Wideband acoustic luneburg lens based on graded index phononic crystal

Chia Fu Wang, Chia Nien Tsai, I. Ling Chang, Lien Wen Chen

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

The present study proposes a wideband two-dimensional Luneburg lens using graded phononic crystals (GPCs). We present a method to broaden the range of operation frequency of the Luneburg lens based on GPCs. The GPCs is composed of circular cylindrical rods with triangular lattice air background. In long wavelength limit assumption, periodic structure behaves like a homogeneous medium since dispersion relations is almost linear. The effective refractive index can be tuned by adjusting the filling ratio. The plan wave expansion method is utilized to calculate the band structures of the locally GPCs and the effective refractive index of the locally GPCs with different filling ratio. Finite element simulations was employed to confirm the acoustic properties of designed device. Our numerical simulations demonstrate that the operation frequency range of GPCs of circular cylindrical rods arranged as triangular array is much wider than those of square array. A wideband acoustic Luneburg lens can be achieved by using graded phononic crystals of triangular array.

原文English
主出版物標題Vibration, Acoustics and Wave Propagation
發行者American Society of Mechanical Engineers (ASME)
ISBN(電子)9780791857564
DOIs
出版狀態Published - 2015 一月 1
事件ASME 2015 International Mechanical Engineering Congress and Exposition, IMECE 2015 - Houston, United States
持續時間: 2015 十一月 132015 十一月 19

出版系列

名字ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
13-2015

Other

OtherASME 2015 International Mechanical Engineering Congress and Exposition, IMECE 2015
國家/地區United States
城市Houston
期間15-11-1315-11-19

All Science Journal Classification (ASJC) codes

  • 機械工業

指紋

深入研究「Wideband acoustic luneburg lens based on graded index phononic crystal」主題。共同形成了獨特的指紋。

引用此