{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T14:52:56Z","timestamp":1779202376873,"version":"3.51.4"},"reference-count":18,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2019,4,28]],"date-time":"2019-04-28T00:00:00Z","timestamp":1556409600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a miniaturized Ultra High Frequency Radio Frequency Identification (UHF-RFID) tag-based sensor antenna using a magneto- dielectric substrate (MDS) for wireless identification and sensor applications is presented. Two models of RFID tag-based sensors are designed, fabricated and measured. The first model uses two RFID tags; both of the tags are incorporated with two RFID chips. A passive sensor is also integrated in one of the proposed tags to serve as a sensor node, while the other tag is used as a reference node. Based on the difference in the minimum power required to activate the reference and sensor nodes, the sensed data (temperature or humidity) can be determined. The magneto-dielectric substrate layer is placed underneath the patch antenna to reduce the size of the proposed sensor by about 75% compared to a conventional RFID tag-based sensor. The magneto-dielectric layer is thin enough to embed in the planer circuit. To reduce the size of the proposed sensor, a multi-port tag for including the reference and sensor node in one antenna is also presented. The proposed RFID tag-based sensors have several features such as small size, they are completely capable for two objectives at the same time and easy to integrate with a planer circuit.<\/jats:p>","DOI":"10.3390\/s19091982","type":"journal-article","created":{"date-parts":[[2019,4,29]],"date-time":"2019-04-29T02:57:32Z","timestamp":1556506652000},"page":"1982","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Miniaturized Multi-Port Microstrip Patch Antenna Using Metamaterial for Passive UHF RFID-Tag Sensor Applications"],"prefix":"10.3390","volume":"19","author":[{"given":"Jamal","family":"Zaid","sequence":"first","affiliation":[{"name":"Institut national de la Recherche scientifique Centre, Centre \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications 800, De La Gaucheti\u00e8re Ouest Bureau 6900, Montr\u00e9al, QC H5A 1K6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdulhadi","family":"E. Abdulhadi","sequence":"additional","affiliation":[{"name":"Institut national de la Recherche scientifique Centre, Centre \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications 800, De La Gaucheti\u00e8re Ouest Bureau 6900, Montr\u00e9al, QC H5A 1K6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tayeb","family":"A. Denidni","sequence":"additional","affiliation":[{"name":"Institut national de la Recherche scientifique Centre, Centre \u00c9nergie Mat\u00e9riaux T\u00e9l\u00e9communications 800, De La Gaucheti\u00e8re Ouest Bureau 6900, Montr\u00e9al, QC H5A 1K6, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,4,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2691","DOI":"10.1109\/TAP.2008.927541","article-title":"Multiport sensor RFIDs for wireless passive sensing of objects\u2014Basic theory and early results","volume":"56","author":"Marrocco","year":"2008","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4056","DOI":"10.1109\/TAP.2012.2207045","article-title":"Passive UHF RFID tag for heat sensing applications","volume":"60","author":"Babar","year":"2012","journal-title":"IEEE Trans. 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