Filter-Assisted Metasurface for Full-Space Wavefront Manipulation and Energy Allocation

Abstract

Tailoring electromagnetic waves in full space is a significant issue enabling diverse functionalities for wireless communications. Classical approaches using tunable materials can achieve intensity modulation but lack phase modulation. In this paper, we present a general strategy for simultaneous wavefront manipulation and energy allocation by introducing a filter layer into the metasurface design. By adjusting the filter layer with different impedances, an energy allocation with a desired wavefront could be switched smoothly from transmission to reflection mode. Numerical simulations and experimental measurements are performed to verify the effectiveness of the proposed strategy. As a practical example, a high-gain bifunctional transmit/reflect array is experimentally demonstrated with excellent performance.