Windows account for a significant portion of the building energy loss. Conventional low-emissivity (low-E) glass, despite its efficacy in reducing infrared radiation for thermal insulation, fails to dissipate solar heat, resulting in a deteriorated cooling performance during summer. Besides, modern architectural environments demand not only efficient thermal regulation but also enhanced wireless communication performance across multiple frequency bands. In this paper, we propose a multifunctional metasurface window (meta-window) that simultaneously achieves dual-frequency microwave signal enhancement, passive radiative cooling, and high visible transparency.
