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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Fully Flexible Textile Antenna-Backed Sensor Node for Body-Worn UWB Localization.

Dries Van Baelen1, Nicola Macoir1, Quinten Van den Brande1

  • 1Department of Information Technology, Ghent University-Imec, Technologiepark-Zwijnaarde 126, 9052 Gent, Belgium.

Sensors (Basel, Switzerland)
|March 3, 2021
PubMed
Summary
This summary is machine-generated.

This study presents a flexible, wearable sensor node using an Impulse Radio Ultra-Wideband (IR-UWB) system for precise personal localization. Six nodes ensure full body coverage, demonstrating a practical, flexible sensor system.

Keywords:
UWBflexible electronicslocalizationtextile antennaultra-widebandwearable sensor systemswireless body area network

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Area of Science:

  • Wearable technology
  • Antenna design
  • Localization systems

Background:

  • Accurate personal localization is crucial for various applications.
  • Existing systems often lack mechanical flexibility and integration.
  • Wearable antennas require optimization to mitigate body effects.

Purpose of the Study:

  • To design and manufacture a mechanically flexible textile antenna-backed sensor node for accurate personal localization.
  • To integrate Decawave's DW1000 Impulse Radio Ultra-Wideband (IR-UWB) Integrated Circuit (IC) into a wearable system.
  • To validate the performance of the flexible sensor system in a complete localization setup.

Main Methods:

  • Utilizing a flexible polyimide foil with components mounted on a wearable cavity-backed slot antenna.
  • Designing the antenna for IR-UWB localization in IEEE 802.15.4-2011 Channels 2 and 3 (3744 MHz-4742.4 MHz).
  • Optimizing the antenna's radiation pattern and measuring its time-domain characteristics for localization accuracy.

Main Results:

  • A mechanically supple sensor system was realized by combining the antenna and a bendable Printed Circuit Board (PCB).
  • System validation showed that six nodes deployed around the body provide comprehensive coverage.
  • The system demonstrated an autonomy of 13.3 hours on a 5 V 200 mAh battery without sleep mode.

Conclusions:

  • The developed system serves as a proof of concept for integrating localization electronics and sensors with a full-textile antenna.
  • The mechanically flexible sensor system offers accurate personal localization capabilities.
  • Further development can enhance autonomy through sleep mode functionalities.