Kludze, AtsutseKono, JunichiroMittleman, Daniel M.Ghasempour, Yasaman2024-10-292024-10-292024Kludze, A., Kono, J., Mittleman, D. M., & Ghasempour, Y. (2024). A frequency-agile retrodirective tag for large-scale sub-terahertz data backscattering. Nature Communications, 15(1), 8756. https://doi.org/10.1038/s41467-024-53035-5https://hdl.handle.net/1911/117966Backscattering is a promising power-efficient communication technique providing sustainable wireless links with a low carbon footprint. This approach is a critical enabler for dense IoT networks, which are forecast to grow to 41 billion by 2025. However, existing backscatter designs are limited to the sub-6 GHz bands or narrowband operation in the millimeter-wave regime; therefore, they fail to concurrently support many interference-free low-power users. Enabling a frequency-agile wideband backscatter design in the sub-terahertz offers a two-pronged advantage for densely deployed backscatter networks: spatial reuse enabled by directionality and frequency multiplexing enabled by the large available bandwidth. We present the first sub-THz backscatter architecture that operates above 100 GHz. Our design relies on a detailed understanding of reciprocity in leaky-wave devices and offers a realistic joint localization and communication protocol for sub-THz backscatter networks.engExcept where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.Journal articles41467-024-53035-5https://doi.org/10.1038/s41467-024-53035-5