Broadband Low-Profile and Flexible Metasurface for Enhancing Signal Transmission Through Glass Curtain Walls

This paper presents a broadband, low-profile metasurface designed to enhance signal transmission through glass curtain walls. Utilizing wave matrix theory, the metasurface achieves a conjugate impedance match between air and glass, effectively minimizing reflection loss. The proposed metasurface features a three-layer cascaded structure, achieving a -3 dB bandwidth spanning 5.75-8.16 GHz, corresponding to a relative wide bandwidth of 34.6%. Notably, the transmission coefficient reaches -0.594 dB at 7 GHz, demonstrating minimal insertion loss across the operational band. Simulation results reveal a transmission enhancement exceeding 2 dB across a broad frequency range compared to the scenario without the metasurface. With a flexible substrate, the metasurface offers mechanical adaptability, and its ultrathin profile of 0.058λ ensures seamless scalability for large-scale 5G/6G deployments in next-generation wireless networks.