{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T15:00:10Z","timestamp":1777734010639,"version":"3.51.4"},"reference-count":30,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2020,12,5]],"date-time":"2020-12-05T00:00:00Z","timestamp":1607126400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"TUBITAK","award":["114E494"],"award-info":[{"award-number":["114E494"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this paper, a wideband four port 2\u20136 GHz antenna is proposed. One-, two-, and four-port antennas are implemented and characterized between 2 and 6 GHz. The isolation between the ports is improved by connecting and optimizing the ground plane sections. The results show that the antennas\u2019 reflection coefficients are better than 10 dB in the frequency band. The measured isolation between the ports is greater than 15 dB (between 2.3 and 6 GHz) and 10 dB in the whole band for two- and four-port antennas, respectively, however, it is more than 20 dB around 2.4 and 5\u20136 GHz for both antennas. The calculated correlation coefficient between ports is below \u221230 dB (&gt;2.14 GHz) and \u221215 dB for the two- and four-port antennas, respectively. The measured gain and efficiency scale are 3.1\u20136.75 dBi and 62\u201398%, respectively. To the best of our knowledge, an antenna both being wideband from 2 to 6 GHz and having independent four ports is only addressed in this work. The four-port antenna can be used for MIMO systems or smartphones operating on many wireless systems simultaneously such as 3G\/4G\/5G Sub-6 GHz and WLAN including the next generation WiFi7 with full-duplex operation.<\/jats:p>","DOI":"10.3390\/s20236960","type":"journal-article","created":{"date-parts":[[2020,12,7]],"date-time":"2020-12-07T21:37:42Z","timestamp":1607377062000},"page":"6960","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Wideband Multiport Antennas"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4784-8872","authenticated-orcid":false,"given":"Mehdi","family":"Seyyedesfahlan","sequence":"first","affiliation":[{"name":"Microwaves and Antennas Group (MAG), EPFL, CH-1015 Lausanne, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdulkadir","family":"Uzun","sequence":"additional","affiliation":[{"name":"Electronics Engineering, Sabanci University, 34956 Istanbul, Turkey"},{"name":"ASELSAN A.\u015e., 34906 Istanbul, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anja K.","family":"K. Skrivervik","sequence":"additional","affiliation":[{"name":"Microwaves and Antennas Group (MAG), EPFL, CH-1015 Lausanne, Switzerland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5716-1348","authenticated-orcid":false,"given":"Ibrahim","family":"Tekin","sequence":"additional","affiliation":[{"name":"Electronics Engineering, Sabanci University, 34956 Istanbul, Turkey"},{"name":"Sabanci University Nanotechnology and Application Center (SUNUM), 34956 Istanbul, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,12,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1109\/MCOM.2002.1031841","article-title":"A Fourth Generation MIMO-OFDM Broadband Wireless System: Design, Performance, and Field Trial Results","volume":"40","author":"Sampath","year":"2002","journal-title":"IEEE Commun. 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