摘要
推导出一维掺杂声子晶体的转移矩阵,研究了多通道声子晶体滤波器的设计问题。得出:通过调节杂质的厚度能够实现对滤波通道数目的选择和对滤波频率的调谐。通过改变声子晶体材料的声阻抗能够实现对滤波通道的频率半高宽的调节。设计出滤波通道的频率可调范围达600Hz、滤波通道的频率半高宽的可调范围在3Hz—14Hz之间的三通道声子晶体滤波器。
The transfer matrix of the one-dimensional doping phononic crystal was derived .The multi-channels filter of the photonic crystal was studied. The variation of the thickness of the impurity can change the number of the channels and the channel frequencies . The variation of the sound impedance of the phononic crystal can change The FWHM of the filter. The three channels filter of the photonic crystal was designed in which, the frequency control scope of the filter is 600Hz, and the FWHM of the filter is in 3Hz to 14Hz between.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第3期117-119,123,共4页
Journal of Vibration and Shock
关键词
声子晶体
转移矩阵
缺陷模
滤波器
photonic crystal
transfer matrix
defect mode
filter
