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<p>This study presents a three-channel Phononic Crystal (PnC) for acoustic wave filtering to enhance frequency selectivity and signal control. By strategically connecting three parallel paths within a PnC slab, we demonstrate precise manipulation of acoustic wave propagation. The input signal represents sets of signals passing through one channel (80&#xa0;MHz, 120&#xa0;MHz, and 200&#xa0;MHz) at the input probe and extracted separately at outputs through three PnC channels; each output contains a single frequency: output one, 80&#xa0;MHz; output two, 120&#xa0;MHz; and output three, 200&#xa0;MHz. This frequency filtering is achieved by sweeping the PnC lattice dimensions to generate four band gaps, each one allowing a single frequency from the three inputs to pass. The finite element analysis method is applied to verify the displacement and transmission attenuation through each channel. The simulation results validate that the triple-PnC channel configuration can be used for acoustic wave filtering compared to conventional systems. This work advances the field of acoustic metamaterials by introducing a scalable multi-channel methodology for next-generation acoustic filters.</p>

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Three-channel acoustic wave filter in a phononic crystal based slab

  • 期刊论文

  • 发表日期：

    2025年12月27日

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  • Mohammed Awad,
  • Temesgen Bailie Workie,
  • Jing-Fu Bao,
  • Ken-ya Hashimoto

摘要

This study presents a three-channel Phononic Crystal (PnC) for acoustic wave filtering to enhance frequency selectivity and signal control. By strategically connecting three parallel paths within a PnC slab, we demonstrate precise manipulation of acoustic wave propagation. The input signal represents sets of signals passing through one channel (80 MHz, 120 MHz, and 200 MHz) at the input probe and extracted separately at outputs through three PnC channels; each output contains a single frequency: output one, 80 MHz; output two, 120 MHz; and output three, 200 MHz. This frequency filtering is achieved by sweeping the PnC lattice dimensions to generate four band gaps, each one allowing a single frequency from the three inputs to pass. The finite element analysis method is applied to verify the displacement and transmission attenuation through each channel. The simulation results validate that the triple-PnC channel configuration can be used for acoustic wave filtering compared to conventional systems. This work advances the field of acoustic metamaterials by introducing a scalable multi-channel methodology for next-generation acoustic filters.