{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:09:42Z","timestamp":1760058582415,"version":"build-2065373602"},"reference-count":33,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2025,4,11]],"date-time":"2025-04-11T00:00:00Z","timestamp":1744329600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004837","name":"MCIN\/AEI\/10.13039\/501100011033","doi-asserted-by":"publisher","award":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"],"award-info":[{"award-number":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100020636","name":"EU (European Union) \u201cNextGenerationEU\u201d\/PRTR","doi-asserted-by":"publisher","award":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"],"award-info":[{"award-number":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"]}],"id":[{"id":"10.13039\/501100020636","id-type":"DOI","asserted-by":"publisher"}]},{"name":"FCT\/MECI","award":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"],"award-info":[{"award-number":["PID2020-114172RB-C21","PID2023-146246OB-C32","TED2021-130650B-C22","FPU20\/07267","UID\/50008"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Applied Sciences"],"abstract":"<jats:p>A mechanical beam-scanning reflectarray (RA) antenna is presented for Ka band. The 1D steering of the beam is achieved through linear in-plane panel translations, which can be implemented at low cost using a rail-mounted moving RA panel. Compared to related works, a highly uniform beam level is achieved with a remarkably compact antenna profile. A new technique is also proposed to mitigate the high side lobes caused by the compact antenna optics, achieving an estimated 2.3 dB reduction in maximum SLL. The manufactured prototype has a panel size of 256.4 by 187.2 mm with 2898 elements, and an F\/D of only 0.47. A measured scan loss of 1.1 dB is achieved over a 45-degree scanning range. The measured gain is 31.6 dBi and the aperture efficiency is 24.7% at the design frequency of 29.5 GHz, with SLL between \u22129.4 and \u221217.5 dB. In-band measurements show a 1 dB bandwidth from 28 to over 32 GHz (11.9%).<\/jats:p>","DOI":"10.3390\/app15084244","type":"journal-article","created":{"date-parts":[[2025,4,11]],"date-time":"2025-04-11T10:05:51Z","timestamp":1744365951000},"page":"4244","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Compact Beam-Scanning Reflectarray Antenna with SLL Reduction Using In-Plane Panel Translations"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2916-7923","authenticated-orcid":false,"given":"Andr\u00e9s","family":"G\u00f3mez-\u00c1lvarez","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Group of Signal Theory and Communications, University of Oviedo, 33203 Gij\u00f3n, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4398-157X","authenticated-orcid":false,"given":"S\u00e9rgio A.","family":"Matos","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es and the Departamento de Ci\u00eancias e Tecnologias da Informa\u00e7ao, Instituto Universit\u00e1rio de Lisboa (Iscte-IUL), 1649-026 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2487-121X","authenticated-orcid":false,"given":"Manuel","family":"Arrebola","sequence":"additional","affiliation":[{"name":"Department of Signals, Systems and Radiocommunications, Group of Applied Electromagnetics, Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7468-3084","authenticated-orcid":false,"given":"Marcos R.","family":"Pino","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Group of Signal Theory and Communications, University of Oviedo, 33203 Gij\u00f3n, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5332-842X","authenticated-orcid":false,"given":"Carlos A.","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Instituto de Telecomunica\u00e7\u00f5es, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.actaastro.2019.03.040","article-title":"A technical comparison of three low earth orbit satellite constellation systems to provide global broadband","volume":"159","author":"Cameron","year":"2019","journal-title":"Acta Astronaut."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Merino-Fernandez, I., Khemchandani, S.L., del Pino, J., and Saiz-Perez, J. 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