Resonant modal analysis of the two-dimensional phononic crysals transducers

Author

Hong-lang Li ; Wen-jia Tian ; Ya-hui Tian ; Xiao-xi Li ; Yong-qiang Bai ; Shi-tang He

Author_Institution

Inst. of Acoust., Beijing, China

fYear

2014

fDate

Oct. 30 2014-Nov. 2 2014

Firstpage

401

Lastpage

403

Abstract

A three-dimensional (3D) finite element method (FEM) model was proposed to analyze the resonant modal of the transducers based on two-dimensional (2D) phononic crystals (PnCs). Using this model two modals existed with symmetric modal and anti-symmetric modal can be extracted, and then reflectivity of the transducers was derived. An example of transducer based on 2D PnCs composed of IDTs of aluminum strips and tungsten stubs on top of IDTs was analyzed. The calculated reflectivity with different thickness of the stubs shows that a optimal thickness of tungsten stubs exists for a specified IDTs. This modal analysis offer a useful tool for the optimal designing 2D PnCs on the surface acoustic waves devices.

Keywords

finite element analysis; interdigital transducers; modal analysis; phononic crystals; 2D phononic crystal transducers; 3D finite element method; IDT; aluminum strips; antisymmetric modal; optimal thickness; resonant modal analysis; stub thickness; surface acoustic waves devices; transducer reflectivity; tungsten stubs; Analytical models; Finite element analysis; Reflectivity; Solid modeling; Surface acoustic waves; Transducers; Frequency response; Phononic crystal; Resonant modal; Surface acoustic wave; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA), 2014 Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4799-6424-6

Type

conf

DOI

10.1109/SPAWDA.2014.6998609

Filename

6998609