A ULP Long-Range Active-RF Tag with Automatic AntennaInterface Calibration Achieving 20.5% TX Efficiency at -22dBm

📋 论文概要

本文提出了一种超低功耗长距离有源RF标签，通过自动天线接口校准技术，实现了20.5%的发射效率（在-22dBm EIRP下）和-60.4dBm的接收灵敏度，接收功耗仅为17.8nW。该设计针对事件驱动的物联网应用，如远程控制和牲畜监测，旨在延长电池寿命并降低维护成本。

💡 主要创新点

• 提出自动天线接口校准技术，优化天线与射频前端匹配，提升发射效率。
• 采用包络检测器优先的唤醒接收器架构，在纳瓦级功耗下实现高灵敏度。
• 整体设计实现超低功耗与长距离通信的平衡，适用于事件驱动IoT场景。

🏷 关键词

📄 原文摘要

Zhizhan Yang1, Jun Yin1, Wei-Han Yu1, Haochen Zhang1, Pui-In Mak1, Rui P. Martins1,2 University of Macau, Macau, China Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 For event-driven IoT applications such as long-range remote control and livestock monitoring, an ultra-low-power (ULP) active-RF Tag capable of communicating over a long distance will be attractive to enhance the battery lifespan and save maintenance costs. The recent wake-up receivers (RXs) using an envelope-detector (ED)-first architecture demonstrated <%60dBm sensitivity with a nano-Watt power budget [1-3], yet the transmitter (TX) output power and efficiency limited the communication distance and battery lifespan. Communicating with an RFID reader [4] at a 160m distance entails a tag sensitivity of only %43dBm for the downlink, while the tag equivalent isotropically radiated power (EIRP) has to be %16dBm to uphold the same distance for the uplink (Fig.

👥 作者与机构

EIRP, and -60.4dBm Sensitivity at 17.8nW RX Power