A Battery-Free, Lightweight Wearable Platform Enabled by Material–Antenna Co-Design

University at Buffalo, SUNY

SmartLens

Cyclops

OhmScanner

Abstract

Effective health monitoring is essential for managing chronic diseases, yet current solutions face challenges such as infrastructure dependence, data gaps, and poor user experience. We introduce a low-cost, low-power wearable sensing platform that leverages advanced materials to enable continuous, near-clinical health tracking in everyday environments.

Our work consists of three key innovations:

  • We miniaturize the antenna and embed it into existing wearables like contact lenses to enable long-range backscatter communication (see SmartLens).
  • We enhance the antenna's functionality by integrating sensing capabilities directly into its structure using advanced materials, without compromising communication performance (see Cyclops).
  • We unify these capabilities into a versatile, plug-and-play platform for multi-modal, wireless, and battery-free wearable sensing (see OhmScanner).

OhmScanner: Robust Plug-and-Play Wireless Sensing via Impedance
Liyao Li, Yun Wu, Minsung Kim, Bozhao Shang, Jie Xiong, Wenyao Xu, Xiaojiang Chen, Yaxiong Xie
ACM MobiCom 2025

Cyclops: Battery-Free Contact Lens for Long-Range Intraocular Pressure Sensing
Liyao Li, Bozhao Shang, Yun Wu, Jie Xiong, Xiaojiang Chen, Yaxiong Xie
USENIX NSDI 2024

SmartLens: A Passive, Low-cost and Battery-free Eye Movement Sensing System
Liyao Li, Yaxiong Xie, Jie Xiong, Ziyu Hou, Yingchun Zhang, Qing Wei, Fuwei Wang, Dingyi Fang, Xiaojiang Chen.
ACM MobiCom 2022