{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,4,13]],"date-time":"2025-04-13T02:15:17Z","timestamp":1744510517794,"version":"3.37.3"},"reference-count":29,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,1,31]],"date-time":"2020-01-31T00:00:00Z","timestamp":1580428800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004860","name":"MMU","doi-asserted-by":"publisher","award":["MMUE-180010, TM R&D"],"id":[{"id":"10.13039\/501100004860","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"A printed compact monopole antenna based on a single negative (SNG) metamaterial is proposed for ultra-wideband (UWB) applications. A low-profile, key-shaped structure forms the radiating monopole and is loaded with metamaterial unit cells with negative permittivity and more than 1.5 GHz bandwidth of near-zero refractive index (NZRI) property. The antenna offers a wide bandwidth from 3.08 to 14.1 GHz and an average gain of 4.54 dBi, with a peak gain of 6.12 dBi; this is in contrast to the poor performance when metamaterial is not used. Moreover, the maximum obtained radiation efficiency is 97%. A reasonable agreement between simulation and experiments is realized, demonstrating that the proposed antenna can operate over a wide bandwidth with symmetric split-ring resonator (SSRR) metamaterial structures and compact size of 14.5 \u00d7 22 mm2 (0.148 \u03bb0 \u00d7 0.226 \u03bb0) with respect to the lowest operating frequency.<\/jats:p>","DOI":"10.3390\/s20030796","type":"journal-article","created":{"date-parts":[[2020,1,31]],"date-time":"2020-01-31T16:55:56Z","timestamp":1580489756000},"page":"796","source":"Crossref","is-referenced-by-count":42,"title":["Compact Ultra-Wideband Monopole Antenna Loaded with Metamaterial"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2852-575X","authenticated-orcid":false,"given":"Samir Salem","family":"Al-Bawri","sequence":"first","affiliation":[{"name":"Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Selangor, Malaysia"},{"name":"Department of Electronics & Communication Engineering, Faculty of Engineering & Petroleum, Hadhramout University, Al-Mukalla 50512, Hadhramout, Yemen"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3220-7631","authenticated-orcid":false,"given":"Hui","family":"Hwang Goh","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering, Guangxi University, Nanning 530004, China"}]},{"given":"Md Shabiul","family":"Islam","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Selangor, Malaysia"}]},{"given":"Hin Yong","family":"Wong","sequence":"additional","affiliation":[{"name":"Faculty of Engineering, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Selangor, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1128-3854","authenticated-orcid":false,"given":"Mohd Faizal","family":"Jamlos","sequence":"additional","affiliation":[{"name":"Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan 26600, Pahang, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9471-9937","authenticated-orcid":false,"given":"Adam","family":"Narbudowicz","sequence":"additional","affiliation":[{"name":"Department of Telecommunications and Teleinformatics, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3870-6773","authenticated-orcid":false,"given":"Muzammil","family":"Jusoh","sequence":"additional","affiliation":[{"name":"Bioelectromagnetics Research Group (BioEM), School of Computer and Communication Engineering, Universiti Malaysia Perlis (UniMAP), Kampus Pauh Putra, Arau 02600, Perlis, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9235-7132","authenticated-orcid":false,"given":"Thennarasan","family":"Sabapathy","sequence":"additional","affiliation":[{"name":"Bioelectromagnetics Research Group (BioEM), School of Computer and Communication Engineering, Universiti Malaysia Perlis (UniMAP), Kampus Pauh Putra, Arau 02600, Perlis, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6536-0339","authenticated-orcid":false,"given":"Rizwan","family":"Khan","sequence":"additional","affiliation":[{"name":"Department of Research and Development, Laird Technologies (M) Sdn Bhd, Penang 13600, Malaysia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4929-3209","authenticated-orcid":false,"given":"Mohammad Tariqul","family":"Islam","sequence":"additional","affiliation":[{"name":"Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi 43600, Selangor, Malaysia"}]}],"member":"1968","published-online":{"date-parts":[[2020,1,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4973","DOI":"10.1109\/TAP.2013.2274262","article-title":"Pattern-reconfigurable planar circular ultra-wideband monopole antenna","volume":"61","author":"Aboufoul","year":"2013","journal-title":"IEEE Trans. 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