Acoustic prism for continuous beam steering based on piezo-electric metamaterial

J. Xu; J. Tang

doi:10.1117/12.2219464

15 April 2016 Acoustic prism for continuous beam steering based on piezo-electric metamaterial

J. Xu, J. Tang

Proceedings Volume 9799, Active and Passive Smart Structures and Integrated Systems 2016; 97992I (2016) https://doi.org/10.1117/12.2219464
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

This paper investigates an acoustic prism for continuous acoustic beam steering by a simple frequency sweep. This idea takes advantages of acoustic wave velocity shifting in metamaterials in the vicinity of local resonance. We apply this concept into the piezoelectric metamaterial consisting of host medium and piezoelectric LC shunt. Theoretical modeling and FEM simulations are carried out. It is shown that the phase velocity of acoustic wave changes dramatically in the vicinity of local resonance. The directions of acoustic wave can be adjusted continuously between 2 to 16 degrees by a simple sweep of the excitation frequency. Such an electro-mechanical coupling system has a feature of adjusting local resonance without altering the mechanical part of the system.

Citation Download Citation

J. Xu and J. Tang "Acoustic prism for continuous beam steering based on piezo-electric metamaterial", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97992I (15 April 2016); https://doi.org/10.1117/12.2219464

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