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Related Experiment Video

Updated: Jan 9, 2026

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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Human Body Communication between Pocketed and On-body Devices.

Qi Huang, Shreyas Sen

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 3, 2025
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    Summary

    Human body communication (HBC) enables energy-efficient data transmission for the Internet of Bodies (IoB). This study reveals how pocketed devices impact HBC channel performance, offering insights for future wearable systems.

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    Area of Science:

    • Biomedical Engineering
    • Wireless Communication
    • Human-Computer Interaction

    Background:

    • The Internet of Bodies (IoB) integrates devices on, in, or around the human body for applications like health monitoring.
    • Human Body Communication (HBC) uses the body as a conductive medium, offering an energy-efficient, secure alternative to traditional radio-frequency (RF) methods.
    • Existing research on HBC channel variability primarily focuses on devices in direct body contact, neglecting interactions with mobile devices like smartphones.

    Purpose of the Study:

    • To investigate the channel characteristics of HBC between on-body devices and pocketed devices.
    • To analyze the influence of posture, device position, and orientation on HBC performance.
    • To provide foundational data for designing robust HBC systems incorporating pocketed devices.

    Main Methods:

    • Conducted simulations and measurements using miniaturized wearable devices.
    • Evaluated HBC performance in both electro quasi-static (EQS) and body resonance (BR) frequency regions.
    • Tested various postures, pocketed device positions, and orientations relative to on-body receivers.

    Main Results:

    • Pocketed transmitters (Tx) caused approximately 15 dB greater channel gain reduction in the EQS region compared to the BR region.
    • Pocketed Tx facing upward or downward resulted in ~20 dB and ~8 dB more channel gain degradation in EQS and BR regions, respectively, when Tx and Rx were on different sides.
    • Significant channel gain variations were observed based on device placement and orientation.

    Conclusions:

    • The study elucidates the channel profiles of HBC interactions between pocketed and on-body devices.
    • Findings highlight the substantial impact of pocketed device placement and orientation on signal integrity.
    • This research offers crucial insights for developing effective HBC systems that integrate mobile and wearable technologies.