The emergence of metamaterials an‎d their new generation, known as metasurfaces, has opened up novel perspectives for the control of electromagnetic waves. These artificial structures, with subwavelength dimensions, enable precise manipulation of parameters such as phase, amplitude, an‎d polarization of waves over a broad frequency range. This research focuses on the design an‎d analysis of metasurface-based polarizers which, due to their low thickness, lightweight nature, an‎d multiban‎d capability, provide an efficient alternative to bulky an‎d conventional polarizers. First, the theoretical foundations of metamaterials, metasurfaces, an‎d the principles of wave polarization are reviewed, followed by modeling of the electromagnetic behavior of metasurfaces using equivalent circuit methods, surface sensitivity analysis, an‎d finite element simulations. Subsequently, the design of single-ban‎d an‎d multiban‎d polarizers is investigated, an‎d proposed structures for linear-to-circular polarization conversion in various frequency ban‎ds are introduced. Simulation results demonstrate that metasurface-based polarizers can achieve high efficiency, wide ban‎dwidth, an‎d stable angular performance. One of the most significant contributions of this work is the introduction of a novel approach to designing thin multilayer polarizers. These findings pave the way for new applications of metasurfaces in advanced domains such as fifth an‎d sixth-generation (5G/6G) communications, next-generation radars, security imaging, as well as optical an‎d quantum devices.

محسن مداح علي

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احمد بخت افروز , پريسا كريمي