AI 中文总结
本文针对离网场景物联网设备充电难题，提出多卫星联合服务地面设备的天基协同无线能量传输方案，评估了不同协同方案的功率表现，探讨超表面集成及星间激光传输等关键技术，梳理了相关挑战与研究方向。
AI 中文摘要
基于卫星的无线能量传输（WPT）或可成为离网场景下物联网（IoT）设备充电的变革性解决方案，这类场景中传统技术难以高效满足紧急能源需求。本文回顾了基于微波的远程充电在卫星WPT中的优势与局限，随后提出天基协同WPT构想，即多颗卫星联合服务地面设备网络。文中呈现了潜在应用案例并强调应用需求，采用两种协同方案评估目标位置的平均接收功率，对非目标位置的功率溢出进行统计表征，还阐明了不同工作距离及对等卫星收发孔径下的星间激光WPT性能，探讨在卫星孔径与地面网络集成超表面以提升能量转换效率、可扩展性及波束管理的方案，最后概述了实现该构想的相关挑战与研究方向。
英文摘要
Satellite-enabled wireless power transfer (WPT) may be a transformative solution for charging Internet of Things (IoT) devices in off-grid scenarios where traditional technologies struggle to efficiently meet urgent energy demands. In this article, we review the advantages and limitations of microwave-based long-distance charging for satellite-enabled WPT. We then introduce our vision of coordinated space-based WPT, where multiple satellites jointly serve networks of ground devices. Potential use cases are presented highlighting application requirements. We evaluate the average received power at the target locations using two coordination schemes and perform a statistical characterization of the power spillover on undesired locations. We also shed light on the performance of inter-satellite laser WPT for different operating distances and transmit-receive apertures of the peer satellites. Moreover, we explore the integration of metasurfaces on satellite apertures and ground networks to boost energy conversion efficiency, scalability, and beam management. Finally, we outline relevant challenges and research directions towards implementing our vision.
Comments7 pages, 4 figures, 2 tables, submitted to IEEE Internet of Things Magazine
