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Effective impedance boundary optimization and its contribution to dipole radiation and radiation pattern control

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  • Li Quan

    (Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics and School of Physics, Nanjing University)

  • Xu Zhong

    (Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics and School of Physics, Nanjing University)

  • Xiaozhou Liu

    (Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics and School of Physics, Nanjing University)

  • Xiufen Gong

    (Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics and School of Physics, Nanjing University)

  • Paul A. Johnson

    (Geophysics Group EES-17, Los Alamos National Laboratory)

Abstract

Radiation pattern control has generated much interest recently due to its potential applications. Here we report the observation of high-efficiency dipole-like radiation of sound with broad bandwidth through a decorated plate with periodical two-dimensional Helmholtz resonators on both sides and a single slit at the centre. The decorated plate was optimally designed to adjust the effective impedance of the boundary, and the underlying mechanism of radiation pattern control is attributed to wave vector tailoring. The high radiation efficiency is due to the Fabry–Perot resonances associated with waveguide modes in the centre slit. The method to obtain a collimated beam without any sidelobes is also provided. Our findings should have an impact on acoustic applications.

Suggested Citation

  • Li Quan & Xu Zhong & Xiaozhou Liu & Xiufen Gong & Paul A. Johnson, 2014. "Effective impedance boundary optimization and its contribution to dipole radiation and radiation pattern control," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4188
    DOI: 10.1038/ncomms4188
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    Cited by:

    1. Maxim Shishlenin & Nikita Savchenko & Nikita Novikov & Dmitriy Klyuchinskiy, 2022. "Modeling of 2D Acoustic Radiation Patterns as a Control Problem," Mathematics, MDPI, vol. 10(7), pages 1-14, March.

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