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    |October 25, 2017
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    Summary

    This study introduces a compact impulse radio ultra-wideband (IR-UWB) antenna for neural recording. The miniaturized antenna enables high-speed data transmission through skin with minimal power and size.

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    Area of Science:

    • Biomedical Engineering
    • Electrical Engineering
    • Antenna Design

    Background:

    • Multichannel neural recording systems require high data rates (10-100 Mbit/s) with limited power and area.
    • Transcutaneous data communication presents challenges due to signal attenuation and the need for miniaturized components.

    Purpose of the Study:

    • To design and evaluate a miniaturized impulse radio ultra-wideband (IR-UWB) antenna for transcutaneous data communication in neural recording.
    • To achieve high radiation efficiency and robustness against misalignment in a compact form factor.

    Main Methods:

    • Developed planar, ellipsoidal dipole antennas on a high permittivity substrate (εr = 10.2).
    • Integrated a pulse generator into a 14mm diameter PCB for the transmitting antenna.
    • Utilized a circularly polarized antenna for the external receiver to mitigate misalignment effects.

    Main Results:

    • Demonstrated less than 30dB attenuation through porcine skin in the 6-8.5GHz frequency band.
    • Achieved pulse repetition rates up to 100MHz at a 1.5cm transmission distance.
    • The miniaturized antenna prototype achieved high radiation efficiency in a small physical size.

    Conclusions:

    • The developed IR-UWB antenna is suitable for transcutaneous data communication in multichannel neural recording systems.
    • The design offers a viable solution for high-speed, low-power, and compact wireless data transmission through biological tissue.
    • The use of a circularly polarized receiver enhances system robustness.