"10.1109\/IMWS2.2009.5307891"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"7850","DOI":"10.1109\/JSEN.2018.2862947","article-title":"Hybrid Time-Frequency Modulation Scheme for Chipless Wireless Identification and Sensing","volume":"18","author":"Schussler","year":"2018","journal-title":"IEEE Sens. J."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Sch\u00fc\u00dfler, M., Damm, C., Maasch, M., and Jakoby, R. (2008, January 15\u201320). Performance evaluation of left-handed delay lines for RFID backscatter applications. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Atlanta, GA, USA.","DOI":"10.1109\/MWSYM.2008.4633132"},{"key":"ref_41","doi-asserted-by":"crossref","unstructured":"Herrojo, C., Mata-Contreras, J., Paredes, F., and Martin, F. (2017, January 4\u20139). Near-field chipless RFID encoders with sequential bit reading and high data capacity. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Honololu, HI, USA.","DOI":"10.1109\/MWSYM.2017.8058928"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"4805","DOI":"10.1109\/JSEN.2017.2715982","article-title":"Microwave Encoders for Chipless RFID and Angular Velocity Sensors Based on S-Shaped Split Ring Resonators","volume":"17","author":"Herrojo","year":"2017","journal-title":"IEEE Sens. J."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"5298","DOI":"10.1109\/TMTT.2017.2768029","article-title":"Near-Field Chipless-RFID System with High Data Capacity for Security and Authentication Applications","volume":"65","author":"Herrojo","year":"2017","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"322","DOI":"10.1016\/j.jmmm.2017.10.005","article-title":"Near-field chipless-RFID tags with sequential bit reading implemented in plastic substrates","volume":"459","author":"Herrojo","year":"2017","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"(2017). Herrojo, Cristian; Mata-Contreras, Javier; Paredes, Ferran; Mart\u00edn, Ferran High data density and capacity in chipless radiofrequency identification (chipless-RFID) tags based on double-chains of S-shaped split ring resonators (S-SRRs). EPJ Appl. Metamat., 4, 8.","DOI":"10.1051\/epjam\/2017008"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"272","DOI":"10.1109\/LMWC.2018.2802718","article-title":"Near-Field Chipless-RFID System With Erasable\/Programmable 40-bit Tags Inkjet Printed on Paper Substrates","volume":"28","author":"Herrojo","year":"2018","journal-title":"IEEE Microw. Wirel. Components Lett."},{"key":"ref_47","unstructured":"Herrojo, C., Moras, M., Paredes, F., N\u00fa\u00f1ez, A., Mata-Contreras, J., Ramon, E., and Mart\u00edn, F. Time-Domain Signature Chipless- RFID tags. IEEE Microw. Mag., Underprocessing."},{"key":"ref_48","doi-asserted-by":"crossref","unstructured":"Herrojo, C., Moras, M., Paredes, F., N\u00fa\u00f1ez, A., Ramon, E., Mata-Contreras, J., and Mart\u00edn, F. (2018). Very Low-Cost 80-Bit Chipless-RFID Tags Inkjet Printed on Ordinary Paper. Technologies, 6.","DOI":"10.3390\/technologies6020052"},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Paredes, F., Herrojo, C., Mata-Contreras, J., Moras, M., N\u00fa\u00f1ez, A., Ramon, E., and Mart\u00edn, F. (2018). Near-field chipless radio-frequency identification (RFID) sensing and identification system with switching reading. Sensors, 18.","DOI":"10.3390\/s18041148"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"3673","DOI":"10.1109\/JSEN.2019.2895015","article-title":"High-Density Microwave Encoders for Motion Control and Near-Field Chipless-RFID","volume":"19","author":"Herrojo","year":"2019","journal-title":"IEEE Sens. J."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1109\/LAWP.2018.2881356","article-title":"Enhancing the Per-Unit-Length Data Density in Near-Field Chipless-RFID Systems with Sequential Bit Reading","volume":"18","author":"Havlicek","year":"2019","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_52","unstructured":"Herrojo, C., Paredes, F., and Mart\u00edn, F. Double-Stub Loaded Microstrip Line Reader for Very High Data Density Microwave Encoders, Accepted."},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Herrojo, C., V\u00e9lez, P., Paredes, F., Mata-contreras, J., and Mart\u00edn, F. (2019, January 2\u20137). All-dielectric Electromagnetic Encoders based on Permittivity Contrast for Displacement\/Velocity Sensors and Chipless-RFID Tags. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Boston, MA, USA.","DOI":"10.1109\/MWSYM.2019.8701060"},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"Preradovic, S., Balbin, I., Karmakar, N.C., and Swiegers, G. (2008, January 16\u201317). A novel chipless RFID system based on planar multiresonators for barcode replacement. Proceedings of the 2008 IEEE International Conference on RFID, Las Vegas, NV, USA.","DOI":"10.1109\/RFID.2008.4519383"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1109\/MMM.2010.938571","article-title":"Chipless RFID: Bar code of the future","volume":"11","author":"Preradovic","year":"2010","journal-title":"IEEE Microw. Mag."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"1411","DOI":"10.1109\/TMTT.2009.2017323","article-title":"Multiresonator-based chipless RFID system for low-cost item tracking","volume":"57","author":"Preradovic","year":"2009","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"207","DOI":"10.1109\/LAWP.2010.2045872","article-title":"Design of chipless RFID tag for operation on flexible laminates","volume":"9","author":"Preradovic","year":"2010","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_58","doi-asserted-by":"crossref","unstructured":"Bhuiyan, S., Azad, A.K.M., and Karmakar, N. (2013, January 2\u20135). Dual-band modified complementary split ring resonator (MCSRR) based multi-resonator circuit for chipless RFID Tag. Proceedings of the IEEE 8th International Conference on Intelligent Sensors, Sensor Networks, Melbourne, Australia.","DOI":"10.1109\/ISSNIP.2013.6529802"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1109\/LAWP.2012.2185032","article-title":"Frequency-coded chipless RFID tag based on dual-band resonators","volume":"11","author":"Girbau","year":"2012","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"1053","DOI":"10.1007\/s00339-012-7384-6","article-title":"Selective mode suppression in coplanar waveguides using metamaterial resonators","volume":"109","author":"Naqui","year":"2012","journal-title":"Appl. Phys. A Mater. Sci. Process."},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Naqui, J., Dur\u00e1n-Sindreu, M., and Martin, F. (2013, January 14\u201316). Strategies for the implementation of sensors and RF barcodes based on transmission lines loaded with symmetric resonators. Proceedings of the 2013 Conference Proceedings: 21st International Conference on Applied Electromagnetics and Communications, Dubrovnik, Croatia.","DOI":"10.1109\/ICECom.2013.6684751"},{"key":"ref_62","unstructured":"Preradovic, S. (2010). Chipless RFID System for Barcode Replacement, Monash University."},{"key":"ref_63","doi-asserted-by":"crossref","unstructured":"Preradovic, S., and Karmakar, N. (2010). Chipless RFID tag with integrated sensor. Proc. IEEE Sensors, 1277\u20131281.","DOI":"10.1109\/ICSENS.2010.5690591"},{"key":"ref_64","unstructured":"Preradovic, S., and Karmakar, N. (2010, January 27\u201328). 4th generation multiresonator-based chipless RFID tag utilizing spiral EBGs. Proceedings of the 2010 European Microwave Conference, Paris, France."},{"key":"ref_65","doi-asserted-by":"crossref","unstructured":"Jalaly, I., and Robertson, I.D. (2005, January 13\u201317). RF barcodes using multiple frequency bands. Proceedings of the IEEE MTT-S International Microwave Symposium Digest, Long Beach, CA, USA.","DOI":"10.1109\/MWSYM.2005.1516542"},{"key":"ref_66","doi-asserted-by":"crossref","unstructured":"Jalaly, I., and Robertson, I.D. (2005, January 4\u20136). Capacitively-tuned split microstrip resonators for RFID barcodes. Proceedings of the 2005 European Microwave Conference, Paris, France.","DOI":"10.1109\/EUMC.2005.1610138"},{"key":"ref_67","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1109\/LMWC.2009.2024840","article-title":"Phase-encoded chipless RFID transponder for large scale low cost applications","volume":"19","author":"Balbin","year":"2009","journal-title":"IEEE Microw. Compon. Lett."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"4429","DOI":"10.1109\/TAP.2012.2207081","article-title":"Chipless RFID tag using multiple microstrip open stub resonators","volume":"60","author":"Nijas","year":"2012","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1109\/LMWC.2012.2188785","article-title":"A fully printable Chipless RFID tag with detuning correction technique","volume":"22","author":"Vena","year":"2012","journal-title":"IEEE Microw. Compon. Lett."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"640","DOI":"10.1109\/LMWC.2010.2073692","article-title":"Design of low-cost chipless system using printable chipless tag with electromagnetic code","volume":"20","author":"Jang","year":"2010","journal-title":"IEEE Microw. Compon. Lett."},{"key":"ref_71","unstructured":"McVay, J., Hoorfar, A., and Engheta, N. (2006, January 17\u201319). Space-filling curve RFID tags. Proceedings of the 2006 IEEE Radio and Wireless Symposium, San Diego, CA, USA."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"898","DOI":"10.1109\/TAP.2013.2290998","article-title":"Complex-natural-resonance-based design of chipless RFID tag for high-density data","volume":"62","author":"Rezaiesarlak","year":"2014","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_73","doi-asserted-by":"crossref","unstructured":"Nijas, C.M., Suseela, S., Deepak, U., Wahid, P., and Mohanan, P. (2013, January 14\u201316). Low cost chipless tag with multi-bit encoding technique. Proceedings of the IEEE MTT-S International Microwave and RF Conference, New Delhi, India.","DOI":"10.1109\/IMaRC.2013.6777727"},{"key":"ref_74","doi-asserted-by":"crossref","unstructured":"Machac, J., and Polivka, M. (2014, January 15\u201316). Influence of mutual coupling on performance of small scatterers for chipless RFID tags. Proceedings of the 2014 24th International Conference Radioelektronika, Bratislava, Slovakia.","DOI":"10.1109\/Radioelek.2014.6828412"},{"key":"ref_75","doi-asserted-by":"crossref","unstructured":"Machac, J., Polivka, M., Svanda, M., and Havlicek, J. (2018, January 14\u201317). Frequency-domain chipless RFID transponders: Improvement the reading response. Proceedings of the MIKON 2018\u201422nd International Microwave and Radar Conference, Poznan, Poland.","DOI":"10.23919\/MIKON.2018.8405332"},{"key":"ref_76","doi-asserted-by":"crossref","unstructured":"Svanda, M., Machac, J., Polivka, M., and Havlicek, J. (2016, January 9\u201311). A comparison of two ways to reducing the mutual coupling of chipless RFID tag scatterers. Proceedings of the 2016 21st International Conference on Microwave, Radar and Wireless Communications, MIKON 2016, Krakow, Poland.","DOI":"10.1109\/MIKON.2016.7491983"},{"key":"ref_77","doi-asserted-by":"crossref","first-page":"2167","DOI":"10.1049\/iet-map.2018.5434","article-title":"Polarisation independent chipless RFID tag based on circular arrangement of dual-spiral capacitively-loaded dipoles with robust RCS response","volume":"12","author":"Svanda","year":"2018","journal-title":"IET Microw. Antennas Propag."},{"key":"ref_78","doi-asserted-by":"crossref","unstructured":"Polivka, M., Svanda, M., Havlicek, J., and Machac, J. (2018, January 9\u201313). Semi-Platform Tolerant 20-bit Chipless RFID Tag Composed of Dipole Array Closely Coupled to Plate. Proceedings of the 12th European Conference on Antennas and Propagation (EuCAP 2018), London, UK.","DOI":"10.1049\/cp.2018.0482"},{"key":"ref_79","doi-asserted-by":"crossref","first-page":"618","DOI":"10.1109\/TAP.2017.2782262","article-title":"Design of Chipless RFID Tag by Using Miniaturized Open-Loop Resonators","volume":"66","author":"Wang","year":"2018","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_80","doi-asserted-by":"crossref","first-page":"4509","DOI":"10.1109\/TAP.2012.2207347","article-title":"High-capacity chipless RFID tag insensitive to the polarization","volume":"60","author":"Vena","year":"2012","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_81","doi-asserted-by":"crossref","first-page":"2913","DOI":"10.1109\/TMTT.2012.2203927","article-title":"Design of compact and auto-compensated single-layer chipless RFID tag","volume":"60","author":"Vena","year":"2012","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_82","doi-asserted-by":"crossref","unstructured":"Khaliel, M., El-Awamry, A., Fawky, A., El-Hadidy, M., and Kaiser, T. (2015, January 19\u201324). A novel co\/cross-polarizing chipless RFID tags for high coding capacity and robust detection. Proceedings of the 2015 IEEE International Symposium on Antennas and Propagation & USNC\/URSI National Radio Science Meeting, Vancouver, BC, Canada.","DOI":"10.1109\/APS.2015.7304465"},{"key":"ref_83","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1109\/LAWP.2018.2889322","article-title":"Automatic Topology Generation of 21 Bit Chipless Radio Frequency Identification Tags Using a Noniterative Technique","volume":"18","author":"Chen","year":"2019","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_84","doi-asserted-by":"crossref","unstructured":"Chen, Y.-S., Jiang, T.-Y., and Lai, F.-P. (2019). Design rule development for frequency-coded chipless radiofrequency identification with high capacity. IET Microw. Antennas Propag., 1255\u20131261.","DOI":"10.1049\/iet-map.2019.0026"},{"key":"ref_85","doi-asserted-by":"crossref","first-page":"1325","DOI":"10.1049\/iet-map.2016.0759","article-title":"Hybrid coding chipless tag based on impedance loading","volume":"11","author":"Ni","year":"2017","journal-title":"IET Microw. Antennas Propag."},{"key":"ref_86","doi-asserted-by":"crossref","unstructured":"Herrojo, C., Paredes, F., Mata-Contreras, J., Zuffanelli, S., and Martin, F. (2017). Multistate Multiresonator Spectral Signature Barcodes Implemented by Means of S-Shaped Split Ring Resonators (S-SRRs). IEEE Trans. Microw. Theory Tech., 65.","DOI":"10.1109\/TMTT.2017.2672547"},{"key":"ref_87","doi-asserted-by":"crossref","unstructured":"Rance, O., Siragusa, R., Lemaitre-Auger, P., and Perret, E. (2015, January 17\u201322). RCS magnitude coding for chipless RFID based on depolarizing tag. Proceedings of the 2015 IEEE MTT-S International Microwave Symposium, Phoenix, AZ, USA.","DOI":"10.1109\/MWSYM.2015.7166929"},{"key":"ref_88","doi-asserted-by":"crossref","first-page":"753","DOI":"10.1109\/LAWP.2013.2270932","article-title":"A novel near-transparent ask-reconfigurable inkjet-printed chipless RFID tag","volume":"12","author":"Vena","year":"2013","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_89","doi-asserted-by":"crossref","first-page":"2315","DOI":"10.1109\/TMTT.2016.2562625","article-title":"Toward RCS magnitude level coding for chipless RFID","volume":"64","author":"Rance","year":"2016","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_90","doi-asserted-by":"crossref","first-page":"3356","DOI":"10.1109\/TMTT.2011.2171001","article-title":"Chipless RFID tag using hybrid coding technique","volume":"59","author":"Vena","year":"2011","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_91","doi-asserted-by":"crossref","unstructured":"El-Awamry, A., Khaliel, M., Fawky, A., El-Hadidy, M., and Kaiser, T. (2015, January 15\u201317). Novel notch modulation algorithm for enhancing the chipless RFID tags coding capacity. Proceedings of the 2015 IEEE International Conference on RFID, San Diego, CA, USA.","DOI":"10.1109\/RFID.2015.7113069"},{"key":"ref_92","doi-asserted-by":"crossref","first-page":"3785","DOI":"10.1109\/TMTT.2015.2482968","article-title":"Compact printable chipless RFID systems","volume":"63","author":"Islam","year":"2015","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_93","doi-asserted-by":"crossref","first-page":"2142","DOI":"10.1109\/TMTT.2012.2195021","article-title":"A novel compact printable dual-polarized chipless RFID system","volume":"60","author":"Islam","year":"2012","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_94","doi-asserted-by":"crossref","unstructured":"Vena, A., Perret, E., and Tedjini, S. (2012, January 3\u20135). A compact chipless RFID tag using polarization diversity for encoding and sensing. Proceedings of the 2012 IEEE International Conference on RFID, RFID 2012, Orlando, FL, USA.","DOI":"10.1109\/RFID.2012.6193050"},{"key":"ref_95","doi-asserted-by":"crossref","first-page":"67415","DOI":"10.1109\/ACCESS.2018.2879050","article-title":"Hybrid chipless RFID Tags- A pathway to EPC global standard","volume":"6","author":"Babaeian","year":"2018","journal-title":"IEEE Access"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/15\/3385\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:12:25Z","timestamp":1760188345000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/15\/3385"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,8,1]]},"references-count":95,"journal-issue":{"issue":"15","published-online":{"date-parts":[[2019,8]]}},"alternative-id":["s19153385"],"URL":"https:\/\/doi.org\/10.3390\/s19153385","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,8,1]]}}}