Acoustic Zero-Index Metamaterials for Leaky-Wave Antennas
Abstract
In this work, we introduce an advanced acoustic leaky-wave antenna employing zero-refractive-index metamaterials (ZIMs) that significantly surpasses traditional designs in terms of radiation ef-ficiency and directivity. Our design features a novel space-coiling structure, which manipulates the Dirac-like dispersion based on accidental degeneracy to achieve double-zero-index metamaterials (DZIM). The newly developed acoustic Dirac leaky-wave antenna (ADLWA) achieves more than double the radiation efficiency of conventional antennas based on arrays with side holes and mem-branes. It exhibits superior directional control, allowing for precise beam scanning by adjusting the frequency. Additionally, the ADLWA functions effectively as a passive sonar system, capable of de-tecting the direction of moving sound sources. This breakthrough enhances acoustic wave control and promises significant advancements in sensing and communication technologies.
Keywords
Cite
@article{arxiv.2410.20377,
title = {Acoustic Zero-Index Metamaterials for Leaky-Wave Antennas},
author = {keqiang Lyu and Ying Wu},
journal= {arXiv preprint arXiv:2410.20377},
year = {2024}
}
Comments
11 pages, 6 figures