A Near-Field RF Reflection Transceiver ASIC for Continuous Unobtrusive Blood Pressure Monitoring

📋 论文概要

该论文提出了一种用于连续无创血压监测的近场射频反射收发器ASIC，采用65nm CMOS工艺。通过近场射频反射方法实现非接触监测，并利用SAR直流偏移消除和闭环相位校准技术提高临床精度。人体实验验证了该芯片在6mmHg平均绝对误差内实现准确血压提取。

💡 主要创新点

• 采用近场射频反射（NRR）方法实现非接触式连续血压监测，提升佩戴舒适性和长期使用可行性。
• 集成SAR型直流偏移消除和闭环相位校准技术，有效抑制接收泄漏和相位误差，达到临床级精度。

🏷 关键词

📄 原文摘要

Abstract This work presents continuous, unobtrusive, and clinically accurate BP monitoring in a fully wearable form factor using an near-field RF reflection TRx ASIC in 65nm CMOS. The NRR approach enables noncontact monitoring with comfort and long-term wear. The optimized TRx achieves 98.6nVRMS IRN, while SAR-based DC-offset cancellation and closed-loop phase calibration mitigate Rx leakage and phase error for clinical accuracy. The ASIC is thoroughly validated in human studies achieving accurate BP extraction within 6mmHg mean absolute error. Continuous, unobtrusive, and clinically accurate blood pressure (BP) monitoring provides crucial diagnostic value for cardiovascular disease. Conventional singular BP measurement using sphygmomanometers, though clinically accurate, is uncomfortable and unable to capture continuous BP trends, which are far stronger predictors of cardiovascular mortality.

👥 作者与机构

Yiming Han, Neelotpala Kumar, Linran Zhao, Jide Yinka Adebiyi, Linrui Jiang, Hao Lu, Gina Perkins, Hirofumi Tanaka, Deji Akinwande, Yaoyao Jia

University of Texas, Austin, TX