ArticleScientific reports2026
Ultra-wideband reflective polarization rotator achieving 104% measured bandwidth with high-efficiency multi-state polarization control.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors.
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Abstract
This article introduces a compact ultra-wideband reflective polarization rotator, covering 12.68-38.79 GHz, which offers notable linear-to-elliptical, linear, and circular polarization conversion. The metasurface comprises a semi-octa-circular copper layout on an F4BM220 substrate with a unit cell size of 5mm×5mm×2mm backed by a ground plane, configured to facilitate four strong resonances enabling highly precise polarization rotation within Ku, K, and Ka bands. Unlike traditional symmetric polarization rotators, the proposed hybrid octa-circular geometry incorporates a rectangular cutout that triggers Omega-type bianisotropy, extending the operational fractional bandwidth to 104%. Full-wave simulations exhibit a -10 dB rotational bandwidth (RBW) of 112.16% using Generalized Sheet Transition Conditions (GSTC) analysis, while experimental measurements of the fabricated 60× 60 unit cell array feature an RBW of 104.76%, demonstrating superior real-world performance. The rotator sustains polarization conversion efficiency exceeding 91% and exhibits stable functionality for oblique incidence up to 30[Formula: see text]. Concordance between theory and experimental observations is validated through CST-analysis, Bi-Mode Foster Equivalent Circuit analysis, and laboratory measurements. Ultra-wideband operation, compact size, strong resonances, high PCR, and multi-state polarization response highlight the novelty of the design and ensure suitability for radar imaging, sensing, satellite communications, and emerging 6G systems.
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