Efficient analysis of periodic structures in microacoustic devices

Author

Jakoby, B. ; Vellekoop, M.J.

Author_Institution

Electron. Instrum. Lab., Delft Univ. of Technol., Netherlands

Volume

1

fYear

1997

fDate

5-8 Oct 1997

Firstpage

113

Abstract

Periodic structures utilized as transducer or reflector elements play an important role in microacoustic wave devices. Such structures can be described using approximate analytical models. However, to obtain the accuracy required for reliable device simulation, numerical methods have to be employed. In this contribution we present an efficient numerical approach to calculate the dispersion curves associated with microacoustic modes propagating in periodic structures. The computational efficiency is related to the utilization of the Fast Fourier Transform (FFT) algorithm in a hybrid Method of Moments (MoM)/Mode Matching analysis. From the obtained dispersion curves characteristic parameters such as the stopband width can be obtained which can be used in a coupling-of-modes model of the structure

Keywords

acoustic dispersion; coupled mode analysis; fast Fourier transforms; method of moments; mode matching; surface acoustic wave waveguides; FFT algorithm; computational efficiency; coupling of modes model; dispersion curve; hybrid analysis; method of moments; microacoustic wave device; mode matching; numerical simulation; periodic structure; reflector; stopband width; transducer; Analytical models; Computational efficiency; Fast Fourier transforms; Frequency; Instruments; Loaded waveguides; Message-oriented middleware; Moment methods; Periodic structures; Waveguide theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.662990

Filename

662990