微型週期性結構聲波頻溝理論分析與微機電實驗（2/2）
Date Issued
2005-07-31
Date
2005-07-31
Author(s)
DOI
932212E002025
Abstract
The purpose of this research is to study
the characteristics of acoustic band gaps in
two-dimensional phononic crystals. The
phononic crystal is a kind of periodic elastic
material structure that there are some band
gaps in which the elastic wave propagation
of particular frequency is forbidden. In this
project, personal computer clusters were
employed and adjusted to meet the
requirements of RAM and CPU time. A
parallel computer program based on the
finite-difference time-domain (FDTD)
method was developed and discussed. The
FDTD program was then used to calculate
the propagating phenomena of BAW and
SAW modes in two-dimensional phononic
crystals. In the experimental part, high
frequency SAW device was fabricated
and integrated to the phononic crystal to
study the band-gap characteristics.
Finally, the experimental results were
compared with that of the numerical
results, and the potential applications
were also discussed.
Subjects
Phononic crystals
Band gaps
Cluster
Finite-difference time-domain
SAW
Waveguides
Publisher
臺北市：國立臺灣大學應用力學研究所
Type
report
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