{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T18:59:20Z","timestamp":1777489160387,"version":"3.51.4"},"reference-count":32,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,1,9]],"date-time":"2023-01-09T00:00:00Z","timestamp":1673222400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministerio de Ciencia, Innovaci\u00f3n y Universidades, Gobierno de Espa\u00f1a (Agencia Estatal de Investigaci\u00f3n, Fondo Europeo de Desarrollo Regional -FEDER-, European Union)","award":["PID2021-127409OB-C31"],"award-info":[{"award-number":["PID2021-127409OB-C31"]}]},{"name":"Ministerio de Ciencia, Innovaci\u00f3n y Universidades, Gobierno de Espa\u00f1a (Agencia Estatal de Investigaci\u00f3n, Fondo Europeo de Desarrollo Regional -FEDER-, European Union)","award":["PNURSP2023R238"],"award-info":[{"award-number":["PNURSP2023R238"]}]},{"name":"Abdulrahman University","award":["PID2021-127409OB-C31"],"award-info":[{"award-number":["PID2021-127409OB-C31"]}]},{"name":"Abdulrahman University","award":["PNURSP2023R238"],"award-info":[{"award-number":["PNURSP2023R238"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this manuscript, a compact in size yet geometrically simple Ultra-Wideband (UWB) antenna is demonstrated. The flexible-by-nature substrate ROGERS 5880, having a thickness of 0.254 mm, is utilized to design the proposed work. The antenna configuration is an excerpt of a traditional rectangular monopole antenna resonating at 5 GHz. Initially, a pair of triangular slots are employed to extend the impedance bandwidth of the antenna. In addition, a semi-circular-shaped, short-ended stub is connected at the upper edges of the patch to further increase the operational bandwidth. After optimization, the proposed antenna offers UWB ranging from 2.73\u20139.68 GHz, covering almost the entire spectrum allocated globally for UWB applications. Further, the antenna offers a compact size of 15 \u00d7 20 mm2 that can easily be integrated into small, flexible electronics. The flexibility analysis is done by bending the antenna on both the x and y axes. The antenna offers performance stability in terms of return loss, radiation pattern, and gain for both conformal and non-conformal conditions. Furthermore, the strong comparison between simulated and measured results for both rigid and bent cases of the antenna, along with the performance comparison with the state-of-the-art, makes it a potential candidate for present and future compact-sized flexible devices.<\/jats:p>","DOI":"10.3390\/s23020748","type":"journal-article","created":{"date-parts":[[2023,1,9]],"date-time":"2023-01-09T07:05:09Z","timestamp":1673247909000},"page":"748","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["A Shorted Stub Loaded UWB Flexible Antenna for Small IoT Devices"],"prefix":"10.3390","volume":"23","author":[{"given":"Esraa","family":"Ali","sequence":"first","affiliation":[{"name":"Faculty of Aviation Sciences, Amman Arab University, Amman 11953, Jordan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4397-4211","authenticated-orcid":false,"given":"Wahaj","family":"Awan","sequence":"additional","affiliation":[{"name":"Department of Information and Communication Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3589-8669","authenticated-orcid":false,"given":"Mohammed","family":"Alzaidi","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, College of Engineering Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia"}]},{"given":"Abdullah","family":"Alzahrani","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, College of Engineering Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9533-3179","authenticated-orcid":false,"given":"Dalia","family":"Elkamchouchi","sequence":"additional","affiliation":[{"name":"Department of Information Technology, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4911-9753","authenticated-orcid":false,"given":"Francisco","family":"Falcone","sequence":"additional","affiliation":[{"name":"Electrical Engineering and Communications Department, Universidad P\u00fablica de Navarra, Campus Arrosad\u00eda, E-31006 Pamplona, Spain"},{"name":"Institute of Smart Cities, Universidad P\u00fablica de Navarra, Campus Arrosad\u00eda, E-31006 Pamplona, Spain"},{"name":"Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey 64849, Mexico"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9387-1950","authenticated-orcid":false,"given":"Sherif","family":"Ghoneim","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, College of Engineering Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2087","DOI":"10.1109\/TMTT.2004.834186","article-title":"Recent system applications of short-pulse ultra-wideband (UWB) technology","volume":"52","author":"Fontana","year":"2004","journal-title":"IEEE Trans. Microw. Theory Techn."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Matin, M.A. (2012). Ultra-Wideband Current Status and Future Trends, Intech Open.","DOI":"10.5772\/2588"},{"key":"ref_3","unstructured":"Galvan-Tejada, G.M., Peyrot-Solis, M.A., and Aguilar, H.J. (2015). Ultra-Wideband Antennas: Design, Methodologies, and Performance, CRC Press."},{"key":"ref_4","unstructured":"FCC (2002). 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