Ambient-energy-driven space-time-coding metasurface for space-frequency-division multiplexing wireless communications
环境能量驱动的空时编码超表面，用于空频分复用无线通信
周囲エネルギー駆動型時空間符号化メタサーフェスを用いた空間周波数分割多重無線通信
주변 에너지 구동형 공간-시간 코딩 메타표면을 이용한 공간-주파수 분할 다중화 무선 통신
Superficie metas de codificación espacio-temporal impulsada por energía ambiental para comunicaciones inalámbricas de multiplexación por división de espacio y frecuencia
Métasurface à codage spatio-temporel alimentée par l'énergie ambiante pour les communications sans fil multiplexées par division spatiale et fréquentielle
Метаповерхность с пространственно-временным кодированием, приводимая в действие энергией окружающей среды, для беспроводной связи с пространственно-частотным разделением каналов
Han Wei Tian 田翰闱 ¹, Chao Song 宋超 ¹, Dong Jie Wang 王东杰 ¹, Qian Zhu 朱潜 ¹, Tie Jun Cui 崔铁军 ¹, Wei Xiang Jiang 蒋卫祥 ¹ ²
¹ State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
中国 南京 东南大学信息科学与工程学院 毫米波国家重点实验室
² Purple Mountain Laboratories, Nanjing 211111, China
中国 南京 紫金山实验室
Programmable metasurfaces have shown exceptional potentials in wireless communications due to their capability to manipulate electromagnetic (EM) waves dynamically and flexibly. However, the large-scale application and flexible deployment of programmable metasurfaces still face challenges of high communication capacity requirements and stringent energy constraints. Here, we report an ambient-energy-driven space-time-coding metasurface to address these issues.
On one hand, the metasurface can achieve efficient space-frequency-division multiplexing manipulations by dynamically controlling multiple frequencies and the spatial propagation directions of reflection EM waves. On the other hand, the shared-aperture ambient solar energy harvesting capability and low power consumption characteristic of the metasurface enable it to be self-powered without relying on any external power supply. To demonstrate these remarkable features, a four-channel wireless communication system prototype is built using the programmable metasurface. Experimental results confirm that four distinct images can be transmitted to four user terminals simultaneously, independently, and in real time with remarkably low energy consumption per bit.
Such innovative metasurface provides a simple and effective approach for integrating ambient energy harvesting, multi-dimensional microwave manipulation, and direct information modulation on a single physical platform, which will advance the wireless communications in cost-effectiveness, enhanced capacity, energy efficiency, and environmental friendliness.
