{"title":"A dual-band dual-circularly polarized structure reused shared-aperture antenna with high aperture efficiency for satellite communications","authors":"","doi":"10.1016/j.aeue.2024.155426","DOIUrl":null,"url":null,"abstract":"<div><p>A novel S/Ka dual-band dual-circularly polarized (CP) shared-aperture antenna is proposed in this paper. In the Ka-band, the reflectarray adopts two distinct CP elements, both of which achieve 360° phase shift and linear phase response in the wideband. In the S-band, the radiation array adopts a 4 × 4 units cut-corner square patch to achieve CP performance. Additionally, a steerable beam is achieved through a phase shift feeding network. To effectively improve the antenna aperture utilization and efficiency, the S-band radiator is reused as a part of the Ka-band reflecting ground to realize the aperture-sharing. Experimental results demonstrate that the S-band operating bandwidth covers 2.35–2.7 GHz, achieving a peak gain of 18.6 dBic and an aperture efficiency of 89.2 %. Furthermore, the S-band enables ± 30° beam steering. In the Ka-band, the operating bandwidth covers 28–32 GHz, with a measured 2-dB axial ratio bandwidth is 10.3 %, a peak gain of 37.5 dBic, and an aperture efficiency of 48.1 %. Therefore, a dual-band dual-CP shared-aperture antenna with high aperture efficiency is realized. The antenna offers beam steering in the S-band and wideband capabilities in the Ka-band, making it a valuable candidate for satellite communication systems.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aeu-International Journal of Electronics and Communications","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1434841124003121","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A novel S/Ka dual-band dual-circularly polarized (CP) shared-aperture antenna is proposed in this paper. In the Ka-band, the reflectarray adopts two distinct CP elements, both of which achieve 360° phase shift and linear phase response in the wideband. In the S-band, the radiation array adopts a 4 × 4 units cut-corner square patch to achieve CP performance. Additionally, a steerable beam is achieved through a phase shift feeding network. To effectively improve the antenna aperture utilization and efficiency, the S-band radiator is reused as a part of the Ka-band reflecting ground to realize the aperture-sharing. Experimental results demonstrate that the S-band operating bandwidth covers 2.35–2.7 GHz, achieving a peak gain of 18.6 dBic and an aperture efficiency of 89.2 %. Furthermore, the S-band enables ± 30° beam steering. In the Ka-band, the operating bandwidth covers 28–32 GHz, with a measured 2-dB axial ratio bandwidth is 10.3 %, a peak gain of 37.5 dBic, and an aperture efficiency of 48.1 %. Therefore, a dual-band dual-CP shared-aperture antenna with high aperture efficiency is realized. The antenna offers beam steering in the S-band and wideband capabilities in the Ka-band, making it a valuable candidate for satellite communication systems.
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