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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2024-11-25
Microwave Theremin Piano: SRR-Based Touchpad
By
Vladyslav Tkach,

    Dr. Vladyslav Tkach

    Department of Radio Engineering and Information Security

    Yuriy Fedkovych Chernivtsi National University

    Ukraine

    Homepage

Mykola Khobzei,

    Dr. Mykola Khobzei

    Department of Radio Engineering and Information Security

    Yuriy Fedkovych Chernivtsi National University

    Ukraine

    Homepage

Serhii Haliuk,

    Dr. Serhii Haliuk

    Department of Radio Engineering and Information Security

    Yuriy Fedkovych Chernivtsi National University

    Ukraine

    Homepage

Ihor Safronov,

    Dr. Ihor Safronov

    Department of Radio Engineering and Information Security

    Yuriy Fedkovych Chernivtsi National University

    Ukraine

    Homepage

Andrii Samila,

    Dr. Andrii Samila

    Department of Radio Engineering and Information Security

    Yuriy Fedkovych Chernivtsi National University

    Ukraine

    Homepage

Vjaceslavs Bobrovs,

    Prof. Vjaceslavs Bobrovs

    Institute of Telecommunications

    Riga Technical University

    Latvia

    Homepage

Dmytro Vovchuk

    Dr. Dmytro Vovchuk

    Institute of Photonics, Electronics and Telecommunications

    Riga Technical University

    Latvia

    Homepage

Progress In Electromagnetics Research Letters, Vol. 123, 89-94, 2025
doi:10.2528/PIERL24080404 | Google Scholar

Abstract
Traditional touchscreens, popular for their adaptability and ease of maintenance, typically use capacitive technology where finger contact alters an electrostatic field. Here we demonstrate a touch keyboard configuration, based on a resonant-based system encompassing split-ring resonators (SRRs). These resonators, operating at the GHz spectral range, detect a finger's proximity, changing resonance frequency, but remain unaffected by distant objects - thus allowing for a parallel and independent readout of multiple keys. Specifically, 14 independent keys have been demonstrated, and the frequency-sharing protocol for parallel acquisition of sequences has been successfully implemented. The readout is performed in parallel by monitoring the transmission through a microstrip line, which is equipped with a series of distinct SRRs that resonate at different frequencies. The system has been implemented on an extremely low-cost platform, which can be transformative for similar tasks.
Supplementary Information
Supporting Information-ID24080404.pdf
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Citation
Vladyslav Tkach, Mykola Khobzei, Serhii Haliuk, Ihor Safronov, Andrii Samila, Vjaceslavs Bobrovs, and Dmytro Vovchuk, "Microwave Theremin Piano: SRR-Based Touchpad," Progress In Electromagnetics Research Letters, Vol. 123, 89-94, 2025.
doi:10.2528/PIERL24080404
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