{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T11:53:04Z","timestamp":1777722784702,"version":"3.51.4"},"reference-count":19,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2023,5,30]],"date-time":"2023-05-30T00:00:00Z","timestamp":1685404800000},"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 article, a miniaturized antenna is proposed for 4G\/5G multiple input, multiple output (MIMO) applications for smartphones. The proposed antenna is composed of an inverted L-shaped antenna with decoupled elements to cover 4G (2000\u20132600 MHz), and a planar inverted-F antenna (PIFA) with a J-slot to cover 5G (3400\u20133600 MHz and 4800\u20135000 MHz). Furthermore, to achieve the purposes of miniaturization and decoupling, the structure adopts a feeding stub, shorting stub, and outstanding floor, additionally adding the slot to the PIFA, to generate additional frequency bands. Due to the advantages such as multiband operation, MIMO configuration for 5G communications, high isolation, and a compact structure, the proposed antenna design is attractive for 4G\/5G smartphones. The antenna array is printed on an FR4 dielectric board, measuring 140 \u00d7 70 \u00d7 0.8 mm3, with the 4G antenna located on a top 15 mm-long headroom.<\/jats:p>","DOI":"10.3390\/s23115186","type":"journal-article","created":{"date-parts":[[2023,5,30]],"date-time":"2023-05-30T03:02:23Z","timestamp":1685415743000},"page":"5186","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["MIMO 5G Smartphone Antenna with Tri-Band and Decoupled Elements"],"prefix":"10.3390","volume":"23","author":[{"given":"Jianqiang","family":"Hou","sequence":"first","affiliation":[{"name":"The School of Electronic Engineering, Xidian University, Xi\u2019an 710071, China"}]},{"given":"Yuxuan","family":"Peng","sequence":"additional","affiliation":[{"name":"The School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2484-7495","authenticated-orcid":false,"given":"Jiajun","family":"Huang","sequence":"additional","affiliation":[{"name":"The School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5198-1556","authenticated-orcid":false,"given":"Zhefei","family":"Wang","sequence":"additional","affiliation":[{"name":"The School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China"}]},{"given":"Tayeb A.","family":"Denidni","sequence":"additional","affiliation":[{"name":"Institut National de la Recherche Scientifique, Universit\u00e9 du Quebec, Montreal, QC H5A1K6, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2023,5,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"7225","DOI":"10.1109\/TAP.2019.2930119","article-title":"Integrated Frequency-Reconfigurable Slot Antenna and Connected Slot Antenna Array for 4G and 5G Mobile Handsets","volume":"67","author":"Ikram","year":"2019","journal-title":"IEEE Trans. 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