Title :
Acoustic lens using sonic crystal for energy-transmission application
Author :
Kanno, Y. ; Kasai, Y. ; Tsuruta, K. ; Fujimori, K. ; Fukano, H. ; Nogi, S.
Author_Institution :
Grad. Sch. of Natural Sci. & Technol., Okayama Univ., Okayama, Japan
Abstract :
We design and characterize a two-dimensional sonic crystal (SC) to manipulate the propagation of acoustic waves by numerical simulation based on the finite-difference time-domain (FDTD) method and by ultrasonic measurement. Two types of SC for an acoustic lens effect are studied. One is a homogeneous periodic structure exhibiting negative refraction, and the other has a hetero-structure. Negative refraction behavior in the simulation is good agreement with the experiment in the frequency range around 1.2 MHz. We also observe a lens effect for far-field wave in the hetero-structured SC. These results indicate that a novel energy-transmission/harvesting device can be designed using SCs.
Keywords :
acoustic devices; acoustic wave propagation; acoustic wave refraction; finite difference time-domain analysis; periodic structures; ultrasonic measurement; acoustic lens; acoustic wave propagation; energy-harvesting; energy-transmission application; far-field wave; finite-difference time-domain method; homogeneous periodic structure; negative refraction; numerical simulation; two-dimensional sonic crystal; ultrasonic measurement; Acoustic waves; Crystals; Finite difference methods; Lenses; Numerical simulation; Time domain analysis; FDTD simulation; acoustic lens; energy harvesting; negative refraction; sonic crystal; ultrasonic measurement;
Conference_Titel :
Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications (IMWS), 2011 IEEE MTT-S International
Conference_Location :
Uji, Kyoto
Print_ISBN :
978-1-61284-214-1
DOI :
10.1109/IMWS.2011.5877131
