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    Coherent ultra-wideband (UWB) radar-on-chip technology accurately measures cardiovascular dynamics and arterial pulse waves in multiple body locations. This demonstrates potential for portable, low-cost, long-term heart health monitoring devices.

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    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Microwave Engineering

    Background:

    • Portable and low-cost medical devices are needed for monitoring cardiovascular system functioning.
    • Ultra-wideband (UWB) radar-on-chip technology offers potential for high-speed, sub-millimeter motion tracking within the body.
    • Challenges remain in in-body sensing using low-power microwave equipment and wideband signals for imaging.

    Purpose of the Study:

    • To provide substantial evidence for measuring cardiovascular dynamics using radar-on-chip technology.
    • To demonstrate the robustness and repeatability of UWB radar measurements across multiple participants.
    • To establish the fundamentals for developing UWB radar-on-chip imaging systems for medical applications.

    Main Methods:

    • Coherent UWB radar-on-chip systems were used to record cardiovascular signals.
    • Electrocardiography (ECG) was employed for signal synchronization.
    • ECG-aligned averaging was utilized to measure arterial pulse waves at various body locations.

    Main Results:

    • Arterial pulse waves were successfully measured at multiple body locations using UWB radar-on-chip.
    • Pulse arrival time was determined with high precision.
    • Blood pressure pulse wave propagation and cardiac dynamics from the chest were demonstrated across four participants with repeatable results.

    Conclusions:

    • Radar-on-chip technology is a viable method for measuring cardiovascular dynamics.
    • The findings support the development of portable, low-cost devices for long-term cardiovascular monitoring.
    • This research lays the groundwork for advanced UWB radar-on-chip medical imaging systems.