RadioGami: Batteryless, Long-Range Wireless Paper Sensors Using Tunnel Diodes

2025-06-06

AI Summary

Addressing the need for sustainable, low-cost wireless sensing, this work tackles the challenges of battery dependency, limited communication range, and high fabrication cost in conventional sensor systems. Method: We propose a battery-free, long-range paper-based RF sensing platform fabricated using DIY copper tape and origami-inspired structures (Miura/Kresling), integrated with a tunnel diode–based ultra-low-power switching circuit (35 μW), RF backscatter communication, and miniature photovoltaic energy harvesting—enabling fully environment-driven, self-powered operation. Contribution/Results: This is the first demonstration of tunnel diodes for switch-based sensing on paper substrates and the first validation of origami-induced deformations being wirelessly identifiable at an unprecedented distance of 45.73 m. The system supports multimodal interaction sensing—including tearing, bending, sliding, rotation, and ambient temperature/humidity changes—with a total unit cost of ~$20. Deployed across diverse real-world scenarios, it demonstrates strong scalability, manufacturability, and educational accessibility.

Technology Category

• Intelligent Robots: Multimodal Perception & Sensor Fusion
• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Application Domains: Internet of Things, Sensor Networks & Smart Cities

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Energy management for devices in mobile Web and WoT environments
• Security and Privacy: Large-scale security measurements
• Responsible Web: Human-perceived consequences of algorithmic deployment on the web

Abstract

Paper-based interactive RF devices have opened new possibilities for wireless sensing, yet they are typically constrained by short operational ranges. This paper introduces RadioGami, a method for creating long-range, batteryless RF sensing surfaces on paper using low-cost, DIY materials like copper tape, paper, and off-the-shelf electronics paired with an affordable radio receiver (approx. $20). We explore the design space enabled by RadioGami, including sensing paper deformations like bending, tearing, and origami patterns (Miura, Kresling) at ranges up to 45.73 meters. RadioGami employs a novel ultra-low power (35uW) switching circuit with a tunnel diode for wireless functionality. These surfaces can sustainably operate by harvesting energy using tiny photodiodes. We demonstrate applications that monitor object status, track user interactions (rotation, sliding), and detect environmental changes. We characterize performance, sensitivity, range, and power consumption with deployment studies. RadioGami advances sustainable, tangible, and batteryless interfaces for embodied interaction.

Problem

• Enables long-range batteryless wireless sensing on paper
• Detects paper deformations like bending and tearing remotely
• Uses sustainable energy harvesting for low-power operation

Innovation

• Batteryless RF sensing using tunnel diodes
• Long-range wireless with DIY materials
• Energy harvesting via tiny photodiodes