Reconfigurable reflective metasurfaces (RRMs) have garnered significant attention due to their capability to control reflection characteristics. While conventional metasurfaces manipulate the phase and amplitude of the reflected beam through the arrangement of sub-wavelength scatterers in a periodic array, achieving dynamic manipulation typically necessitates external stimuli. Alternatively, spatial modulation within a metasurface introduces gaps in the metastrips, enabling a spatial phase shift across the reflected beam and facilitating real-time beam steering and shaping. This paper proposes a novel power screw-assisted reconfigurable reflective metasurface for achieving beam control and spatial modulation. The design integrates a power screw into the metasurface structure, providing controlled displacement and continuous beam scanning capabilities. Experimental results demonstrate that the proposed metasurface can scan from ±32° to ±15° at 28 GHz. Unlike current designs requiring complex external control systems for beam scanning, this approach offers a simpler yet powerful method for real-time control of the reflected beam. The novelty of this work lies in the integration of the power screw mechanism, presenting a promising advancement in the field of reconfigurable reflective metasurfaces with potential applications in communication systems, energy harvesting, and adaptive optics.

中文翻译：

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具有空间调制的动力螺杆辅助可重构反射超表面

可重构反射超表面（RRM）由于其控制反射特性的能力而引起了广泛关注。虽然传统的超表面通过周期性阵列中的亚波长散射体的排列来操纵反射光束的相位和幅度，但实现动态操纵通常需要外部刺激。或者，超表面内的空间调制在超带中引入间隙，从而实现反射光束上的空间相移并促进实时光束转向和整形。本文提出了一种新型动力螺杆辅助可重构反射超表面，用于实现光束控制和空间调制。该设计将动力螺杆集成到超表面结构中，提供受控位移和连续光束扫描功能。实验结果表明，所提出的超表面可以在 28 GHz 下扫描 ±32° 至 ±15°。与当前的设计需要复杂的外部控制系统来进行光束扫描不同，这种方法提供了一种更简单但功能强大的方法来实时控制反射光束。这项工作的新颖性在于动力螺杆机构的集成，在可重构反射超表面领域呈现出有前景的进步，在通信系统、能量收集和自适应光学方面具有潜在的应用。