{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:23:30Z","timestamp":1760235810310,"version":"build-2065373602"},"reference-count":20,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2021,10,2]],"date-time":"2021-10-02T00:00:00Z","timestamp":1633132800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100011033","name":"Agencia Estatal de Investigaci\u00f3n","doi-asserted-by":"publisher","award":["PID2019-107688RB-C21"],"award-info":[{"award-number":["PID2019-107688RB-C21"]}],"id":[{"id":"10.13039\/501100011033","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents some considerations on the design of a novel antenna consisting of the combination of a transverse stubs (TS) array excited by Ridge Gap Waveguides (RGWs), as well as a discussion of the experimental results obtained from a prototype that was manufactured and measured. A combination of Continuous Transverse Stubs (CTSs) is used as the starting point. Subsequently, the CTSs are modified to include some metallic blockers that split each CTS into a combination (array) of shorter TSs. This is performed in order to excite each individual TS column using a different RGW; thus, ensuring a close to uniform field distribution in the transverse plane of the TS arrays. Hence, the directivity of the antenna is increased. As a series-feed configuration is considered, the antenna keeps a resonant behaviour, having a narrow-band response. A Corporate Feeding Network (CFN) using the aforementioned RGW technology placed in the same layer as the rest of the antenna is included in the design. The radiating area of the antenna is, finally, 5.88\u03bb0\u00d77.12\u03bb0 with a simulated peak gain of 26.2 dBi and a Side Lobe Level (SLL) below \u221213 dB. A prototype is manufactured and tested. The simulated and measured radiation patterns maintain similar shapes to those of the simulations, with very similar angular widths in both main planes, although the frequency corresponding to the highest directivity changes to 31.8 GHz. A matching bandwidth of 517 MHz and a gain of 24.5 is, finally, achieved at that frequency.<\/jats:p>","DOI":"10.3390\/s21196590","type":"journal-article","created":{"date-parts":[[2021,10,10]],"date-time":"2021-10-10T21:37:49Z","timestamp":1633901869000},"page":"6590","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["On the Use of Ridge Gap Waveguide Technology for the Design of Transverse Stub Resonant Antenna Arrays"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3471-1471","authenticated-orcid":false,"given":"Javier","family":"Benavides-Vazquez","sequence":"first","affiliation":[{"name":"Indra Sistemas, S.A., 28850 Torrejon de Ardoz, Spain"},{"name":"Signal Theory and Communications Department, Universidad Carlos III de Madrid, 28911 Leganes, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3946-8095","authenticated-orcid":false,"given":"Jose-Luis","family":"Vazquez-Roy","sequence":"additional","affiliation":[{"name":"Signal Theory and Communications Department, Universidad Carlos III de Madrid, 28911 Leganes, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8012-9802","authenticated-orcid":false,"given":"Eva","family":"Rajo-Iglesias","sequence":"additional","affiliation":[{"name":"Signal Theory and Communications Department, Universidad Carlos III de Madrid, 28911 Leganes, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,2]]},"reference":[{"key":"ref_1","unstructured":"Milroy, W.W. (1991, January 25\u201327). The Continuous Transverse (CTS) array: Basic theory, experiment, and application. Proceedings of the Antenna Applications Symposium, Monticello, IL, USA."},{"key":"ref_2","unstructured":"Milroy, W.W. (1991). Continuous Transverse Stub Element Devices and Methods of Making Same. (US5266961A), U.S. Patent."},{"key":"ref_3","unstructured":"Henderson, W.H., and Milroy, W.W. (2005, January 3\u20137). Wireless communication applications of the continuous transverse stub (CTS) array at microwave and millimeter wave frequencies. Proceedings of the IEEE\/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, Honolulu, HI, USA."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"900","DOI":"10.1049\/iet-map.2013.0081","article-title":"Study of Q-factors of ridge and groove gap waveguide resonators","volume":"7","author":"Pucci","year":"2013","journal-title":"IET Microw. Antennas Propag."},{"key":"ref_5","unstructured":"Milroy, W., Coppedge, S., Ekmekji, A., Hashemi-Yeganeh, S., and Buczeks, S. (2006). True-Time-Delay Feed Network for CTS Array. (2006\/0202899 A1), U.S. Patent."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Ettorre, M., Foglia Manzillo, F., Casaletti, M., Sauleau, R., and Capet, N. (2015, January 19\u201324). A compact and high-gain Ka-band multibeam continuous transverse stub antenna. Proceedings of the 2015 IEEE International Symposium on Antennas and Propagation USNC\/URSI National Radio Science Meeting, Vancouver, BC, Canada.","DOI":"10.1109\/APS.2015.7304722"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1049\/iet-map.2010.0089","article-title":"Design and experimental verification of ridge gap waveguide in bed of nails for parallel-plate mode suppression","volume":"5","author":"Kildal","year":"2011","journal-title":"IET Microw. Antennas Propag."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"14","DOI":"10.1109\/MCOM.2018.1700998","article-title":"Gap Waveguide Technology for Millimeter-Wave Antenna Systems","volume":"56","author":"Zaman","year":"2018","journal-title":"IEEE Commun. Mag."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1109\/LAWP.2008.2011147","article-title":"Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates","volume":"8","author":"Kildal","year":"2009","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2695","DOI":"10.1109\/TAP.2007.915442","article-title":"Electromagnetic Characterization of Textured Surfaces Formed by Metallic Pins","volume":"56","author":"Silveirinha","year":"2008","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Zaman, A.U., and Kildal, P.S. (2012, January 26\u201330). Slot antenna in ridge gap waveguide technology. Proceedings of the 2012 6th European Conference on Antennas and Propagation (EUCAP), Prague, Czech Republic.","DOI":"10.1109\/EuCAP.2012.6206129"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1650","DOI":"10.1109\/TAP.2018.2888730","article-title":"A Slot Array Antenna With Single-Layered Corporate-Feed Based on Ridge Gap Waveguide in the 60 GHz Band","volume":"67","author":"Liu","year":"2019","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2905","DOI":"10.1109\/TAP.2016.2565682","article-title":"Design and Fabrication of a High-Gain 60-GHz Corrugated Slot Antenna Array with Ridge Gap Waveguide Distribution Layer","volume":"64","author":"Zarifi","year":"2016","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Benavides-Vazquez, J., Vazquez-Roy, J.L., and Rajo-Iglesias, E. (2020, January 15\u201320). High-gain Resonant Continuous Transverse Stub Array Using Ridge Gap-Waveguide Technology. Proceedings of the 2020 14th European Conference on Antennas and Propagation (EuCAP), Copenhagen, Denmark.","DOI":"10.23919\/EuCAP48036.2020.9135386"},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Dom\u00ednguez, A.T., Gonz\u00e1lez, J.M.F., Alonso, J.M.I., and Sierra-P\u00e9rez, M. (2016, January 10\u201315). Design proposal for Ridge Gap Waveguide and comparison with other technologies in Ka to W bands. Proceedings of the 2016 10th European Conference on Antennas and Propagation (EuCAP), Davos, Switzerland.","DOI":"10.1109\/EuCAP.2016.7481554"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2992","DOI":"10.1109\/TAP.2014.2309970","article-title":"Wide-Band Slot Antenna Arrays With Single-Layer Corporate-Feed Network in Ridge Gap Waveguide Technology","volume":"62","author":"Zaman","year":"2014","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_17","unstructured":"Syst\u00e8mes, D. (2021, August 15). Electromagnetic Simulation Solvers. Available online: https:\/\/www.3ds.com\/products-services\/simulia\/products\/cst-studio-suite\/solvers\/."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"76673","DOI":"10.1109\/ACCESS.2018.2883590","article-title":"Wideband Full-Corporate-Feed Waveguide Continuous Transverse Stub Antenna Array","volume":"6","author":"You","year":"2018","journal-title":"IEEE Access"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"4792","DOI":"10.1109\/TAP.2015.2479243","article-title":"Continuous Transverse Stub Array for Ka-Band Applications","volume":"63","author":"Ettorre","year":"2015","journal-title":"IEEE Trans. Antennas Propag."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"6307","DOI":"10.1109\/TAP.2017.2712791","article-title":"A Low-Profile Broadband 32-Slot Continuous Transverse Stub Array for Backhaul Applications in E -Band","volume":"65","author":"Potelon","year":"2017","journal-title":"IEEE Trans. Antennas Propag."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/19\/6590\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:08:43Z","timestamp":1760166523000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/19\/6590"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,10,2]]},"references-count":20,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2021,10]]}},"alternative-id":["s21196590"],"URL":"https:\/\/doi.org\/10.3390\/s21196590","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2021,10,2]]}}}