An Integrated 2.4GHz -91.5dBm-Sensitivity Within-Packet Duty-Cycled Wake-Up Receiver Achieving 2µW at 100ms Latency

📋 论文概要

本文提出了一种集成在2.4GHz ISM频段的包内占空比唤醒接收器(WuRX)，实现了-91.5dBm的高灵敏度和2µW的超低功耗，同时保持100ms的低延迟。该设计解决了物联网中需求高灵敏度、高选择性和低功耗的唤醒接收器难题。

💡 主要创新点

• 提出包内占空比技术，在接收数据包期间动态开关电路，降低平均功耗而不牺牲灵敏度。
• 在2.4GHz频段实现-91.5dBm灵敏度与2µW功耗的平衡，延迟仅100ms。
• 集成设计无需外部元件，适合低成本IoT节点。

🏷 关键词

📄 原文摘要

*Equally-Credited Authors (ECAs) The Internet-of-Things (IoT) requires dense sensor networks with low-latency response from wireless devices that operate on severely limited power budgets. Integrated wakeup receivers (WuRX) contribute to this vision by enabling event-driven, energy-efficient connectivity, but they must provide similar sensitivity and interferer tolerance as the main receiver at much lower power. Recent WuRX work has pushed operation into the multi-GHz range, including the 2.4GHz ISM band, but it shows the challenge of simultaneously realizing high sensitivity, high selectivity, and near-µW average power (Pavg) at average latency (Lavg) of milliseconds. A 2.4GHz Envelope-Detector (ED)-first topology WuRX [1] achieved 236nW at a limited sensitivity of -56.5dBm. A -99dBm Tuned-RF WuRX achieved 2.17µW with duty-cycled 61dB RF gain at 434MHz [2], but high gain can lead to instability and limited interference tolerance at multi-GHz. An

👥 作者与机构

Henry L. Bishop*, Anjana Dissanayake*, Steven M. Bowers, Benton H. Calhoun

University of Virginia, Charlottesville, VA