{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,27]],"date-time":"2026-01-27T11:38:01Z","timestamp":1769513881795,"version":"3.49.0"},"reference-count":26,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T00:00:00Z","timestamp":1624320000000},"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>This paper presents a low-cost architecture that allows for beamforming with antenna arrays installed onto unmanned aerial vehicles (UAVs). Beam switching is proposed to improve the antenna gain towards the ground station with two three-element arrays installed below the wings of the UAV. The electromagnetic modeling of the complete structure (UAV and integrated antennas) was performed with commercial electromagnetic simulator Ansys HFSS. The radiation patterns were synthesized with particle swarm optimization (PSO). By employing lumped surface-mount device (SMD) components and switches, the design of the feeder to deliver proper excitation coefficients to the antennas is presented, and its performance was assessed by simulations. The proposed approach is demonstrated to be very effective with low-cost production.<\/jats:p>","DOI":"10.3390\/s21134265","type":"journal-article","created":{"date-parts":[[2021,6,22]],"date-time":"2021-06-22T22:10:59Z","timestamp":1624399859000},"page":"4265","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Low-Cost Beamforming Concept for the Control of Radiation Patterns of Antenna Arrays Installed onto UAVs"],"prefix":"10.3390","volume":"21","author":[{"given":"Leonardo C.","family":"dos Santos","sequence":"first","affiliation":[{"name":"Laboratory of Electromagnetics, Microwaves and Antennas\u2014LEMA, Federal University of Pampa\u2014UNIPAMPA, Alegrete 97546-550, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5571-7728","authenticated-orcid":false,"given":"Edson R.","family":"Schlosser","sequence":"additional","affiliation":[{"name":"Laboratory of Electromagnetics, Microwaves and Antennas\u2014LEMA, Federal University of Pampa\u2014UNIPAMPA, Alegrete 97546-550, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6983-7760","authenticated-orcid":false,"given":"Marcos V. 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Proceedings of the 2010 Loughborough Antennas and Propagation Conference, Loughborough, UK.","DOI":"10.1109\/LAPC.2010.5666169"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Ibrahim, M., Deif, S., and Sharawi, M.S. (2012, January 12\u201313). A 14-element printed planar antenna array embedded within a UAV structure. Proceedings of the Loughborough Antennas and Propagation Conference, Loughborough, UK.","DOI":"10.1109\/LAPC.2012.6402996"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1362","DOI":"10.3390\/s21041362","article-title":"An Efficient Conformal Stacked Antenna Array Design and 3D-Beamforming for UAV and Space Vehicle Communications","volume":"21","author":"Albagory","year":"2021","journal-title":"Sensors"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"601","DOI":"10.1109\/LAWP.2019.2897380","article-title":"A Compact Tri-Band Horizontally Polarized Omnidirectional Antenna for UAV Applications","volume":"18","author":"Cui","year":"2019","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1581","DOI":"10.1109\/LAWP.2020.3011412","article-title":"Wide-Scanning Conformal Phased Array Antenna for UAV Radar Based on Polyimide Film","volume":"19","author":"Peng","year":"2020","journal-title":"IEEE ANtennas Wirel. Propag. Lett."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"697","DOI":"10.2528\/PIER13021808","article-title":"A planar printed antenna array embedded in the wing structure of a UAV for communication link enhancement","volume":"138","author":"Sharawi","year":"2013","journal-title":"Prog. Electromagn. Res."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Sharawi, M.S., Rawashdeh, O.A., and Aloi, D.N. (2010, January 26\u201328). Performance of an embedded monopole antenna array in a UAV wing structure. Proceedings of the IEEE Mediterranean Electrotechnical Conference, Valletta, Malta.","DOI":"10.1109\/WAMICON.2010.5461886"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"535","DOI":"10.1109\/TAP.2013.2289999","article-title":"Electrically small UAV antenna design using characteristic modes","volume":"62","author":"Chen","year":"2014","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Macnamara, T. (2010). Introduction to Antenna Placement and Installation, John Wiley and Sons.","DOI":"10.1002\/9780470686874"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Heckler, M.V.T., Greda, L.A., and Dreher, A. (2008, January 5\u201311). Analysis of a navigation antenna installed on a civil airplane. Proceedings of the 2008 IEEE Antennas and Propagation Society International Symposium, San Diego, CA, USA.","DOI":"10.1109\/APS.2008.4619630"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1833","DOI":"10.1109\/TAP.2007.898602","article-title":"Domain decomposition method based on generalized scattering matrix for installed performance of antennas on aircraft","volume":"55","author":"Barka","year":"2007","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Thain, A., Peres, G., Estienne, J.-P., Sylv, G., Cailleu, P., Benjamin, P., Terrasse, I., Piau, G.-P., and Sabanowski, G. (2007, January 11\u201316). Numerical modelling of aircraft antenna installations. Proceedings of the European Conference on Antennas and Propagation, Edinburgh, UK.","DOI":"10.1049\/ic.2007.0853"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1016\/j.ast.2012.05.002","article-title":"Performance of microstrip antenna arrays installed on aircraft","volume":"26","author":"Heckler","year":"2005","journal-title":"Aerosp. Sci. Technol."},{"key":"ref_15","unstructured":"Heckler, M.V.T., and Dreher, A. (2005, January 3\u20138). Analysis of monopoles installed on airframes. Proceedings of the IEEE Antennas and Propagation Society International Symposium, Washington, DC, USA."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2292","DOI":"10.1049\/iet-map.2018.5097","article-title":"Optimisation of antenna arrays installed on non-conductive unmanned aerial vehicle","volume":"12","author":"Yoshimoto","year":"2018","journal-title":"IET Microw. Antennas Propag."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Rizwan, A., Biswas, D., and Ramachandra, V. (2017, January 24\u201326). Impact of UAV structure on antenna radiation patterns at different frequencies. Proceedings of the 2017 IEEE International Conference on Antenna Innovations and Modern Technologies for Ground, Aircraft and Satellite Applications (iAIM), Bangalore, India.","DOI":"10.1109\/IAIM.2017.8402597"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1139","DOI":"10.1109\/LAWP.2019.2911019","article-title":"Extreme Offset-Fed Reflectarray Antenna for Compact Deployable Platforms","volume":"18","author":"Samaiyar","year":"2019","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_19","unstructured":"Pozar, D.M. (2005). Microwave Engineering, John Wiley and Sons. [3rd ed.]."},{"key":"ref_20","unstructured":"Silva, L.L., Vieira, J.M., Yoshimoto, E., and Heckler, M.V.T. (October, January 29). Study of phase-shifters in S-Band using lumped elements. Proceedings of the XXXVII Brazilian Telecommunications Symposium, Petr\u00f3polis, Brazil."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"350","DOI":"10.3390\/s20020350","article-title":"Geometrical Synthesis of Sparse Antenna Arrays Using Compressive Sensing for 5G IoT Applications","volume":"20","author":"Buttazzoni","year":"2020","journal-title":"Sensors"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"2048","DOI":"10.3390\/s20072048","article-title":"Beamforming Optimization in Internet of Things Applications Using Robust Swarm Algorithm in Conjunction with Connectable and Collaborative Sensors","volume":"20","author":"Hasan","year":"2020","journal-title":"Sensors"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1109\/TAP.2004.823969","article-title":"Particle swarm optimization in electromagnetics","volume":"52","author":"Robinson","year":"2004","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"141562","DOI":"10.1109\/ACCESS.2019.2944471","article-title":"Beamsteering and beamshaping using a linear antenna array based on particle swarm optimization","volume":"7","author":"Greda","year":"2019","journal-title":"IEEE Access"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1016\/j.aeue.2019.06.020","article-title":"ASIP development of a real-time control module for a retrodirective antenna array","volume":"109","author":"Engroff","year":"2019","journal-title":"AEU Int. J. Electron. Commun."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"442","DOI":"10.1049\/iet-map.2015.0269","article-title":"Synthesis and implementation aspects of linear antenna arrays with shaped radiation pattern for mobile communications","volume":"10","author":"Schlosser","year":"2016","journal-title":"IET Microwav. Antennas Propag."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/13\/4265\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:20:53Z","timestamp":1760163653000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/13\/4265"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,6,22]]},"references-count":26,"journal-issue":{"issue":"13","published-online":{"date-parts":[[2021,7]]}},"alternative-id":["s21134265"],"URL":"https:\/\/doi.org\/10.3390\/s21134265","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,6,22]]}}}