发表机构
Beijing Institute of Technology; Nanyang Technological University; Queen’s University Belfast; Tsinghua University; University of Southampton（北京理工大学; 南洋理工大学; 贝尔法斯特女王大学; 清华大学; 南安普顿大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出LUNA天线架构，利用龙勃透镜统一MIMO与NCR功能，实现低复杂度波束切换，提升频谱、能量效率及定位性能，面向6G网络。
AI 中文摘要
本文介绍了龙勃透镜辅助可重构阵列（LUNA），这是一种在龙勃透镜硬件平台上统一多输入多输出（MIMO）和网络控制中继器（NCR）功能的天线架构。龙勃透镜由渐变折射率介电材料制成，无需有源移相即可将低增益馈源的辐射被动转换为高方向性波束，而密集的无源馈电组和可重构的馈电选择网络以极低的硬件复杂度和功耗电子切换波束方向。我们首先回顾龙勃透镜在雷达和无线通信中的基本原理及应用历史，这激发了其在6G及未来网络中的作用。然后，我们重点说明龙勃透镜和可重构馈电阵列如何构建LUNA-MIMO和LUNA-NCR，其中透镜和馈电组可在不同功能和频段间复用。案例研究表明，LUNA以少量射频链实现了令人满意的频谱效率和能量效率，并提升了感知任务的定位性能。最后，提出了一些开放问题和研究方向，以启发后续对LUNA的研究。
英文摘要
This article introduces the LUneburg-lens-aided recoNfigurable Array (LUNA), an antenna architecture that unifies multiple-input multiple-output (MIMO) and network-controlled repeater (NCR) functionalities in the Luneburg lens-enabled hardware platform. A Luneburg lens, fabricated from graded-index dielectric materials, passively converts the radiation of a low-gain feed into a highly directional beam without active phase shifting, while a dense passive feed bank and a reconfigurable feed-selection network electronically switch the beam directions with minimal hardware complexity and power consumption. We commence by reviewing the basic principles and application history of Luneburg lenses in radar and wireless communications, which motivates their role in 6G-and-advanced networks. Then, we highlight how a Luneburg lens and a reconfigurable feed array construct both LUNA-MIMO and LUNA-NCR, where the lens and feed bank can be reused across functions and frequency bands. Case studies demonstrate that LUNA achieves the satisfactory spectral and energy efficiency with a few radio-frequency chains, and it also improves positioning performance for sensing tasks. Finally, some open problems and research directions are provided to inspire follow-up research on LUNA.
Comments7 pages, 5 figures, 1 table, submitted to IEEE journal for possible publication
