{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T06:17:47Z","timestamp":1762409867592,"version":"build-2065373602"},"reference-count":25,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,2,7]],"date-time":"2021-02-07T00:00:00Z","timestamp":1612656000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100011665","name":"Deanship of Scientific Research, King Saud University","doi-asserted-by":"publisher","award":["Researchers Supporting Project number (RSP-2020\/46)"],"award-info":[{"award-number":["Researchers Supporting Project number (RSP-2020\/46)"]}],"id":[{"id":"10.13039\/501100011665","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A Rotman lens is a wideband true-time delay device. Due to its simplistic structure with wave\/signal routing capabilities, it has been widely utilized as a beamforming device in numerous communication systems. Since the basic Rotman lens design incorporates multiple input, output, and dummy ports, in this study, and for the first time, we utilized a Rotman lens as a sensor. The main idea was to gather abundant information from available Rotman lens ports to obtain better sensing performance. The realized lens is optimized to work in the millimeter wave (mmW) band from 27 to 29 GHz with a focus on a central frequency of 28 GHz. The design has a footprint of 140 \u00d7 103 \u00d7 0.8 mm3. The polarity correlator was used to characterize the material under investigation.<\/jats:p>","DOI":"10.3390\/s21041163","type":"journal-article","created":{"date-parts":[[2021,2,10]],"date-time":"2021-02-10T04:33:46Z","timestamp":1612931626000},"page":"1163","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["mmW Rotman Lens-Based Sensing: An Investigation Study"],"prefix":"10.3390","volume":"21","author":[{"given":"Waleed T.","family":"Sethi","sequence":"first","affiliation":[{"name":"Faculty of Electrical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Swabi 23640, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0485-9117","authenticated-orcid":false,"given":"Ahmed B.","family":"Ibrahim","sequence":"additional","affiliation":[{"name":"KACST-TIC in Radio Frequency and Photonics (RFTONICS), King Saud University, Riyadh 11421, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6064-6733","authenticated-orcid":false,"given":"Khaled","family":"Issa","sequence":"additional","affiliation":[{"name":"Laboratory of Electronics and Microelectronics, Department of Physics, Faculty of Sciences of Monastir, University of Monastir, Monastir 5000, Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Saleh A.","family":"Alshebeili","sequence":"additional","affiliation":[{"name":"Electrical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,7]]},"reference":[{"key":"ref_1","unstructured":"(1989). 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