Broadband High-Efficiency Ultrathin Metasurfaces With Simultaneous Independent Control of Transmission and Reflection Amplitudes and Phases

IF 4.1 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Microwave Theory and Techniques Pub Date : 2021-10-21 DOI:10.1109/TMTT.2021.3119376

Yufang Wang;Yuehe Ge;Zhizhang Chen;Xin Liu;Jixiong Pu;Kaiting Liu;Huanyang Chen;Yang Hao

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引用次数: 28

Abstract

We demonstrate a broadband near-100%-efficiency ultrathin metasurface operating at microwave and millimeter-wave frequencies. We develop and employ two orthogonally polarized metallic gratings to form a Fabry–Perot cavity and incorporate a subwavelength metallic double-split-ring resonator at the center of each unit cell. It allows arbitrary amplitude-phase combinations with no coupling between amplitude and phase or between transmitted and reflected waves, leading to the design of an ultrathin but highly efficient broadband metasurface with multiple functionalities. Furthermore, the proposed metasurface can generate diffractive beams with different orders and vortex beams with different orbital angular momentum (OAM) modes in reflection and transmission spaces simultaneously. Both numerical and experimental results verify that the proposed metasurface has superior performance to its counterparts that are based solely on phase control. The proposed metasurface presents a lightweight, low-cost, and easily deployable flat device for microwave and millimeter-wave applications.

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同时独立控制透射和反射振幅和相位的宽带高效超薄超表面

我们展示了一种在微波和毫米波频率下工作的接近100%效率的宽带超薄超表面。我们开发并使用两个正交偏振的金属光栅来形成法布里-珀罗腔，并在每个晶胞的中心加入一个亚波长金属双开口环谐振器。它允许任意振幅-相位组合，振幅和相位之间或发射波和反射波之间没有耦合，从而设计出具有多种功能的超薄但高效的宽带超表面。此外，所提出的元表面可以在反射和透射空间中同时产生具有不同阶数的衍射光束和具有不同轨道角动量（OAM）模式的涡旋光束。数值和实验结果都证实，与仅基于相位控制的元表面相比，所提出的元表面具有优越的性能。所提出的元表面为微波和毫米波应用提供了一种重量轻、成本低、易于部署的平面设备。

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来源期刊

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.

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