LeakyScatter: A Frequency-Agile Directional Backscatter Network Above 100 GHz
LeakyScatter: A Frequency-Agile Directional Backscatter Network Above 100 GHz
复制标题
DOI：
--
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Atsu Kludze;Yasaman Ghasempour
中科院分区：
文献类型：
--
作者：
Atsu Kludze;Yasaman Ghasempour
无线后向散射被认为适合于各种新兴的能量受限应用，因为其具有低功耗架构。虽然现有的反向散射节点通常在低于6 GHz的频带下工作，但移动到亚太赫兹频带在将低功率连接性扩展到密集用户群体方面提供了显著的优势;因为在该频率范围内，考虑到大范围的可用带宽和激光形状的波束方向性，并发传输可以在频谱和空间域中分离。然而，无线设备的功耗和复杂性随着频率显著增加。在本文中，我们提出了LeakyScatter，第一个反向散射系统，使定向，低功耗和频率捷变的无线链路超过100 GHz。LeakyScatter从传统的反向散射设计出发，引入了一种依赖于漏波器件中孔径互易性的新型架构。我们已经制造了LeakyScatter，并通过广泛的模拟和空中实验评估了其性能。我们的研究结果表明，100 GHz以上的可扩展无线链路是反向的，工作在大带宽（几十GHz）和超低功耗（零功耗定向转向和≤ 1 mW的数据调制）。
Wireless backscattering has been deemed suitable for various emerging energy-constrained applications given its low-power architectures. Although existing backscatter nodes often operate at sub-6 GHz frequency bands, moving to the sub-THz bands offers significant advantages in scaling low-power connectivity to dense user populations; as concurrent transmissions can be separated in both spectral and spatial domains given the large swath of available bandwidth and laser-shaped beam directionality in this frequency regime. However, the power consumption and complexity of wireless devices increase significantly with frequency. In this paper, we present LeakyScatter, the first backscatter system that enables directional, low-power, and frequency-agile wireless links above 100 GHz. LeakyScatter departs from conventional backscatter designs and introduces a novel architecture that relies on aperture reciprocity in leaky-wave devices. We have fabricated LeakyScatter and evaluated its performance through extensive simulations and over-the-air experiments. Our results demonstrate a scalable wireless link above 100 GHz that is retrodirective and operates at a large bandwidth (tens of GHz) and ultra-low-power (zero power consumed for directional steering and ≤ 1 mW for data modulation).