Overview

• The research prototype uses a coil with distributed capacitors to boost magnetic communication without active amplification.
• Measured power draw of roughly 30–500 microwatts enabled more than a month of operation on a single charge in reported tests.
• Bluetooth was rejected as too power-hungry and NFC as too short-range, motivating the custom semi-passive approach.
• Current constraints include relative bulk for a ring, susceptibility to wireless interference, and support only for simple inputs such as scrolling and pressing.
• Findings are published in the ACM UIST 2025 proceedings, with the team targeting AR/VR use and exploring future comfort, reliability, and possible health-sensing applications.