Constitution Method for Broadband Acoustic Metamaterials Based on the Design Theory of a One-Dimensional Distributed Transmission-Line Model

Author:

Nakagawa Tomoya,Nagayama TsutomuORCID,Fukushima Seiji,Watanabe Toshio

Abstract

A method for realizing broadband acoustic metasurfaces composed of a one-dimensional distributed transmission-line model is proposed. There are no design formulas for determining the structural parameters of the structure constituting acoustic metasurfaces in the conventional method, and therefore parameter extractions by means of many calculations with numerical simulations are needed to realize acoustic metasurfaces. There are also narrow band operations or impedance matching problems. On the other hand, this paper shows that we can design broadband acoustic metasurfaces by determining the structural parameters with the design formulas of the model without many calculations. An acoustic metasurface that refracts incident plane waves at an angle of 20 degrees is first designed by using one-dimensional meander acoustic waveguide structures equivalent to the model, and these structural parameters are determined by the design formulas of the model and the modifications of the error from the theory. Full-wave simulations are performed, and the broadband operations and the validity of the design theory are shown from these results. Furthermore, a broadband acoustic flat lens is designed with the proposed structures as an example of the application of the proposed method, and these operations are also demonstrated by similar full-wave simulations.

Publisher

MDPI AG

Subject

Inorganic Chemistry,Condensed Matter Physics,General Materials Science,General Chemical Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Design Method for Broadband Metasurfaces with a Function of a Two-dimensional Axicon Lens;2024 Photonics & Electromagnetics Research Symposium (PIERS);2024-04-21

2. Design Method of Broadband Metasurfaces for Generating a Two-dimensional Gaussian Beam from a Normal Incident Plane Wave with the Same Amplitude Distribution;2023 Photonics & Electromagnetics Research Symposium (PIERS);2023-07-03

3. Light Beam Steering Demonstration by Using Liquid Crystal Loaded Metasurface;2023 Photonics & Electromagnetics Research Symposium (PIERS);2023-07-03

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